{ "data": { "a": { "slug": "ai-diagram-maker-mcp", "name": "AI Diagram Maker MCP", "vendor": "AI Diagram Maker (Rajasekar Elango)", "vendorUrl": "https://www.aidiagrammaker.com", "kind": "mcp", "category": "diagramming", "summary": "AI Diagram Maker MCP is an MIT-licensed MCP server, hosted or run with npx, that sends text, JSON, ASCII art, images or Mermaid to the AI Diagram Maker service and returns a D2 software diagram with an edit link.", "url": "https://www.anchorterminal.com/tools/ai-diagram-maker-mcp", "markdownUrl": "https://www.anchorterminal.com/tools/ai-diagram-maker-mcp.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/ai-diagram-maker-mcp.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/ai-diagram-maker-mcp.json", "dns": "ai-diagram-maker-mcp.grade.anchorterminal.com", "repo": "https://github.com/erajasekar/ai-diagram-maker-mcp", "license": "MIT for the MCP server. The AI Diagram Maker service it calls is closed, under terms last updated 24 September 2025", "transports": [ "streamable-http", "stdio" ], "remoteUrl": "https://mcp.aidiagrammaker.com/mcp", "packages": [ { "registry": "npm", "name": "ai-diagram-maker-mcp" } ], "auth": "api-key", "authNotes": "An API key created in the AI Diagram Maker app under Settings \u003e API Keys, shown once, named, and deactivated, reactivated or deleted from the same page. No scopes; the user guide says anyone with the key can access the account. The hosted server takes it in `X-ADM-API-Key` or `Authorization: Bearer`, the local server in `ADM_API_KEY`. No OAuth.", "pricing": "freemium", "pricingNotes": "Basic is free with 50 AI credits a month. Plus $10 a month ($96 a year) with 250 credits, Max $20 a month ($192 a year) with 500. One credit is 1,000 tokens, and extra credits can't be bought. Which plans include API and MCP use isn't stated.", "priceSummary": "$10 / mo", "where": "both", "x402": { "level": "no", "evidence": "Plans sold through Lemon Squeezy checkout links. No x402, MPP or L402 in the repository, the OpenAPI file or the site (checked 2026-11-06). Out of credits returns 402 with no payment requirements.", "endpoints": [] }, "toolCount": 5, "popularity": { "githubStars": null, "npmWeekly": 63, "pypiWeekly": null, "asOf": "2026-11-06" }, "docsUrl": "https://github.com/erajasekar/ai-diagram-maker-mcp#readme", "openapi": "https://github.com/erajasekar/ai-diagram-maker-mcp/blob/main/apispec/adm-openapi.json", "registryName": "io.github.erajasekar/ai-diagram-maker-mcp", "capabilities": [ "diagram.create", "diagram.architecture", "diagram.as-code", "diagram.export" ], "tags": [ "hosted", "local", "mcp", "remote-mcp", "stdio", "mcp-registry", "openapi", "api-key", "freemium", "d2", "mcp-apps" ], "lastRelease": "2026-04-10", "graded": true, "anchor": { "graded": true, "score": 43.8, "grade": "E", "agentReady": false, "rank": 1225, "ranked": true, "rankOf": 1486, "categoryRank": 13, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 66, "maintenance": 17, "payments": 20, "reliability": 30, "schema": 75, "security": 45, "transparency": 35 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-06" }, "negative": 0, "verdict": "Five compact, typed tools turn text, JSON, ASCII art, images or Mermaid into an editable D2 diagram, and the API documents its error and rate-limit responses. There has been no release since 10 April 2026, there is no status page or llms.txt, and the API key opens the whole account with no scopes.", "bestFor": "Quick architecture, sequence, ERD and flowchart diagrams from a coding agent, with a link to edit them.", "strengths": [ "Five tools with zod schemas, a diagramType enum and descriptions that say when to use each", "OpenAPI 3 file for the generate endpoint with documented 402, 422 and 429 responses", "A 429 body gives limit, remaining, resetAt and retryAfter", "Hosted endpoint with nothing to install, or a local npx server", "Output stays editable as D2 in the app and exports to SVG, PNG or Mermaid" ], "weaknesses": [ "Last release 3.0.8 on 10 April 2026, and the registry entry still says 1.0.0", "No status page, SLA, llms.txt, changelog or security policy found", "API keys have no scopes and give full account access", "Plans don't say whether API and MCP calls are included, and an open issue asks how hosted MCP credits are counted", "The privacy policy names no AI model providers or other processors" ], "agentNotes": [ "Send the key in the `X-ADM-API-Key` header to https://mcp.aidiagrammaker.com/mcp, never in the URL", "Pick `diagramType` from the enum when the user names one; leave it out to let the service choose", "On a 402 stop and tell the user credits are gone; they reset monthly and can't be topped up", "On a 429 wait for `retryAfter` seconds before the next call", "Give the user the returned diagram link so they can edit it, since the tools can't revise an existing diagram" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "E", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 43.8 } ], "editorialScores": { "ergonomics": 66, "maintenance": 17, "payments": 20, "reliability": 30, "schema": 75, "security": 45, "transparency": 28 }, "provenanceScore": 42, "checked": { "categories": { "ergonomics": "2026-11-06", "maintenance": "2026-11-06", "payments": "2026-11-06", "reliability": "2026-11-06", "schema": "2026-11-06", "security": "2026-11-06", "transparency": "2026-11-06" }, "last": "2026-11-06", "oldest": "2026-11-06", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "ADM_API_KEY=your_api_key npx ai-diagram-maker-mcp@latest", "claudeCode": "claude mcp add ai-diagram-maker -t stdio -e ADM_API_KEY=\u003capi_key\u003e -- npx -y ai-diagram-maker-mcp@latest", "config": { "mcpServers": { "ai-diagram-maker": { "headers": { "X-ADM-API-Key": "YOUR_API_KEY" }, "url": "https://mcp.aidiagrammaker.com/mcp" } } } }, "letme": { "capability": "https://letme.dev/diagram.create", "tool": "https://letme.dev/ai-diagram-maker-mcp" }, "area": "design-diagrams", "unitPrices": [ { "item": "Plus plan", "unit": "month", "usd": 10, "note": "250 AI credits a month; $96 billed yearly" }, { "item": "Max plan", "unit": "month", "usd": 20, "note": "500 AI credits a month; $192 billed yearly" } ], "provenance": { "legalEntity": "", "domain": "aidiagrammaker.com", "domainRegistered": "2025-08-21", "endpointOnVendorDomain": true, "terms": "https://www.aidiagrammaker.com/terms", "privacy": "https://www.aidiagrammaker.com/privacy", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-11-06", "notes": [ "The terms and privacy policy, both last updated 24 September 2025, name the company only as AI Diagram Maker, under United States law, with aidiagrammaker@gmail.com as the contact. The npm package names Rajasekar Elango as author.", "The terms list scraping among prohibited uses. Public pages were read as data.", "www.aidiagrammaker.com/robots.txt allows all paths.", "RDAP gives aidiagrammaker.com a registration date of 21 August 2025.", "/.well-known/security.txt returns 404. No status page or changelog found; the GitHub releases are the only dated record." ], "score": 42 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/ai-diagram-maker-mcp.json", "live": { "slug": "ai-diagram-maker-mcp", "probe": { "target": "https://mcp.aidiagrammaker.com/mcp", "method": "mcp-initialize", "lastAt": "2026-11-07T18:20:09.018580127Z", "lastOk": false, "lastStatus": 0, "lastMs": 0, "lastNote": "TLS certificate problem", "authRequired": false, "uptime24h": 0, "uptime30d": 0, "p50ms24h": 0, "p95ms24h": 0, "samples24h": 200, "samples30d": 200, "days": [ { "date": "2026-11-06", "probes": 13, "ok": 0 }, { "date": "2026-11-07", "probes": 187, "ok": 0 } ], "outages": [ { "start": "2026-11-06T22:45:03.399368446Z", "end": "0001-01-01T00:00:00Z", "note": "TLS certificate problem" } ] }, "versions": [ { "registry": "mcp-registry", "name": "io.github.erajasekar/ai-diagram-maker-mcp", "version": "1.0.0", "seenAt": "2026-11-07T18:16:28.95801333Z" }, { "registry": "npm", "name": "ai-diagram-maker-mcp", "version": "3.0.8", "seenAt": "2026-11-06T23:04:20.113009064Z" } ], "githubStars": 10, "npmWeekly": 63, "securityTxt": { "url": "https://aidiagrammaker.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:00:48.542497373Z" }, "pages": [ { "url": "https://www.aidiagrammaker.com/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:24:25.783359417Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "40a879ba4963" }, { "url": "https://www.aidiagrammaker.com/terms", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:24:27.95923952Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "9b4e6f213ed0" } ], "mcpTools": { "url": "https://mcp.aidiagrammaker.com/mcp", "checkedAt": "2026-11-07T01:42:20.967941233Z", "status": "error", "note": "Post \"https://mcp.aidiagrammaker.com/mcp\": tls: failed to verify certificate: x509: certificate is valid for *.up.railway.app, up.railway.app, not mcp.aidiagrammaker.com", "changedAt": "2026-11-07T01:42:20.967941233Z" }, "updatedAt": "2026-11-07T18:20:09.018580127Z" } }, "answer": "Structurizr + MCP scores 61 (C) on agent readiness against AI Diagram Maker MCP's 43.8 (E), and leads in 4 of 7 scored categories. AI Diagram Maker MCP leads on schema \u0026 documentation and agent ergonomics.", "b": { "slug": "structurizr", "name": "Structurizr + MCP", "vendor": "Structurizr", "vendorUrl": "https://structurizr.com", "kind": "http-api", "category": "diagramming", "summary": "Diagram-as-code tool for software architecture using the C4 model.", "url": "https://www.anchorterminal.com/tools/structurizr", "markdownUrl": "https://www.anchorterminal.com/tools/structurizr.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/structurizr.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/structurizr.json", "dns": "structurizr.grade.anchorterminal.com", "repo": "https://github.com/structurizr/structurizr", "license": "Apache-2.0", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://mcp.structurizr.com/mcp", "packages": [], "auth": "mixed", "authNotes": "The workspace API on a Structurizr server takes a per-workspace key in the X-Authorization header, and listing all workspaces needs the admin API key. Server authentication can be switched off. The hosted MCP at mcp.structurizr.com needs no key.", "pricing": "freemium", "pricingNotes": "The DSL, local, the playground and the MCP server are free and Apache 2.0. Running the server from the prebuilt binaries needs a yearly licence priced by unique users (people or automated processes) per installation, from £300 a month for 1 to 20 users up to £2,400 a month for over 1,000, billed annually and bought by email, paid by bank transfer or PayPal invoice. 14-day trial licence from trial.structurizr.com. Building the server from source needs no licence. The cloud service took no new sign-ups after 31 December 2025 and shut down on 30 September 2026 (https://docs.structurizr.com/server/pricing).", "priceSummary": "$400 / mo", "where": "hosted", "x402": { "level": "no", "endpoints": [] }, "toolCount": 6, "popularity": { "githubStars": 419, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://docs.structurizr.com", "openapi": "https://raw.githubusercontent.com/structurizr/structurizr/refs/heads/main/structurizr-json/structurizr.yaml", "capabilities": [ "diagram.create", "diagram.as-code", "diagram.edit", "diagram.export", "diagram.architecture" ], "tags": [ "open-source", "self-hosted", "local", "hosted", "mcp", "diagram-as-code", "openapi", "free-tier" ], "lastRelease": "2026-10-26", "graded": true, "anchor": { "graded": true, "score": 61, "grade": "C", "agentReady": false, "rank": 624, "ranked": true, "rankOf": 1486, "categoryRank": 6, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 55, "maintenance": 88, "payments": 50, "reliability": 70, "schema": 61, "security": 43, "transparency": 76 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-04" }, "negative": 0, "verdict": "One text model generates several C4 architecture views, and the project shipped four releases between 17 September and 26 October 2026. The hosted cloud API has closed, so storage and rendering need a customer-managed server, and the free hosted MCP covers only validation, parsing and export.", "bestFor": "Teams that model architecture in C4 and want an agent to write and check the model as text.", "strengths": [ "One text model yields context, container, component, dynamic and deployment views", "Free hosted MCP at mcp.structurizr.com validates, parses, inspects and exports DSL with no key", "Apache 2.0 code, an OpenAPI 3.0 definition and dated changelogs", "Application 2026.10.26 and library v6.2.4 on 26 October 2026, with reported issues fixed within weeks", "Nine