{ "data": { "a": { "slug": "mermaid-chart", "name": "Mermaid Chart MCP", "vendor": "Mermaid Chart", "vendorUrl": "https://mermaid.ai", "kind": "mcp", "category": "diagramming", "summary": "Hosted MCP server for Mermaid diagrams from mermaid.ai.", "url": "https://www.anchorterminal.com/tools/mermaid-chart", "markdownUrl": "https://www.anchorterminal.com/tools/mermaid-chart.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mermaid-chart.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mermaid-chart.json", "transports": [ "streamable-http", "sse" ], "remoteUrl": "https://mcp.mermaid.ai/mcp", "packages": [ { "registry": "npm", "name": "@mermaidchart/sdk" } ], "auth": "mixed", "authNotes": "Render and validation tools need no auth. Account tools need a Mermaid Chart token generated in account settings and sent as the Authorization header (the docs show the raw token, no Bearer prefix). The TypeScript SDK uses OAuth.", "pricing": "freemium", "pricingNotes": "Basic $0 with 3 diagrams and 15 AI credits. Plus $10 a user a month billed yearly ($12 monthly) with unlimited diagrams and 300 AI credits a year. Premium $20 billed yearly ($24 monthly) with 2,000 AI credits a year and free viewer seats. Enterprise custom. The render tools on the MCP server are free without an account (https://mermaid.ai/pricing).", "priceSummary": "$12 / seat-mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 support in docs or pricing (checked 2026-09-30).", "endpoints": [] }, "toolCount": 25, "popularity": { "githubStars": null, "npmWeekly": 395, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://mermaid.ai/docs/ai/mcp-server", "registryName": "com.mermaidchart/mermaid-mcp", "capabilities": [ "diagram.create", "diagram.as-code", "diagram.edit", "diagram.export" ], "tags": [ "hosted", "freemium", "free-tier", "mcp", "diagram-as-code", "closed-source" ], "lastRelease": "2026-09-17", "graded": true, "anchor": { "graded": true, "score": 31.4, "grade": "F", "agentReady": false, "rank": 1028, "ranked": true, "rankOf": 1084, "categoryRank": 16, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 34, "maintenance": 53, "payments": 45, "reliability": 15, "schema": 32, "security": 20, "transparency": 45 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Validation and rendering work with no account or key. Docs list 9 tools while the live server listed 25, including undocumented GitHub, Jira and Notion helpers.", "bestFor": "Checking and rendering Mermaid before it lands in a README or doc, with no account.", "strengths": [ "Validation and rendering work with no account or key", "Mermaid is plain-text diagram-as-code that renders natively on GitHub and many docs tools", "Hosted, nothing to install, streamable HTTP and SSE", "Official MIT TypeScript SDK, release 0.2.8 on 17 September 2026" ], "weaknesses": [ "Docs list 9 tools while the live server listed 25, including undocumented GitHub, Jira and Notion helpers", "Account tools take a raw token in the Authorization header, with no OAuth or scopes", "No status page, rate limits, changelog, security page or SLA", "Privacy policy last updated September 2024 and names no AI provider", "No public REST API reference, and API access is by application form" ], "agentNotes": [ "Call `validate_and_render_mermaid_diagram` to check syntax before committing Mermaid to a repo. It needs no token", "Only add the token if you need to save into Mermaid Chart projects. It reaches every project on the account", "If you only need a picture, the open-source mermaid-cli renders locally with no network call", "Use mcp.mermaid.ai. The registry still lists the older mcp.mermaidchart.com host" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 2.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "F", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 31.4 } ], "editorialScores": { "ergonomics": 34, "maintenance": 53, "payments": 45, "reliability": 15, "schema": 32, "security": 20, "transparency": 29 }, "provenanceScore": 60 }, "connect": { "claudeCode": "claude mcp add --transport http mermaid https://mcp.mermaid.ai/mcp --header \"Authorization: $MERMAID_CHART_TOKEN\"", "config": { "mcpServers": { "mermaid": { "headers": { "Authorization": "${MERMAID_CHART_TOKEN}" }, "type": "http", "url": "https://mcp.mermaid.ai/mcp" } } } }, "letme": { "capability": "https://letme.dev/diagram.create", "tool": "https://letme.dev/mermaid-chart" }, "area": "design-diagrams", "unitPrices": [ { "item": "Plus plan", "unit": "seat-month", "usd": 12, "note": "billed monthly, $10 billed yearly. 300 AI credits a year" }, { "item": "Premium plan", "unit": "seat-month", "usd": 24, "note": "billed monthly, $20 billed yearly. 2,000 AI credits a year" } ], "provenance": { "legalEntity": "Mermaid Chart Inc.", "domain": "mermaid.ai", "domainRegistered": "2017-12-16", "domainNote": "mermaid.ai was registered in 2017 and transferred on 2025-06-02. The company's earlier domain, mermaidchart.com, was registered on 2022-06-14 and now redirects here.", "endpointOnVendorDomain": true, "terms": "https://mermaid.ai/terms-and-conditions", "privacy": "https://mermaid.ai/web/privacy-policy", "statusPage": "", "changelog": "", "securityTxt": "unknown", "checked": "2026-10-01", "notes": [ "Mermaid Chart Inc., 548 Market Street, PMB 75432, San Francisco, CA 94104-5401 (privacy policy, last updated 13 September 2024)", "The terms are governed by Delaware law and give no postal address", "/.well-known/security.txt and /llms.txt on mermaid.ai returned 401 on 30 September, so neither could be read", "The official MCP registry entry, published 2025-09-18, still points at mcp.mermaidchart.com" ], "score": 60 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/mermaid-chart.json", "live": { "slug": "mermaid-chart", "probe": { "target": "https://mcp.mermaid.ai/mcp", "method": "mcp-initialize", "lastAt": "2026-10-14T22:57:45.761141208Z", "lastOk": true, "lastStatus": 401, "lastMs": 443, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 461, "p95ms24h": 542, "samples24h": 250, "samples30d": 3664, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 239, "ok": 239 } ] }, "versions": [ { "registry": "mcp-registry", "name": "com.mermaidchart/mermaid-mcp", "version": "1.0.0", "seenAt": "2026-10-14T04:18:30.41681267Z" }, { "registry": "npm", "name": "@mermaidchart/sdk", "version": "0.2.8", "seenAt": "2026-10-13T23:08:48.735693153Z" } ], "npmWeekly": 233, "securityTxt": { "url": "https://mermaid.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-14T15:46:18.92924064Z" }, "domain": { "domain": "mermaid.ai", "registered": "2017-12-16", "source": "https://rdap.identitydigital.services/rdap/domain/mermaid.ai", "checkedAt": "2026-10-11T13:23:29.855709337Z" }, "pages": [ { "url": "https://mermaid.ai/pricing", "kind": "pricing", "status": 304, "checkedAt": "2026-10-14T21:03:18.117579816Z", "changedAt": "2026-10-12T19:54:48.201311819Z", "fingerprint": "cfc3318f5f45" }, { "url": "https://mermaid.ai/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-01T13:14:15.99559282Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "6adb40a489d6" }, { "url": "https://mermaid.ai/web/privacy-policy", "kind": "privacy", "status": 304, "checkedAt": "2026-10-14T21:03:22.125575765Z", "changedAt": "2026-10-12T19:54:52.466986573Z", "fingerprint": "5dc8e9b3ead1" }, { "url": "https://mermaid.ai/terms-and-conditions", "kind": "terms", "status": 304, "checkedAt": "2026-10-14T21:03:20.126369028Z", "changedAt": "2026-10-12T19:54:50.39187049Z", "fingerprint": "e5bd53cfebc8" } ], "mcpTools": { "url": "https://mcp.mermaid.ai/mcp", "checkedAt": "2026-10-14T22:17:46.096792931Z", "status": "ok", "note": "last answer auth: asks for credentials before listing its tools; tools as last listed", "protocol": "2025-11-25", "tools": [ { "name": "validate_and_render_mermaid_diagram", "description": "SIMPLE RENDER TOOL - Renders Mermaid diagrams directly (Mermaid automatically validates during rendering). If successful, returns diagram image. If Mermaid validation fails, returns error details for fixing. One tool, one call, simple workflow.