months' dated notice before the cloud service shut down" ], "weaknesses": [ "The hosted cloud API is gone. Storage and rendering need your own server", "Prebuilt server binaries need a paid licence counted per unique user, including API clients", "The released MCP module is labelled experimental, with one-line tool descriptions", "Self-hosted MCP server tools take the workspace API key as a tool argument", "No security.txt or disclosure policy, and one maintainer wrote every commit since February" ], "agentNotes": [ "Call `validate` and then `inspect` on the DSL before pushing a workspace", "Use the Mermaid export when the diagram has to render in Markdown without a Structurizr server", "Export needs a view key. Parse the DSL first to list the views", "Run the `structurizr/mcp` image with only the flags you need, such as `-dsl -server-read`, to keep write and delete tools out of reach", "The workspace API returns JSON, never images. PNG and SVG come from the separate export command" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 61 } ], "editorialScores": { "ergonomics": 55, "maintenance": 88, "payments": 50, "reliability": 70, "schema": 61, "security": 43, "transparency": 80 }, "provenanceScore": 72, "checked": { "categories": { "ergonomics": "2026-11-04", "maintenance": "2026-11-04", "payments": "2026-11-04", "reliability": "2026-11-04", "schema": "2026-11-04", "security": "2026-11-04", "transparency": "2026-11-04" }, "last": "2026-11-04", "lastMoved": "2026-11-04", "oldest": "2026-11-04", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl \"$STRUCTURIZR_URL/api/workspace/1\" -H \"X-Authorization: $STRUCTURIZR_API_KEY\"", "claudeCode": "claude mcp add --transport http structurizr https://mcp.structurizr.com/mcp", "config": { "mcpServers": { "structurizr": { "url": "https://mcp.structurizr.com/mcp" } } } }, "letme": { "capability": "https://letme.dev/diagram.create", "tool": "https://letme.dev/structurizr" }, "area": "design-diagrams", "unitPrices": [ { "item": "Server licence, 1 to 20 users", "unit": "month", "usd": 400, "note": "£300 a month billed annually, converted at about $1.34 a pound" }, { "item": "Server licence, 21 to 50 users", "unit": "month", "usd": 800, "note": "£600 a month billed annually, converted at about $1.34 a pound" } ], "provenance": { "legalEntity": "Structurizr Limited", "domain": "structurizr.com", "domainRegistered": "2013-11-04", "endpointOnVendorDomain": true, "terms": "https://docs.structurizr.com/server/terms-and-conditions", "privacy": "https://docs.structurizr.com/server/privacy-policy", "statusPage": "", "changelog": "https://github.com/structurizr/structurizr/blob/main/changelog-application.md", "securityTxt": "none", "checked": "2026-11-04", "notes": [ "Structurizr Limited is a private company registered in Jersey, Channel Islands, Jersey Financial Services Commission registry number 303857 (server EULA)", "The Pingdom status page linked from structurizr.com monitored the cloud service, which shut down on 30 September 2026, so it isn't listed", "structurizr.com/terms-and-conditions and structurizr.com/privacy-policy answer HTTP 404 (8 October and 4 November 2026); the server terms (last updated 12 October 2026, reseller changes taking effect on 14 November 2026) and privacy policy live on docs.structurizr.com", "structurizr.com's robots.txt carries only Cloudflare's content-signal preamble, with no rules and no Content-Signal line (4 November 2026)" ], "score": 72 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/structurizr.json", "live": { "slug": "structurizr", "probe": { "target": "https://mcp.structurizr.com/mcp", "method": "get", "lastAt": "2026-11-07T18:20:57.497107908Z", "lastOk": true, "lastStatus": 405, "lastMs": 112, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 84, "p95ms24h": 165, "samples24h": 239, "samples30d": 7910, "days": [ { "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": 249, "ok": 249 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 252 }, { "date": "2026-10-17", "probes": 253, "ok": 253 }, { "date": "2026-10-18", "probes": 256, "ok": 256 }, { "date": "2026-10-19", "probes": 255, "ok": 255 }, { "date": "2026-10-20", "probes": 252, "ok": 252 }, { "date": "2026-10-21", "probes": 253, "ok": 253 }, { "date": "2026-10-22", "probes": 253, "ok": 253 }, { "date": "2026-10-23", "probes": 248, "ok": 248 }, { "date": "2026-10-24", "probes": 251, "ok": 251 }, { "date": "2026-10-25", "probes": 250, "ok": 250 }, { "date": "2026-10-26", "probes": 252, "ok": 252 }, { "date": "2026-10-27", "probes": 249, "ok": 249 }, { "date": "2026-10-28", "probes": 250, "ok": 250 }, { "date": "2026-10-29", "probes": 249, "ok": 249 }, { "date": "2026-10-30", "probes": 249, "ok": 249 }, { "date": "2026-10-31", "probes": 251, "ok": 251 }, { "date": "2026-11-01", "probes": 249, "ok": 249 }, { "date": "2026-11-02", "probes": 250, "ok": 250 }, { "date": "2026-11-03", "probes": 248, "ok": 248 }, { "date": "2026-11-04", "probes": 246, "ok": 246 }, { "date": "2026-11-05", "probes": 185, "ok": 185 }, { "date": "2026-11-06", "probes": 241, "ok": 241 }, { "date": "2026-11-07", "probes": 187, "ok": 187 } ] }, "versions": [ { "registry": "github", "name": "structurizr/structurizr", "version": "v2026.10.26", "released": "2026-10-26", "seenAt": "2026-11-07T00:09:07.44736872Z" } ], "githubStars": 522, "securityTxt": { "url": "https://structurizr.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:02:02.542391074Z" }, "domain": { "domain": "structurizr.com", "registered": "2013-11-04", "source": "https://rdap.verisign.com/com/v1/domain/structurizr.com", "checkedAt": "2026-11-01T14:27:14.977786796Z" }, "pages": [ { "url": "https://raw.githubusercontent.com/structurizr/structurizr/main/changelog-application.md", "kind": "changelog", "status": 304, "checkedAt": "2026-11-07T14:23:39.022688036Z", "changedAt": "2026-10-31T06:23:05.230270799Z", "fingerprint": "ece9660733d9" }, { "url": "https://docs.structurizr.com/cloud", "kind": "deprecations", "status": 304, "checkedAt": "2026-11-07T14:08:12.043923941Z", "changedAt": "2026-10-26T03:15:39.821096875Z", "fingerprint": "03534150a5bf" }, { "url": 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"url": "https://mcp.structurizr.com/mcp", "checkedAt": "2026-11-07T01:48:09.676756442Z", "status": "ok", "note": "answered without the initialize handshake", "tools": [ { "name": "inspect", "title": "Inspect a Structurizr DSL workspace", "description": "Inspects a Structurizr DSL workspace", "inputSchema": { "properties": { "dsl": { "description": "DSL", "type": "string" } }, "required": [ "dsl" ], "type": "object" }, "annotations": { "destructiveHint": true, "idempotentHint": false, "openWorldHint": true, "readOnlyHint": false, "title": "" } }, { "name": "parse", "title": "Parse a Structurizr DSL workspace", "description": "Parses a Structurizr DSL workspace", "inputSchema": { "properties": { "dsl": { "description": "DSL", "type": "string" } }, "required": [ "dsl" ], "type": "object" }, "annotations": { "destructiveHint": true, "idempotentHint": false, "openWorldHint": true, "readOnlyHint": false, "title": "" } }, { "name": "validate", "title": "Validate a Structurizr DSL workspace", "description": "Validates a Structurizr DSL workspace", "inputSchema": { "properties": { "dsl": { "description": "DSL", "type": "string" } }, "required": [ "dsl" ], "type": "object" }, "annotations": { "destructiveHint": true, "idempotentHint": false, "openWorldHint": true, "readOnlyHint": false, "title": "" } }, { "name": "export-mermaid", "title": "Exports Structurizr views to Mermaid", "description": "Exports Structurizr views to Mermaid", "inputSchema": { "properties": { "dsl": { "description": "DSL", "type": "string" }, "viewKey": { "description": "View key", "type": "string" } }, "required": [ "dsl", "viewKey" ], "type": "object" }, "annotations": { "destructiveHint": true, "idempotentHint": false, "openWorldHint": true, "readOnlyHint": false, "title": "" } }, { "name": "export-c4plantuml", "title": "Exports Structurizr views to C4-PlantUML", "description": "Exports Structurizr views to C4-PlantUML", "inputSchema": { "properties": { "dsl": { "description": "DSL", "type": "string" }, "viewKey": { "description": "View key", "type": "string" } }, "required": [ "dsl", "viewKey" ], "type": "object" }, "annotations": { "destructiveHint": true, "idempotentHint": false, "openWorldHint": true, "readOnlyHint": false, "title": "" } }, { "name": "export-plantuml", "title": "Exports Structurizr views to PlantUML", "description": "Exports Structurizr views to PlantUML", "inputSchema": { "properties": { "dsl": { "description": "DSL", "type": "string" }, "viewKey": { "description": "View key", "type": "string" } }, "required": [ "dsl", "viewKey" ], "type": "object" }, "annotations": { "destructiveHint": true, "idempotentHint": false, "openWorldHint": true, "readOnlyHint": false, "title": "" } } ], "schemaTokens": 569, "changedAt": "2026-11-07T01:48:09.676756442Z", "check": { "checker": "anchor-check/1.0", "totalTokens": 569, "counts": { "error": 0, "note": 1, "warn": 3 }, "findings": [ { "rule": "TC06", "severity": "warn", "tool": "export-c4plantuml", "message": "the description is \"Exports Structurizr views to C4-PlantUML\"", "fix": "Add when to use it, what it returns and any side effect, in two or three sentences." }, { "rule": "TC06", "severity": "warn", "tool": "export-mermaid", "message": "the description is \"Exports Structurizr views to Mermaid\"", "fix": "Add when to use it, what it returns and any side effect, in two or three sentences." }, { "rule": "TC06", "severity": "warn", "tool": "export-plantuml", "message": "the description is \"Exports Structurizr views to PlantUML\"", "fix": "Add when to use it, what it returns and any side effect, in two or three sentences." }, { "rule": "TC24", "severity": "note", "message": "6 of 6 tools have no outputSchema", "fix": "Declare outputSchema for tools that return structured data, and return structuredContent that matches it." } ] } }, "github": { "repo": "structurizr/structurizr", "checkedAt": "2026-11-02T09:28:46.180000607Z", "stars": 512, "archived": false, "issuesEnabled": true, "pushedAt": "2026-10-31T08:54:48Z", "openIssues": 1, "openPRs": 0, "issuesOpened90d": 8, "issuesClosed90d": 9, "prsMerged90d": 0, "ci": { "branch": "main", "runs": 50, "success": 50, "failure": 0, "other": 0, "latest": "success", "latestAt": "2026-10-31T08:56:30Z" }, "replies": { "sampled": 25, "unanswered": 1, "medianDays": 0.4 } }, "updatedAt": "2026-11-07T18:20:57.497107908Z" } }, "edges": [ { "by": 71, "category": "maintenance", "leads": "structurizr", "name": "Maintenance \u0026 community", "reasons": { "a": "Last release v3.0.8, published to npm on 10 April 2026, 210 days before this check (0). No release since 8 August (0). Four issues in all. The two open ones, from 4 May (hosted MCP credit usage) and 13 October 2026, show no reply, and one closed issue had a comment (5 of 25). In the official MCP registry under the GitHub-verified namespace io.github.erajasekar, but the entry is 1.0.0 from 19 March 2026 while npm is on 3.0.8 (10 of 15). The only workflow publishes to the registry. No tests or CI, and the MCP SDK floor is ^1.9.0 (2 of 10). 0 + 0 + 5 + 10 + 2 = 17.", "b": "Application release 2026.10.26 and library v6.2.4 on 26 October 2026, 9 days before this check (30). Four releases since 6 August (library v6.2.3 on 17 September, application 2026.09.19, application 2026.10.26 and library v6.2.4), each fixing a named issue (20). Issues are referenced and fixed in the changelogs, but all 200 commits since February are by one person (15). Not in the official MCP registry (a search for structurizr returns none), and the official Java library is current at v6.2.4 (15). CI on every push and Docker base images bumped on 26 October (8). 