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking.", "type": "string" }, "diagramType": { "description": "The type of Mermaid diagram (e.g., 'flowchart', 'sequenceDiagram', 'gantt').", "type": "string" }, "mermaidCode": { "description": "Mermaid code to render. Mermaid validates automatically during rendering - if invalid, tool returns error details for fixing.", "type": "string" }, "prompt": { "description": "A text description of the diagram to generate.", "type": "string" }, "useUrlShortener": { "default": true, "description": "Whether to use URL shortening for the Mermaid link. Defaults to true, set to false to disable shortening.", "type": "boolean" } }, "required": [ "prompt", "mermaidCode", "diagramType", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "get_diagram_title", "description": "Generate a descriptive title for a Mermaid diagram based on its content. This tool analyzes the diagram structure and content to suggest an appropriate title.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking.", "type": "string" }, "currentTitle": { "description": "Optional: The current title of the diagram, if any, for context.", "type": "string" }, "diagramContent": { "description": "The Mermaid diagram content/code for which to generate a title.", "type": "string" }, "diagramType": { "description": "Optional: The type of Mermaid diagram (e.g., 'flowchart', 'sequenceDiagram', 'gantt') for better context in title generation.", "type": "string" } }, "required": [ "diagramContent", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "get_diagram_summary", "description": "Generate a concise summary for a Mermaid diagram based on its content. This tool provides prompts for the LLM to generate a brief summary (2-4 sentences) highlighting the primary flow, key decisions, and outcomes.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking.", "type": "string" }, "contextHint": { "description": "Optional: Context hint to help generate a more accurate summary.", "type": "string" }, "diagramContent": { "description": "The Mermaid diagram content/code for which to generate a summary.", "type": "string" } }, "required": [ "diagramContent", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "search_mermaid_icons", "description": "Search for available Mermaid icons by provider or name. Returns icons in ready-to-use format with provider prefixes (e.g., 'aws:arch-amazon-ec2'). PERFORMANCE TIP: For faster searches, start with limit=10 and specific queries. If no suitable icons found, increase limit and retry. Supports AWS, Azure, GCP, and FontAwesome icon sets.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking.", "type": "string" }, "limit": { "default": 10, "description": "Optional: Maximum number of results to return per provider. Defaults to 10 for performance. Increase if needed.", "type": "number" }, "provider": { "description": "Optional: Filter by specific provider ('aws', 'azure', 'gcp', 'fa'). If not provided, searches all providers.", "type": "string" }, "query": { "description": "Search query for icons (e.g., 'aws', 'azure', 'gcp', 'fa', 'lambda', 's3', 'database'). Use specific terms for better results.", "type": "string" } }, "required": [ "query", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "get_mermaid_syntax_document", "description": "Get comprehensive syntax documentation and examples for a specific Mermaid diagram type. Returns the official Mermaid.js documentation with syntax rules, examples, and usage instructions for the requested diagram type.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking.", "type": "string" }, "diagramType": { "description": "The type of Mermaid diagram to get syntax documentation for (e.g., 'flowchart', 'sequenceDiagram', 'architecture-beta', 'gantt', 'gitgraph', 'classDiagram', 'stateDiagram', etc.).", "type": "string" } }, "required": [ "diagramType", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "list_tools", "description": "Lists all available MCP servers and their tools in the workspace.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "OPTIONAL: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking.", "type": "string" } }, "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "list_repos", "description": "List GitHub repositories for the authenticated user, or for an organization when `org` is set. REQUIRES: `Github-Token` header (HTTP) or `GITHUB_TOKEN` / `GH_TOKEN` in the server environment.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "org": { "description": "Optional: organization login. If set, lists that org's repositories; otherwise lists repos for the authenticated user.", "type": "string" }, "page": { "default": 1, "maximum": 9007199254740991, "minimum": 1, "type": "integer" }, "per_page": { "default": 30, "maximum": 100, "minimum": 1, "type": "integer" }, "type": { "default": "all", "description": "User repo filter; ignored when `org` is set.", "enum": [ "all", "owner", "member", "public", "private" ], "type": "string" } }, "required": [ "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "list_mermaid_files", "description": "List .mmd Mermaid files in a GitHub repository (code search with tree fallback). REQUIRES: `Github-Token` header (HTTP) or GITHUB_TOKEN / GH_TOKEN.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "owner": { "description": "Repository owner (user or organization).", "type": "string" }, "ref": { "description": "Optional branch, tag, or commit for tree fallback when code search is unavailable.", "type": "string" }, "repo": { "description": "Repository name.", "type": "string" } }, "required": [ "owner", "repo", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "read_mermaid_file", "description": "Read a single .mmd file from a GitHub repository. Only paths ending in .mmd are allowed. REQUIRES: `Github-Token` header (HTTP) or GITHUB_TOKEN / GH_TOKEN.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "owner": { "type": "string" }, "path": { "description": "Path to the .mmd file in the repository.", "type": "string" }, "ref": { "description": "Optional: branch, tag, or commit SHA; defaults to the default branch.", "type": "string" }, "repo": { "type": "string" } }, "required": [ "owner", "repo", "path", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "create_pr", "description": "Create a new branch (git ref), one commit from the base tree with your file changes, then open a pull request in the same repository. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN with `contents: write` (and no existing branch with the same `headBranch` name).", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "baseBranch": { "description": "Branch to base the PR on (e.g. main). Defaults to the repo default branch.", "type": "string" }, "body": { "description": "PR description (markdown).", "type": "string" }, "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "commitMessage": { "description": "Single commit message for the file changes.", "type": "string" }, "files": { "description": "Files to add or update.", "items": { "properties": { "content": { "description": "Full UTF-8 file content.", "type": "string" }, "path": { "description": "Repo-relative file path.", "type": "string" } }, "required": [ "path", "content" ], "type": "object" }, "minItems": 1, "type": "array" }, "headBranch": { "description": "Name of the new branch (must not already exist on the remote).", "type": "string" }, "owner": { "type": "string" }, "repo": { "type": "string" }, "title": { "type": "string" } }, "required": [ "owner", "repo", "headBranch", "title", "body", "commitMessage", "files", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": false } }, { "name": "push_file", "description": "Create or update a single file on a given branch in a GitHub repository. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN with contents write access.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "branch": { "description": "Branch to commit to.", "type": "string" }, "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "content": { "description": "Full file content.", "type": "string" }, "message": { "description": "Commit message.", "type": "string" }, "owner": { "type": "string" }, "path": { "type": "string" }, "repo": { "type": "string" }, "sha": { "description": "Existing blob SHA to update; omit to create or to let the service detect.", "type": "string" } }, "required": [ "owner", "repo", "path", "content", "branch", "message", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": false } }, { "name": "list_pulls", "description": "List pull requests for a GitHub repository. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "owner": { "type": "string" }, "page": { "default": 1, "maximum": 9007199254740991, "minimum": 1, "type": "integer" }, "per_page": { "default": 30, "maximum": 100, "minimum": 1, "type": "integer" }, "repo": { "type": "string" }, "state": { "default": "open", "enum": [ "open", "closed", "all" ], "type": "string" } }, "required": [ "owner", "repo", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "list_branches", "description": "List or resolve branch names. **List mode (default):** one `GET /repos/.../branches?per_page=100\u0026page=1` — at most 100 names, A–Z sorted in the response; `has_more` if a full page was returned. **Resolve mode:** set `branch_name` for a single `GET` branch (404 if missing). At most one GitHub API call. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "branch_name": { "description": "Exact branch name. When non-empty, returns that branch only. Omit to fetch the first 100 branches only.", "type": "string" }, "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "owner": { "type": "string" }, "repo": { "type": "string" } }, "required": [ "owner", "repo", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "list_issues", "description": "List issues for a repository (excludes pull requests). REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "direction": { "default": "desc", "enum": [ "asc", "desc" ], "type": "string" }, "labels": { "description": "Comma-separated label names (GitHub API format).", "type": "string" }, "owner": { "type": "string" }, "page": { "default": 1, "maximum": 9007199254740991, "minimum": 1, "type": "integer" }, "per_page": { "default": 30, "maximum": 100, "minimum": 1, "type": "integer" }, "repo": { "type": "string" }, "since": { "description": "ISO 8601: only issues updated at or after this time.", "type": "string" }, "sort": { "default": "created", "enum": [ "created", "updated", "comments" ], "type": "string" }, "state": { "default": "open", "enum": [ "open", "closed", "all" ], "type": "string" } }, "required": [ "owner", "repo", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "create_issue", "description": "Create an issue in a GitHub repository. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN with issues write if creating issues in private repos.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "body": { "description": "Issue body in markdown.", "type": "string" }, "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "labels": { "description": "Label names (must already exist in the repository).", "items": { "type": "string" }, "type": "array" }, "owner": { "type": "string" }, "repo": { "type": "string" }, "title": { "type": "string" } }, "required": [ "owner", "repo", "title", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": false } }, { "name": "get_issue_comments", "description": "List comments on an issue by issue number. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "issue_number": { "description": "Issue number (not a PR number unless the PR is also addressed as an issue on GitHub).", "maximum": 9007199254740991, "minimum": 1, "type": "integer" }, "owner": { "type": "string" }, "page": { "default": 1, "maximum": 9007199254740991, "minimum": 1, "type": "integer" }, "per_page": { "default": 30, "maximum": 100, "minimum": 1, "type": "integer" }, "repo": { "type": "string" } }, "required": [ "owner", "repo", "issue_number", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "get_pull_comments", "description": "Get all pull request comments: both issue/PR thread comments and inline review comments, with a `type` of `issue_thread` or `review` per item. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "owner": { "type": "string" }, "page": { "default": 1, "maximum": 9007199254740991, "minimum": 1, "type": "integer" }, "per_page": { "default": 30, "maximum": 100, "minimum": 1, "type": "integer" }, "pull_number": { "description": "Pull request number.", "maximum": 9007199254740991, "minimum": 1, "type": "integer" }, "repo": { "type": "string" } }, "required": [ "owner", "repo", "pull_number", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "generate_ticket_dependency_tree", "description": "Generate a Mermaid flowchart that visualises Jira issue dependency links for a project. Each node shows the ticket key, summary, and status, and is a clickable link to the ticket. Dashed nodes represent issues linked from outside the current filter set.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "assignee": { "description": "Filter by assignee — Jira account ID, display name, or 'currentUser()'.", "type": "string" }, "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "minLength": 1, "type": "string" }, "colorMode": { "default": "light", "description": "Color scheme for the diagram: 'light' (default pastel fills), 'dark' (deep fills for dark backgrounds), or 'none' (no fill/stroke overrides, inherits the Mermaid theme).", "enum": [ "light", "dark", "none" ], "type": "string" }, "createdAfter": { "description": "Include only issues created on or after this date, ISO format: '2024-01-15'.", "type": "string" }, "createdBefore": { "description": "Include only issues created on or before this date, ISO format: '2024-03-31'.", "type": "string" }, "maxResults": { "default": 50, "description": "Target number of issues to render in the tree (1–100, default 50).", "maximum": 100, "minimum": 1, "type": "integer" }, "projectKey": { "description": "REQUIRED: Jira project key, e.g. 