30+20+15+15+8 = 88." }, "scores": { "a": 17, "b": 88 } }, { "by": 41, "category": "transparency", "leads": "structurizr", "name": "Transparency \u0026 trust", "reasons": { "a": "The MCP server is MIT (package.json and LICENSE, added 18 March 2026). The service is closed, under terms last updated 24 September 2025 that name the operator only as AI Diagram Maker (20 of 30). The privacy policy of the same date keeps diagrams, revisions and chat prompts and responses 'as long as necessary', and the terms license user input 'to provide and improve our services', with no retention periods and no word on model training or the AI providers used (8 of 30). No deprecation policy or dated notices (0). No subprocessors or data locations named (0). The MCP server's source sends no telemetry of its own. 20 + 8 + 0 + 0 = 28.", "b": "Apache 2.0, and the prebuilt binaries add a EULA (28). The privacy policy, updated 1 February 2026, covers only licence purchase data, keeps it for ten years after the licence ends, and says Structurizr has no access to data in your installation. The hosted MCP isn't covered (20). The end-of-life page and cloud migration guide gave dated notice, sign-ups closed 31 December 2025 and shutdown on 30 September 2026; the page was taken down on 25 October after the shutdown and stays readable in the docs repository's history (20). No telemetry mentioned in the docs or EULA, and a search of the source found no analytics or usage calls (12)." }, "scores": { "a": 35, "b": 76 } }, { "by": 40, "category": "reliability", "leads": "structurizr", "name": "Reliability", "reasons": { "a": "Hosted lines, because every tool call is generated on the AI Diagram Maker service, through the hosted endpoint or the npx server. No status page found on the site or in the README (0). No readable incident history (5). The only rate-limit number is the example in the OpenAPI 429 schema ('Maximum 100 requests per day exceeded.'), which isn't stated as the limit (5 of 15). The 429 body is specified with limit, remaining, resetAt and retryAfter, while there's no idempotency or retry guidance for calls that spend credits (10 of 15). No SLA found (0). Nothing labels the service or server beta (10). 0 + 5 + 5 + 10 + 0 + 10 = 30.", "b": "The hosted cloud API shut down on 30 September 2026, so what an agent calls now is a server you run plus a small hosted MCP, and we used the self-hosted checklist. Prebuilt binaries and Docker images with Java 21 stated (20). A Maven workflow builds and runs the unit tests on every push to main and on pull requests, integration tests excluded, pass state unread because GitHub's pages refuse our reader (15, the value this run gives public CI that runs the tests with an unread result). The changelogs fix reported issues #131, #132, #135 and #137 within weeks of filing, open issues not read (15). Date-stamped application releases and a semver library (v6.2.4), each with a changelog (12). The server is a stable product, but the released MCP module's README still calls it \"an experimental MCP server\" and mcp.structurizr.com has no status page or published limits (8). 20+15+15+12+8 = 70." }, "scores": { "a": 30, "b": 70 } }, { "by": 30, "category": "payments", "leads": "structurizr", "name": "Payments \u0026 pricing", "reasons": { "a": "No x402, MPP or L402 (0). Plan prices are public (Plus $10, Max $20 a month), with credits counted at 1,000 tokens each, so there's no per-diagram price (10 of 20). Basic is free forever with 50 credits a month, but the page doesn't say whether a card is needed or whether API and MCP calls are included (10 of 20, half as with an unstated card rule). A person signs up in the app and creates the key (0). 0 + 10 + 10 + 0 = 20.", "b": "Apache 2.0 code with a paid option, the licence for prebuilt binaries. No payment protocol (0). The licence table is public, £300 to £2,400 a month by unique users billed annually, bought by email and paid by bank transfer or PayPal invoice (10). Building from source is free, and a 14-day trial licence comes from trial.structurizr.com with no payment (20). The hosted MCP needs no key and the local tools need no signup (20)." }, "scores": { "a": 20, "b": 50 } }, { "by": 14, "category": "schema", "leads": "ai-diagram-maker-mcp", "name": "Schema \u0026 documentation", "reasons": { "a": "All five tools have zod input schemas in src/tools, and the repository ships an OpenAPI 3 file for POST /api/v2/diagrams/generate (25). No llms.txt (404) and no docs site for agents beyond the README (0). Each description says what the tool does and when to use it, listing trigger phrases and the diagram types, without saying when another tool fits better (16 of 20). `content` has a minimum length and `diagramType` an eight-value enum; the OpenAPI adds `inputType` and `format` enums (13 of 15). Examples in the parameter descriptions and README, and the OpenAPI documents 400, 401, 402, 422 (D2 failed to compile) and 429 with typed error bodies (13 of 15). Git tags from v1.1.1 to v3.0.8 and a /api/v2 path, with no changelog or release notes (8 of 15). 25 + 0 + 16 + 13 + 13 + 8 = 75.", "b": "OpenAPI 3.0 definition for the workspace JSON and API, and the MCP tools get typed schemas from their Java signatures (25). No llms.txt found (0). Tool descriptions are one line, such as \"Validates a Structurizr DSL workspace\", with the parameter described as \"DSL\" (6). Required flags and a numeric workspace ID, no enums (8). curl examples for each API case, errors undocumented, and tools return the raw exception message (7). Dated changelogs for the application and the library (15)." }, "scores": { "a": 75, "b": 61 } }, { "by": 11, "category": "ergonomics", "leads": "ai-diagram-maker-mcp", "name": "Agent ergonomics", "reasons": { "a": "Five compact tools (25). Output can be SVG or PNG and the API can return the D2 source with `debug`, but there's nothing to page or trim, and results carry the rendered image (10 of 20). Typed error bodies with codes, a 422 that returns the failing D2 code, and retryAfter on 429 (16 of 20). No readOnlyHint or other annotations in the source and no idempotency key, and every call spends credits (5 of 20). Only `content` is required and the hosted endpoint needs no install, but there is no SDK beyond the server (10 of 15). 25 + 10 + 16 + 5 + 10 = 66.", "b": "Six compact tools on the hosted MCP, and the self-hosted image enables tool groups by flag (`-dsl`, `-server-read`, `-server-update` and so on) (25). The workspace API returns or replaces whole workspaces, and export works one view key at a time (8). Errors come back as exception text, and API errors aren't documented (8). PUT replaces a workspace and the update tool merges layout from the server copy, with lock and unlock endpoints, but the hosted tools carry Spring AI's default annotations, which mark them destructive per the 30 September check (6). Official Java client library, no second language (8)." }, "scores": { "a": 66, "b": 55 } } ], "facts": [ { "a": "MCP server", "b": "HTTP API", "name": "Kind" }, { "a": "AI Diagram Maker (Rajasekar Elango)", "b": "Structurizr", "name": "Vendor" }, { "a": "https://mcp.aidiagrammaker.com/mcp", "b": "https://mcp.structurizr.com/mcp", "name": "Hosted endpoint" }, { "a": "Streamable HTTP, stdio", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "API key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT for the MCP server. The AI Diagram Maker service it calls is closed, under terms last updated 24 September 2025", "b": "Apache-2.0", "name": "Licence" }, { "a": "5", "b": "6", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "no", "b": "no", "name": "llms.txt" }, { "a": "io.github.erajasekar/ai-diagram-maker-mcp", "b": "not listed", "name": "MCP registry" }, { "a": "2026-04-10", "b": "2026-10-26", "name": "Last release" }, { "a": "2025-09-24", "b": "not read yet", "name": "Terms last updated" }, { "a": "2025-09-24", "b": "not read yet", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not read yet", "name": "Customer content may train models" }, { "a": "yes", "b": "not read yet", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not read yet", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not read yet", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "not read yet", "name": "Arbitration or class-action waiver" }, { "a": "63 npm/wk", "b": "419 stars", "name": "Popularity" }, { "a": "none", "b": "3/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "Structurizr + MCP scores 61 (C) on agent readiness against AI Diagram Maker MCP's 43.8 (E), and leads in 4 of 7 scored categories. AI Diagram Maker MCP leads on schema \u0026 documentation and agent ergonomics.", "question": "Which is better for AI agents, AI Diagram Maker MCP or Structurizr + MCP?" }, { "answer": "AI Diagram Maker MCP needs an API key. Structurizr + MCP takes an API key or an OAuth sign-in.", "question": "Do AI Diagram Maker MCP and Structurizr + MCP need an API key?" }, { "answer": "Yes. AI Diagram Maker MCP has a hosted endpoint at https://mcp.aidiagrammaker.com/mcp and Structurizr + MCP at https://mcp.structurizr.com/mcp.", "question": "Can an agent call AI Diagram Maker MCP and Structurizr + MCP without installing anything?" }, { "answer": "No open-source release is listed for AI Diagram Maker MCP. Structurizr + MCP is open source (Apache-2.0).", "question": "Are AI Diagram Maker MCP and Structurizr + MCP open source?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 75 against 61", "Agent ergonomics, 66 against 55" ], "also": [ "Runs on your own machine" ], "goodFor": "Quick architecture, sequence, ERD and flowchart diagrams from a coding agent, with a link to edit them.", "slug": "ai-diagram-maker-mcp", "watchFor": "Last release 3.0.8 on 10 April 2026, and the registry entry still says 1.0.0" }, { "aheadOn": [ "Reliability, 70 against 30", "Payments \u0026 pricing, 50 against 20", "Maintenance \u0026 community, 88 against 17", "Transparency \u0026 trust, 76 against 35" ], "also": [ "Open source" ], "goodFor": "Teams that model architecture in C4 and want an agent to write and check the model as text.", "slug": "structurizr", "watchFor": "The hosted cloud API is gone. Storage and rendering need your own server" } ], "history": { "ai-diagram-maker-mcp": null, "structurizr": [ { "causes": [ "product", "correction" ], "date": "2026-11-04", "delta": 0.9, "from": 60.1, "fromGrade": "C", "to": 61, "toGrade": "C" }, { "causes": [ "evidence" ], "date": "2026-10-27", "delta": 0.2, "from": 59.9, "fromGrade": "C", "to": 60.1, "toGrade": "C" }, { "causes": [ "method" ], "date": "2026-10-08", "delta": -0.3, "from": 60.2, "fromGrade": "C", "to": 59.9, "toGrade": "C" } ] }, "job": { "capability": "diagram.create", "name": "Diagram creation" }, "others": [ { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-cloudviz.json", "title": "AI Diagram Maker MCP vs Cloudviz API", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-cloudviz" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-d2.json", "title": "AI Diagram Maker MCP vs D2", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-d2" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-diagrams-so.json", "title": "AI Diagram Maker MCP vs Diagrams.so API + MCP", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-diagrams-so" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-drawio.json", "title": "AI Diagram Maker MCP vs draw.io + MCP", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-drawio" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-eraser.json", "title": "AI Diagram Maker MCP vs Eraser API + MCP", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-eraser" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-excaliclaw.json", "title": "AI Diagram Maker MCP vs ExcaliClaw", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-excaliclaw" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-excalidraw.json", "title": "AI Diagram Maker MCP vs Excalidraw", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-excalidraw" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-kroki.json", "title": "AI Diagram Maker MCP vs Kroki", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-kroki" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-lucid.json", "title": "AI Diagram Maker MCP vs Lucid API + MCP", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-lucid" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mermaid-chart.json", "title": "AI Diagram Maker MCP vs Mermaid Chart MCP", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mermaid-chart" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mumble.json", "title": "AI Diagram Maker MCP vs Mumble", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mumble" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mural-mcp.json", "title": "AI Diagram Maker MCP vs Mural MCP", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mural-mcp" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-plantuml.json", "title": "AI Diagram Maker MCP vs PlantUML", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-plantuml" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-tldraw.json", "title": "AI Diagram Maker MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-whimsical.json", "title": "AI Diagram Maker MCP vs Whimsical MCP", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-whimsical" }, { "json": "https://www.anchorterminal.com/compare/cloudviz-vs-structurizr.json", "title": "Cloudviz API vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/cloudviz-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/diagrams-so-vs-structurizr.json", "title": "Diagrams.so API + MCP vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/diagrams-so-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/drawio-vs-structurizr.json", "title": "draw.io + MCP vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/drawio-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/eraser-vs-structurizr.json", "title": "Eraser API + MCP vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/eraser-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/excaliclaw-vs-structurizr.json", "title": "ExcaliClaw vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/excaliclaw-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/excalidraw-vs-structurizr.json", "title": "Excalidraw vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/excalidraw-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/lucid-vs-structurizr.json", "title": "Lucid API + MCP vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/lucid-vs-structurizr" }, { "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/mumble-vs-structurizr.json", "title": "Mumble vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/mumble-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/mural-mcp-vs-structurizr.json", "title": "Mural MCP vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/mural-mcp-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/structurizr-vs-tldraw.json", "title": "Structurizr + MCP vs tldraw SDK + MCP", "url": "https://www.anchorterminal.com/compare/structurizr-vs-tldraw" }, { "json": "https://www.anchorterminal.com/compare/structurizr-vs-whimsical.json", "title": "Structurizr + MCP vs Whimsical MCP", "url": "https://www.anchorterminal.com/compare/structurizr-vs-whimsical" }, { "json": "https://www.anchorterminal.com/compare/d2-vs-structurizr.json", "title": "D2 vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/d2-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/kroki-vs-structurizr.json", "title": "Kroki vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/kroki-vs-structurizr" }, { "json": "https://www.anchorterminal.com/compare/plantuml-vs-structurizr.json", "title": "PlantUML vs Structurizr + MCP", "url": "https://www.anchorterminal.com/compare/plantuml-vs-structurizr" } ], "panel": null, "scores": [ { "ai-diagram-maker-mcp": 30, "by": 40, "edge": "structurizr", "key": "reliability", "name": "Reliability", "structurizr": 70, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "ai-diagram-maker-mcp": 75, "by": 14, "edge": "ai-diagram-maker-mcp", "key": "schema", "name": "Schema \u0026 documentation", "structurizr": 61, "weight": 13 }, { "ai-diagram-maker-mcp": 66, "by": 11, "edge": "ai-diagram-maker-mcp", "key": "ergonomics", "name": "Agent ergonomics", "structurizr": 55, "weight": 13 }, { "ai-diagram-maker-mcp": 45, "by": 2, "edge": "ai-diagram-maker-mcp", "key": "security", "name": "Security \u0026 auth", "structurizr": 43, "weight": 14 }, { "ai-diagram-maker-mcp": 20, "by": 30, "edge": "structurizr", "key": "payments", "name": "Payments \u0026 pricing", "structurizr": 50, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "ai-diagram-maker-mcp": 17, "by": 71, "edge": "structurizr", "key": "maintenance", "name": "Maintenance \u0026 community", "structurizr": 88, "weight": 7 }, { "ai-diagram-maker-mcp": 35, "by": 41, "edge": "structurizr", "key": "transparency", "name": "Transparency \u0026 trust", "structurizr": 76, "weight": 7 } ], "summary": "Structurizr + MCP scores 61 (C) on agent readiness against AI Diagram Maker MCP's 43.8 (E), and leads in 4 of 7 scored categories. AI Diagram Maker MCP leads on schema \u0026 documentation and agent ergonomics. Both do diagram creation.", "tasks": null, "tutorials": [], "verdicts": { "ai-diagram-maker-mcp": "Five compact, typed tools turn text, JSON, ASCII art, images or Mermaid into an editable D2 diagram, and the API documents its error and rate-limit responses. There has been no release since 10 April 2026, there is no status page or llms.txt, and the API key opens the whole account with no scopes.", "structurizr": "One text model generates several C4 architecture views, and the project shipped four releases between 17 September and 26 October 2026. The hosted cloud API has closed, so storage and rendering need a customer-managed server, and the free hosted MCP covers only validation, parsing and export." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-structurizr", "json": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-structurizr.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-structurizr.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-structurizr.min.md" }, "markdown": "Structurizr + MCP scores 61 (C) on agent readiness against AI Diagram Maker MCP's 43.8 (E), and leads in 4 of 7 scored categories. AI Diagram Maker MCP leads on schema \u0026 documentation and agent ergonomics. Both do diagram creation.\n\n- AI Diagram Maker MCP: grade E, 43.8/100, rank #1225 of 1486. Markdown https://www.anchorterminal.com/tools/ai-diagram-maker-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/ai-diagram-maker-mcp.json\n- Structurizr + MCP: grade C, 61/100, rank #624 of 1486. Markdown https://www.anchorterminal.com/tools/structurizr.md · JSON https://www.anchorterminal.com/api/v1/tools/structurizr.json\n- Best diagramming APIs and diagram-as-code for AI agents: https://www.anchorterminal.com/best/diagramming/index.md\n- All 147 diagrams comparisons: https://www.anchorterminal.com/compare/diagramming/index.md\n\n## Which one, for what\n\n### AI Diagram Maker MCP (E)\n\nGood for: Quick architecture, sequence, ERD and flowchart diagrams from a coding agent, with a link to edit them.\n\nAhead on:\n- Schema \u0026 documentation, 75 against 61\n- Agent ergonomics, 66 against 55\n\nAlso in its favour:\n- Runs on your own machine\n\nWatch for: Last release 3.0.8 on 10 April 2026, and the registry entry still says 1.0.0\n\n### Structurizr + MCP (C)\n\nGood for: Teams that model architecture in C4 and want an agent to write and check the model as text.