'PROJ' or 'MYTEAM'. Used as the base JQL project filter.", "minLength": 1, "type": "string" }, "reporter": { "description": "Filter by reporter — Jira account ID or display name.", "type": "string" }, "sprint": { "description": "Filter by sprint name or numeric ID, e.g. 'Sprint 12' or '42'.", "type": "string" }, "status": { "description": "Filter by issue status, e.g. 'In Progress', 'To Do', 'Done'.", "type": "string" }, "useUrlShortener": { "default": true, "description": "Shorten the preview/edit URL via Short.io. Disable to get the full unshortened URL (default true).", "type": "boolean" } }, "required": [ "projectKey", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "generate_jira_kanban_board", "description": "Generate a Mermaid kanban board from Jira issues. Issues are grouped into columns by their current status and ordered by workflow stage (To Do → In Progress → Done). Each card shows the issue summary and is a clickable link to the ticket, with optional assignee and priority badges.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "assignee": { "description": "Filter by assignee — Jira account ID, display name, or 'currentUser()'.", "type": "string" }, "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "minLength": 1, "type": "string" }, "issueType": { "description": "Filter by issue type, e.g. 'Story', 'Bug', 'Task'.", "type": "string" }, "maxResults": { "default": 50, "description": "Maximum number of issues to fetch (1–100, default 50).", "maximum": 100, "minimum": 1, "type": "integer" }, "projectKey": { "description": "REQUIRED: Jira project key, e.g. 'PROJ' or 'MYTEAM'.", "minLength": 1, "type": "string" }, "sprint": { "description": "Filter by sprint name or numeric ID, e.g. 'Sprint 12' or '42'.", "type": "string" } }, "required": [ "projectKey", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "generate_ticket_diagram", "description": "Generate a Mermaid flowchart centred on a single Jira ticket. Fetches the ticket's subtasks, parent, issue links, and recent comments in one call. The focal ticket is highlighted in indigo; subtasks are grouped in a subgraph; issue links use colour-coded arrows (red thick = blocks, cyan dashed = relates to); comments appear in a rose subgraph.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "minLength": 1, "type": "string" }, "colorMode": { "default": "light", "description": "Color scheme for the diagram: 'light' (default pastel fills), 'dark' (deep fills for dark backgrounds), or 'none' (no fill/stroke overrides, inherits the Mermaid theme).", "enum": [ "light", "dark", "none" ], "type": "string" }, "ticketKey": { "description": "REQUIRED: Jira issue key, e.g. 'MC-123' or 'PROJ-42'.", "minLength": 1, "type": "string" } }, "required": [ "ticketKey", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "generate_ticket_timeline", "description": "Generate a Mermaid diagram showing the history of a single Jira ticket using its changelog. Two views are available:\n- **state**: stateDiagram-v2 showing all status transitions with dates and authors, nodes coloured by status category.\n- **timeline** (default): Mermaid timeline grouped by month, showing status changes, assignee changes, priority changes, sprint moves, and resolutions.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "minLength": 1, "type": "string" }, "ticketKey": { "description": "REQUIRED: Jira issue key, e.g. 'MC-123' or 'PROJ-42'.", "minLength": 1, "type": "string" }, "view": { "default": "timeline", "description": "Diagram view to generate. 'state' shows status transitions; 'timeline' shows all field changes over time.", "enum": [ "state", "timeline" ], "type": "string" } }, "required": [ "ticketKey", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "get_notion_page_mermaid_diagrams", "description": "Extract all Mermaid code blocks from a Notion page. Returns block ID, diagram code, and optional caption for each block.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "pageUrl": { "description": "URL of the Notion page (e.g. https://www.notion.so/My-Page-abc123...).", "format": "uri", "type": "string" } }, "required": [ "pageUrl", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "get_notion_mermaid_diagram_by_block_id", "description": "Retrieve a single Mermaid diagram block by its block ID. Returns the diagram code and optional caption.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "blockId": { "description": "The Notion block ID of the mermaid code block (e.g. from get_notion_page_mermaid_diagrams).", "type": "string" }, "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" } }, "required": [ "blockId", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": true } }, { "name": "update_notion_mermaid_diagram", "description": "Update the Mermaid source code (and optional caption) of an existing mermaid code block by its block ID.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "blockId": { "description": "The Notion block ID of the mermaid code block to update.", "type": "string" }, "caption": { "description": "Optional new caption. Omit to clear the existing caption.", "type": "string" }, "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "code": { "description": "New Mermaid diagram source code.", "type": "string" } }, "required": [ "blockId", "code", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": false } }, { "name": "insert_notion_mermaid_diagram", "description": "Append a Mermaid diagram as a code block to a Notion page. The block is added at the end of the page content.", "inputSchema": { "$schema": "http://json-schema.org/draft-07/schema#", "properties": { "caption": { "description": "Optional caption displayed below the code block.", "type": "string" }, "clientName": { "description": "REQUIRED: The name of the client/agent using the MCP server for analytics tracking.", "type": "string" }, "code": { "description": "Mermaid diagram source code.", "type": "string" }, "pageUrl": { "description": "URL of the Notion page to insert the diagram into.", "format": "uri", "type": "string" } }, "required": [ "pageUrl", "code", "clientName" ], "type": "object" }, "annotations": { "readOnlyHint": false } } ], "schemaTokens": 6198, "changedAt": "2026-09-30T21:57:02.278667952Z", "check": { "checker": "anchor-check/1.0", "totalTokens": 6198, "counts": { "error": 0, "note": 1, "warn": 11 }, "findings": [ { "rule": "TC11", "severity": "warn", "tool": "create_issue", "message": "3 parameters without a description: owner, repo, title", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "create_pr", "message": "3 parameters without a description: owner, repo, title", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "get_issue_comments", "message": "4 parameters without a description: owner, page, per_page, repo", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "get_pull_comments", "message": "4 parameters without a description: owner, page, per_page, repo", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "list_branches", "message": "2 parameters without a description: owner, repo", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "list_issues", "message": "7 parameters without a description: direction, owner, page, per_page, repo, sort and 1 more", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "list_pulls", "message": "5 parameters without a description: owner, page, per_page, repo, state", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "list_repos", "message": "2 parameters without a description: page, per_page", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "push_file", "message": "3 parameters without a description: owner, path, repo", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC11", "severity": "warn", "tool": "read_mermaid_file", "message": "2 parameters without a description: owner, repo", "fix": "Describe each one: format, units, an example, and what happens when it's left out." }, { "rule": "TC21", "severity": "warn", "tool": "list_pulls", "message": "described almost the same as list_issues (82% of the same words)", "fix": "Say in each description when to use it instead of the other." }, { "rule": "TC24", "severity": "note", "message": "25 of 25 tools have no outputSchema", "fix": "Declare outputSchema for tools that return structured data, and return structuredContent that matches it." } ] } }, "updatedAt": "2026-10-14T22:57:45.761141208Z" } }, "answer": "Mermaid Chart MCP scores 31.4 (F) on agent readiness against Mumble's 7.5 (F), and leads in every scored category.", "b": { "slug": "mumble", "name": "Mumble", "vendor": "tiny space", "vendorUrl": "https://www.tinyspace.ai", "kind": "platform", "category": "diagramming", "summary": "Mumble is a macOS app from tiny space that transcribes a conversation on the Mac and draws a diagram as people talk, linking each box to the words behind it. It is in beta behind an early-access waitlist.", "url": "https://www.anchorterminal.com/tools/mumble", "markdownUrl": "https://www.anchorterminal.com/tools/mumble.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mumble.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mumble.json", "license": "No licence, terms of use or source repository was found on tinyspace.ai or GitHub (checked 2026-10-14). The app and the `mumble-mcp` binary are not published as open source", "transports": [], "packages": [], "auth": "none", "authNotes": "No credential exists for an outside agent, since neither the app nor `mumble-mcp` can be downloaded publicly. Per the docs, `mumble-mcp` is a local stdio binary that needs no API key and is bounded by the folder path passed at start. The AI functions run through the person's own signed-in Claude Code or Codex, and Mumble never asks for or stores an API key (https://www.tinyspace.ai/mumble/docs, checked 2026-10-14).", "pricing": "byo-plan", "pricingNotes": "Free while Mumble is in beta, and local use on the Mac is stated to stay free after the beta. The live map runs on the person's own Claude Code or Codex plan, so its cost is that plan's allowance. Transcription-only mode needs neither. Two paid plans, Private (one-off price) and Team (monthly), are marked coming soon with no price published (https://www.tinyspace.ai/mumble#pricing, checked 2026-10-14).", "priceSummary": "Your plan", "where": "local", "x402": { "level": "no", "evidence": "Local app and local stdio MCP server with no payments. No x402, MPP or L402 on the Mumble pages, docs or llms.txt (checked 2026-10-14).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-14" }, "docsUrl": "https://www.tinyspace.ai/mumble/docs", "llmsTxt": "https://www.tinyspace.ai/llms.txt", "capabilities": [ "diagram.create", "diagram.edit", "diagram.architecture", "diagram.export", "meetings.recording", "meetings.transcript", "meetings.summary", "speech.stt" ], "tags": [ "official", "local", "desktop", "macos", "byo-plan", "beta", "waitlist", "not-for-agents", "closed-source", "llms-txt", "no-status-page" ], "graded": true, "own": true, "disclosure": "Mumble is made by tiny space, the company of Quynh Tran-Thanh, a founder of Anchor Terminal. It's graded the same way as every listing, by the same published checklist with the same readings, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed. letme never picks it.", "anchor": { "graded": true, "score": 7.5, "grade": "F", "agentReady": false, "rank": 1081, "ranked": true, "rankOf": 1084, "categoryRank": 17, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 0, "maintenance": 0, "payments": 30, "reliability": 5, "schema": 10, "security": 0, "transparency": 13 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-14" }, "negative": 0, "verdict": "Mumble keeps audio on the Mac and stores each conversation as plain files in ~/Mumble, with canvas JSON that diffs cleanly. There is no API or MCP server an outside agent can call today. The documented `mumble-mcp` has no public download, package or repository, and the app is reached only through an early-access waitlist.", "bestFor": "A person on a Mac with early access who wants a live, transcript-linked diagram of a call or workshop, kept as plain files in git, and who already pays for Claude Code or Codex.", "disclosure": "Mumble is made by tiny space, the company of Quynh Tran-Thanh, a founder of Anchor Terminal. It's graded the same way as every listing, by the same published checklist with the same readings, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed. letme never picks it.", "strengths": [ "Audio is transcribed on the Mac with whisper.cpp and, per tiny space, never uploaded. Transcription-only mode sends nothing to an AI provider", "Each conversation is a folder of plain files in ~/Mumble, and canvas JSON is serialised deterministically with stable node ids, so edits show as small diffs", "Every box links to the transcript passage behind it, and items the person didn't ask for are drawn as proposals to accept or reject", "AI functions run on the person's own Claude Code or Codex account, and Mumble says it never asks for or stores an API key", "Free during the beta, and local use on the Mac is stated to stay free after it" ], "weaknesses": [ "No API or MCP server an outside agent can call. The documented `mumble-mcp` binary has no public download, package or repository (checked 14 October 2026)", "Access is an early-access waitlist with email confirmation, and no download of the app was found", "No terms of use, privacy policy, legal entity, changelog or security.txt was found on tinyspace.ai", "Transcript text and map context go to the person's Claude Code or Codex provider whenever AI functions are on", "English only, with no speaker labels and no shared editing, and Mac only (macOS 13 or later)" ], "agentNotes": [ "Don't plan to call Mumble from another agent. Neither the app nor `mumble-mcp` can be obtained publicly, so hand the task to a person with early access", "Don't configure `/path/to/mumble-mcp` from the docs. It is a placeholder, and no binary is published", "If the person already has Mumble, read ~/Mumble/\u003ccapture\u003e/ directly, `capture.json` for the transcript and `diagram.canvas` for the map", "Keep canvas keys in schema order and never rename a node id, or the edges that name it are orphaned and the canvas is refused. Use git as the undo", "Don't write to a capture that is being recorded. The app doesn't merge the two versions" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "F", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 7.5 } ], "editorialScores": { "ergonomics": 0, "maintenance": 0, "payments": 30, "reliability": 5, "schema": 10, "security": 0, "transparency": 10 }, "provenanceScore": 16 }, "letme": { "capability": "https://letme.dev/diagram.create" }, "area": "design-diagrams", "unitPrices": [ { "item": "Beta", "unit": "month", "usd": 0, "note": "free during the beta. AI functions use the person's own Claude Code or Codex plan" } ], "provenance": { "legalEntity": "", "domain": "tinyspace.ai", "domainRegistered": "2026-07-02", "endpointOnVendorDomain": null, "terms": "", "privacy": "https://www.tinyspace.ai/mumble/privacy", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-10-14", "notes": [ "The site names the maker only as \"tiny space, an independent product lab\". No legal entity, company number or address was found on any page in the sitemap.", "No terms of use or legal privacy policy was found. /terms, /privacy, /mumble/terms and /mumble/pricing return 404. The privacy link is a data-flow page, \"What leaves your Mac\", with no controller named.", "RDAP for tinyspace.ai gives a registration date of 2026-07-02 through Cloudflare Registrar, with the registrant country GB and other registrant data redacted.", "www.tinyspace.ai/.well-known/security.txt returns 404.", "robots.txt allows all paths except /api/ and /confirmed. Neither was fetched.", "No GitHub repository for Mumble or `mumble-mcp` was found through GitHub search, and neither `@mumble/core` nor `mumble-mcp` is on npm." ], "score": 16 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/mumble.json", "live": { "slug": "mumble", "pages": [ { "url": "https://www.tinyspace.ai/mumble", "kind": "pricing", "status": 200, "checkedAt": "2026-10-14T21:18:06.178841242Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "60045050cf24" }, { "url": "https://www.tinyspace.ai/mumble/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-14T21:18:08.205956187Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "5969b7ce2cf7" } ], "updatedAt": "2026-10-14T21:18:08.205956187Z" } }, "facts": [ { "a": "MCP server", "b": "Platform", "name": "Kind" }, { "a": "Mermaid Chart", "b": "tiny space", "name": "Vendor" }, { "a": "https://mcp.mermaid.ai/mcp", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "Streamable HTTP, SSE (legacy)", "b": "", "name": "Transports" }, { "a": "OAuth or key", "b": "None", "name": "Auth" }, { "a": "Freemium", "b": "Your plan", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "none", "b": "No licence, terms of use or source repository was found on tinyspace.ai or GitHub (checked 2026-10-14). The app and the `mumble-mcp` binary are not published as open source", "name": "Licence" }, { "a": "25", "b": "none", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "com.mermaidchart/mermaid-mcp", "b": "not listed", "name": "MCP registry" }, { "a": "2026-09-17", "b": "none", "name": "Last release" }, { "a": "no date given", "b": "no document linked", "name": "Terms last updated" }, { "a": "2024-09-13", "b": "no date given", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "", "name": "Terms restrict automated access" }, { "a": "yes", "b": "", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "", "name": "Arbitration or class-action waiver" }, { "a": "395 npm/wk", "b": "none", "name": "Popularity" }, { "a": "2.5/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Mermaid Chart MCP scores 31.4 (F) on agent readiness against Mumble's 7.5 (F), and leads in every scored category.", "question": "Which is better for AI agents, Mermaid Chart MCP or Mumble?" }, { "answer": "Mermaid Chart MCP has a hosted endpoint at https://mcp.mermaid.ai/mcp. No hosted endpoint is listed for Mumble.", "question": "Can an agent call Mermaid Chart MCP and Mumble without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 15 against 5", "Schema \u0026 documentation, 32 against 10", "Agent ergonomics, 34 against 0", "Security \u0026 auth, 20 against 0", "Payments \u0026 pricing, 45 against 30", "Maintenance \u0026 community, 53 against 0", "Transparency \u0026 trust, 45 against 13" ], "also": [ "A hosted endpoint, with nothing to install" ], "goodFor": "Checking and rendering Mermaid before it lands in a README or doc, with no account.", "slug": "mermaid-chart", "watchFor": "Docs list 9 tools while the live server listed 25, including undocumented GitHub, Jira and Notion helpers" }, { "aheadOn": null, "also": [ "No key needed to call it" ], "goodFor": "A person on a Mac with early access who wants a live, transcript-linked diagram of a call or workshop, kept as plain files in git, and who already pays for Claude Code or Codex.", "slug": "mumble", "watchFor": "No API or MCP server an outside agent can call. The documented `mumble-mcp` binary has no public download, package or repository (checked 14 October 2026)" } ], "job": { "capability": "diagram.create", "name": "Diagram creation" }, "others": [ { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-mermaid-chart.json", "title": "Cloudviz API vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-mumble.json", "title": "Cloudviz API vs Mumble", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/d2-vs-mumble.json", "title": "D2 vs Mumble", "url": "https://www.anchorterminal.com/compare/d2-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/diagrams-so-vs-mermaid-chart.json", "title": "Diagrams.so API + MCP vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/diagrams-so-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/diagrams-so-vs-mumble.json", "title": "Diagrams.so API + MCP vs Mumble", "url": "https://www.anchorterminal.com/compare/diagrams-so-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/drawio-vs-mermaid-chart.json", "title": "draw.io + MCP vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/drawio-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/drawio-vs-mumble.json", "title": "draw.io + MCP vs Mumble", "url": "https://www.anchorterminal.com/compare/drawio-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/eraser-vs-mermaid-chart.json", "title": "Eraser API + MCP vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/eraser-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/eraser-vs-mumble.json", "title": "Eraser API + MCP vs Mumble", "url": "https://www.anchorterminal.com/compare/eraser-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/excaliclaw-vs-mermaid-chart.json", "title": "ExcaliClaw vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/excaliclaw-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/excaliclaw-vs-mumble.json", "title": "ExcaliClaw vs Mumble", "url": "https://www.anchorterminal.com/compare/excaliclaw-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-mermaid-chart.json", "title": "Excalidraw vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-mumble.json", "title": "Excalidraw vs Mumble", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/kroki-vs-mumble.json", "title": "Kroki vs Mumble", "url": "https://www.anchorterminal.com/compare/kroki-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/lucid-vs-mermaid-chart.json", "title": "Lucid API + MCP vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/lucid-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/lucid-vs-mumble.json", "title": "Lucid API + MCP vs Mumble", "url": "https://www.anchorterminal.com/compare/lucid-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/mermaid-chart-vs-mural-mcp.json", "title": "Mermaid Chart MCP vs Mural MCP", "url": "https://www.anchorterminal.com/compare/mermaid-chart-vs-mural-mcp" }, { "json": "https://www.anchorterminal.com/compare/mermaid-chart-vs-plantuml.json", "title": "Mermaid Chart MCP vs PlantUML", "url": "https://www.anchorterminal.com/compare/mermaid-chart-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/mermaid-chart-vs-structurizr.json", "title": "Mermaid Chart MCP vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/mermaid-chart-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/mermaid-chart-vs-tldraw.json", "title": "Mermaid Chart MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/mermaid-chart-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/mermaid-chart-vs-whimsical.json", "title": "Mermaid Chart MCP vs Whimsical MCP", "url": "https://www.anchorterminal.com/compare/mermaid-chart-vs-whimsical" }, { "json": "https://www.anchorterminal.com/compare/mumble-vs-mural-mcp.json", "title": "Mumble vs Mural MCP", "url": "https://www.anchorterminal.com/compare/mumble-vs-mural-mcp" }, { "json": "https://www.anchorterminal.com/compare/mumble-vs-plantuml.json", "title": "Mumble vs PlantUML", "url": "https://www.anchorterminal.com/compare/mumble-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/mumble-vs-structurizr.json", "title": "Mumble vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/mumble-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/mumble-vs-tldraw.json", "title": "Mumble vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/mumble-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/mumble-vs-whimsical.json", "title": "Mumble vs Whimsical MCP", "url": "https://www.anchorterminal.com/compare/mumble-vs-whimsical" }, { "json": "https://www.anchorterminal.com/compare/d2-vs-mermaid-chart.json", "title": "D2 vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/d2-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/kroki-vs-mermaid-chart.json", "title": "Kroki vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/kroki-vs-mermaid-chart" } ], "scores": [ { "by": 10, "edge": "mermaid-chart", "key": "reliability", "mermaid-chart": 15, "mumble": 5, "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 22, "edge": "mermaid-chart", "key": "schema", "mermaid-chart": 32, "mumble": 10, "name": "Schema \u0026 documentation", "weight": 13 }, { "by": 34, "edge": "mermaid-chart", "key": "ergonomics", "mermaid-chart": 34, "mumble": 0, "name": "Agent ergonomics", "weight": 13 }, { "by": 20, "edge": "mermaid-chart", "key": "security", "mermaid-chart": 20, "mumble": 0, "name": "Security \u0026 auth", "weight": 14 }, { "by": 15, "edge": "mermaid-chart", "key": "payments", "mermaid-chart": 45, "mumble": 30, "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 53, "edge": "mermaid-chart", "key": "maintenance", "mermaid-chart": 53, "mumble": 0, "name": "Maintenance \u0026 community", "weight": 7 }, { "by": 32, "edge": "mermaid-chart", "key": "transparency", "mermaid-chart": 45, "mumble": 13, "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Mermaid Chart MCP scores 31.4 (F) on agent readiness against Mumble's 7.5 (F), and leads in every scored category. Both do diagram creation.", "verdicts": { "mermaid-chart": "Validation and rendering work with no account or key. Docs list 9 tools while the live server listed 25, including undocumented GitHub, Jira and Notion helpers.", "mumble": "Mumble keeps audio on the Mac and stores each conversation as plain files in ~/Mumble, with canvas JSON that diffs cleanly. There is no API or MCP server an outside agent can call today. The documented `mumble-mcp` has no public download, package or repository, and the app is reached only through an early-access waitlist." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/mermaid-chart-vs-mumble", "json": "https://www.anchorterminal.com/compare/mermaid-chart-vs-mumble.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/mermaid-chart-vs-mumble.md", "slim": "https://www.anchorterminal.com/compare/mermaid-chart-vs-mumble.min.md" }, "markdown": "Mermaid Chart MCP scores 31.4 (F) on agent readiness against Mumble's 7.5 (F), and leads in every scored category. Both do diagram creation.\n\n- Mermaid Chart MCP: grade F, 31.4/100, rank #1028 of 1084. Markdown https://www.anchorterminal.com/tools/mermaid-chart.md · JSON https://www.anchorterminal.com/api/v1/tools/mermaid-chart.json\n- Mumble: grade F, 7.5/100, rank #1081 of 1084. Markdown https://www.anchorterminal.com/tools/mumble.md · JSON https://www.anchorterminal.com/api/v1/tools/mumble.json\n- Best diagramming APIs and diagram-as-code for AI agents: https://www.anchorterminal.com/best/diagramming/index.md\n- All 128 diagrams comparisons: https://www.anchorterminal.com/compare/diagramming/index.md\n\n## Which one, for what\n\n### Mermaid Chart MCP (F)\n\nGood for: Checking and rendering Mermaid before it lands in a README or doc, with no account.\n\nAhead on:\n- Reliability, 15 against 5\n- Schema \u0026 documentation, 32 against 10\n- Agent ergonomics, 34 against 0\n- Security \u0026 auth, 20 against 0\n- Payments \u0026 pricing, 45 against 30\n- Maintenance \u0026 community, 53 against 0\n- Transparency \u0026 trust, 45 against 13\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n\nWatch for: Docs list 9 tools while the live server listed 25, including undocumented GitHub, Jira and Notion helpers\n\n### Mumble (F)\n\nGood for: A person on a Mac with early access who wants a live, transcript-linked diagram of a call or workshop, kept as plain files in git, and who already pays for Claude Code or Codex.\n\nAlso in its favour:\n- No key needed to call it\n\nWatch for: No API or MCP server an outside agent can call. The documented `mumble-mcp` binary has no public download, package or repository (checked 14 October 2026)\n\n\n## Score by category\n\n| Category | Weight | Mermaid Chart MCP | Mumble | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 15 | 5 | Mermaid Chart MCP +10 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 32 | 10 | Mermaid Chart MCP +22 |\n| Agent ergonomics | 13% (16.2 this run) | 34 | 0 | Mermaid Chart MCP +34 |\n| Security \u0026 auth | 14% (17.5 this run) | 20 | 0 | Mermaid Chart MCP +20 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 45 | 30 | Mermaid Chart MCP +15 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 53 | 0 | Mermaid Chart MCP +53 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 45 | 13 | Mermaid Chart MCP +32 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **31.4 · F** | **7.5 · F** | |\n\n## Facts side by side\n\n| Fact | Mermaid Chart MCP | Mumble |\n| --- | --- | --- |\n| Kind | MCP server | Platform |\n| Vendor | Mermaid Chart | tiny space |\n| Hosted endpoint | `https://mcp.mermaid.ai/mcp` | no (local only) |\n| Transports | Streamable HTTP, SSE (legacy) | |\n| Auth | OAuth or key | None |\n| Pricing | Freemium | Your plan |\n| x402 | no | no |\n| Licence | none | No licence, terms of use or source repository was found on tinyspace.ai or GitHub (checked 2026-10-14). The app and the `mumble-mcp` binary are not published as open source |\n| Tools exposed | 25 | none |\n| Read-only variant documented | no | no |\n| llms.txt | no | yes |\n| MCP registry | `com.mermaidchart/mermaid-mcp` | not listed |\n| Last release | 2026-09-17 | none |\n| Terms last updated | no date given | no document linked |\n| Privacy policy last updated | 2024-09-13 | no date given |\n| Customer content may train models | not found in the text | |\n| Terms restrict automated access | not found in the text | |\n| Terms restrict benchmarking | yes | |\n| Terms or service can change without notice | not found in the text | |\n| Arbitration or class-action waiver | not found in the text | |\n| Popularity | 395 npm/wk | none |\n| Agent reviews | 2.5/5 (2) | none |\n\n## Verdicts\n\n**Mermaid Chart MCP.** Validation and rendering work with no account or key. Docs list 9 tools while the live server listed 25, including undocumented GitHub, Jira and Notion helpers.\n\n**Mumble.** Mumble keeps audio on the Mac and stores each conversation as plain files in ~/Mumble, with canvas JSON that diffs cleanly. There is no API or MCP server an outside agent can call today. The documented `mumble-mcp` has no public download, package or repository, and the app is reached only through an early-access waitlist.\n\n## Before you call either\n\n### Mermaid Chart MCP\n\n1. Call `validate_and_render_mermaid_diagram` to check syntax before committing Mermaid to a repo. It needs no token\n2. Only add the token if you need to save into Mermaid Chart projects. It reaches every project on the account\n3. If you only need a picture, the open-source mermaid-cli renders locally with no network call\n4. Use mcp.mermaid.ai. The registry still lists the older mcp.mermaidchart.com host\n\n### Mumble\n\n1. Don't plan to call Mumble from another agent. Neither the app nor `mumble-mcp` can be obtained publicly, so hand the task to a person with early access\n2. Don't configure `/path/to/mumble-mcp` from the docs. It is a placeholder, and no binary is published\n3. If the person already has Mumble, read ~/Mumble/\u003ccapture\u003e/ directly, `capture.json` for the transcript and `diagram.canvas` for the map\n4. Keep canvas keys in schema order and never rename a node id, or the edges that name it are orphaned and the canvas is refused. Use git as the undo\n5. Don't write to a capture that is being recorded. The app doesn't merge the two versions\n\n## Questions\n\n### Which is better for AI agents, Mermaid Chart MCP or Mumble?\n\nMermaid Chart MCP scores 31.4 (F) on agent readiness against Mumble's 7.5 (F), and leads in every scored category.\n\n### Can an agent call Mermaid Chart MCP and Mumble without installing anything?\n\nMermaid Chart MCP has a hosted endpoint at https://mcp.mermaid.ai/mcp. No hosted endpoint is listed for Mumble.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/mermaid-chart-vs-mumble.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mermaid-chart-vs-mumble.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"mermaid-chart\", \"b\": \"mumble\"}`. From a terminal: `anchor compare mermaid-chart mumble`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/mermaid-chart.json and https://www.anchorterminal.com/api/v1/tools/mumble.json\n\n## Other comparisons with Mermaid Chart MCP or Mumble\n\n- [Cloudviz API vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/cloudviz-vs-mermaid-chart.md)\n- [Cloudviz API vs Mumble](https://www.anchorterminal.com/compare/cloudviz-vs-mumble.md)\n- [D2 vs Mumble](https://www.anchorterminal.com/compare/d2-vs-mumble.md)\n- [Diagrams.so API + MCP vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/diagrams-so-vs-mermaid-chart.md)\n- [Diagrams.so API + MCP vs Mumble](https://www.anchorterminal.com/compare/diagrams-so-vs-mumble.md)\n- [draw.io + MCP vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/drawio-vs-mermaid-chart.md)\n- [draw.io + MCP vs Mumble](https://www.anchorterminal.com/compare/drawio-vs-mumble.md)\n- [Eraser API + MCP vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/eraser-vs-mermaid-chart.md)\n- [Eraser API + MCP vs Mumble](https://www.anchorterminal.com/compare/eraser-vs-mumble.md)\n- [ExcaliClaw vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/excaliclaw-vs-mermaid-chart.md)\n- [ExcaliClaw vs Mumble](https://www.anchorterminal.com/compare/excaliclaw-vs-mumble.md)\n- [Excalidraw vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/excalidraw-vs-mermaid-chart.md)\n- [Excalidraw vs Mumble](https://www.anchorterminal.com/compare/excalidraw-vs-mumble.md)\n- [Kroki vs Mumble](https://www.anchorterminal.com/compare/kroki-vs-mumble.md)\n- [Lucid API + MCP vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/lucid-vs-mermaid-chart.md)\n- [Lucid API + MCP vs Mumble](https://www.anchorterminal.com/compare/lucid-vs-mumble.md)\n- [Mermaid Chart MCP vs Mural MCP](https://www.anchorterminal.com/compare/mermaid-chart-vs-mural-mcp.md)\n- [Mermaid Chart MCP vs PlantUML](https://www.anchorterminal.com/compare/mermaid-chart-vs-plantuml.md)\n- [Mermaid Chart MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/mermaid-chart-vs-structurizr.md)\n- [Mermaid Chart MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/mermaid-chart-vs-tldraw.md)\n- [Mermaid Chart MCP vs Whimsical MCP](https://www.anchorterminal.com/compare/mermaid-chart-vs-whimsical.md)\n- [Mumble vs Mural MCP](https://www.anchorterminal.com/compare/mumble-vs-mural-mcp.md)\n- [Mumble vs PlantUML](https://www.anchorterminal.com/compare/mumble-vs-plantuml.md)\n- [Mumble vs Structurizr + MCP](https://www.anchorterminal.com/compare/mumble-vs-structurizr.md)\n- [Mumble vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/mumble-vs-tldraw.md)\n- [Mumble vs Whimsical MCP](https://www.anchorterminal.com/compare/mumble-vs-whimsical.md)\n- [D2 vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/d2-vs-mermaid-chart.md)\n- [Kroki vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/kroki-vs-mermaid-chart.md)\n\n## Disclosure\n\n- Mumble is made by tiny space, the company of Quynh Tran-Thanh, a founder of Anchor Terminal. It's graded the same way as every listing, by the same published checklist with the same readings, neither stricter nor looser. Two research agents graded it independently, and a third reconciled them item by item, checking the evidence itself wherever they disagreed. letme never picks it.\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-14", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run", "terms": "https://www.anchorterminal.com/terms/#data" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Mermaid Chart MCP vs Mumble", "url": "" } ], "description": "Mermaid Chart MCP scores 31.4 (F) to Mumble's 7.5 (F) for diagram creation. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Mermaid Chart MCP F 31.4", "Mumble F 7.5", "scores" ], "h1": "Mermaid Chart MCP vs Mumble", "image": "https://www.anchorterminal.com/assets/og/compare-mermaid-chart-vs-mumble.png", "path": "/compare/mermaid-chart-vs-mumble", "published": "2026-10-01", "section": "tools", "title": "Mermaid Chart MCP vs Mumble for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-10-14", "url": "https://www.anchorterminal.com/compare/mermaid-chart-vs-mumble" }, "tokens": { "markdown": 2600, "slim": 730 }, "version": 1 }