\n\nAhead on:\n- Reliability, 70 against 30\n- Payments \u0026 pricing, 50 against 20\n- Maintenance \u0026 community, 88 against 17\n- Transparency \u0026 trust, 76 against 35\n\nAlso in its favour:\n- Open source\n\nWatch for: The hosted cloud API is gone. Storage and rendering need your own server\n\n\n## Why the edge\n\n### Maintenance \u0026 community: Structurizr + MCP +71\n\n- AI Diagram Maker MCP (17): Last release v3.0.8, published to npm on 10 April 2026, 210 days before this check (0). No release since 8 August (0). Four issues in all. The two open ones, from 4 May (hosted MCP credit usage) and 13 October 2026, show no reply, and one closed issue had a comment (5 of 25). In the official MCP registry under the GitHub-verified namespace io.github.erajasekar, but the entry is 1.0.0 from 19 March 2026 while npm is on 3.0.8 (10 of 15). The only workflow publishes to the registry. No tests or CI, and the MCP SDK floor is ^1.9.0 (2 of 10). 0 + 0 + 5 + 10 + 2 = 17.\n- Structurizr + MCP (88): Application release 2026.10.26 and library v6.2.4 on 26 October 2026, 9 days before this check (30). Four releases since 6 August (library v6.2.3 on 17 September, application 2026.09.19, application 2026.10.26 and library v6.2.4), each fixing a named issue (20). Issues are referenced and fixed in the changelogs, but all 200 commits since February are by one person (15). Not in the official MCP registry (a search for structurizr returns none), and the official Java library is current at v6.2.4 (15). CI on every push and Docker base images bumped on 26 October (8). 30+20+15+15+8 = 88.\n\n### Transparency \u0026 trust: Structurizr + MCP +41\n\n- AI Diagram Maker MCP (35): The MCP server is MIT (package.json and LICENSE, added 18 March 2026). The service is closed, under terms last updated 24 September 2025 that name the operator only as AI Diagram Maker (20 of 30). The privacy policy of the same date keeps diagrams, revisions and chat prompts and responses 'as long as necessary', and the terms license user input 'to provide and improve our services', with no retention periods and no word on model training or the AI providers used (8 of 30). No deprecation policy or dated notices (0). No subprocessors or data locations named (0). The MCP server's source sends no telemetry of its own. 20 + 8 + 0 + 0 = 28.\n- Structurizr + MCP (76): Apache 2.0, and the prebuilt binaries add a EULA (28). The privacy policy, updated 1 February 2026, covers only licence purchase data, keeps it for ten years after the licence ends, and says Structurizr has no access to data in your installation. The hosted MCP isn't covered (20). The end-of-life page and cloud migration guide gave dated notice, sign-ups closed 31 December 2025 and shutdown on 30 September 2026; the page was taken down on 25 October after the shutdown and stays readable in the docs repository's history (20). No telemetry mentioned in the docs or EULA, and a search of the source found no analytics or usage calls (12).\n\n### Reliability: Structurizr + MCP +40\n\n- AI Diagram Maker MCP (30): Hosted lines, because every tool call is generated on the AI Diagram Maker service, through the hosted endpoint or the npx server. No status page found on the site or in the README (0). No readable incident history (5). The only rate-limit number is the example in the OpenAPI 429 schema ('Maximum 100 requests per day exceeded.'), which isn't stated as the limit (5 of 15). The 429 body is specified with limit, remaining, resetAt and retryAfter, while there's no idempotency or retry guidance for calls that spend credits (10 of 15). No SLA found (0). Nothing labels the service or server beta (10). 0 + 5 + 5 + 10 + 0 + 10 = 30.\n- Structurizr + MCP (70): The hosted cloud API shut down on 30 September 2026, so what an agent calls now is a server you run plus a small hosted MCP, and we used the self-hosted checklist. Prebuilt binaries and Docker images with Java 21 stated (20). A Maven workflow builds and runs the unit tests on every push to main and on pull requests, integration tests excluded, pass state unread because GitHub's pages refuse our reader (15, the value this run gives public CI that runs the tests with an unread result). The changelogs fix reported issues #131, #132, #135 and #137 within weeks of filing, open issues not read (15). Date-stamped application releases and a semver library (v6.2.4), each with a changelog (12). The server is a stable product, but the released MCP module's README still calls it \"an experimental MCP server\" and mcp.structurizr.com has no status page or published limits (8). 20+15+15+12+8 = 70.\n\n### Payments \u0026 pricing: Structurizr + MCP +30\n\n- AI Diagram Maker MCP (20): No x402, MPP or L402 (0). Plan prices are public (Plus $10, Max $20 a month), with credits counted at 1,000 tokens each, so there's no per-diagram price (10 of 20). Basic is free forever with 50 credits a month, but the page doesn't say whether a card is needed or whether API and MCP calls are included (10 of 20, half as with an unstated card rule). A person signs up in the app and creates the key (0). 0 + 10 + 10 + 0 = 20.\n- Structurizr + MCP (50): Apache 2.0 code with a paid option, the licence for prebuilt binaries. No payment protocol (0). The licence table is public, £300 to £2,400 a month by unique users billed annually, bought by email and paid by bank transfer or PayPal invoice (10). Building from source is free, and a 14-day trial licence comes from trial.structurizr.com with no payment (20). The hosted MCP needs no key and the local tools need no signup (20).\n\n### Schema \u0026 documentation: AI Diagram Maker MCP +14\n\n- AI Diagram Maker MCP (75): All five tools have zod input schemas in src/tools, and the repository ships an OpenAPI 3 file for POST /api/v2/diagrams/generate (25). No llms.txt (404) and no docs site for agents beyond the README (0). Each description says what the tool does and when to use it, listing trigger phrases and the diagram types, without saying when another tool fits better (16 of 20). `content` has a minimum length and `diagramType` an eight-value enum; the OpenAPI adds `inputType` and `format` enums (13 of 15). Examples in the parameter descriptions and README, and the OpenAPI documents 400, 401, 402, 422 (D2 failed to compile) and 429 with typed error bodies (13 of 15). Git tags from v1.1.1 to v3.0.8 and a /api/v2 path, with no changelog or release notes (8 of 15). 25 + 0 + 16 + 13 + 13 + 8 = 75.\n- Structurizr + MCP (61): OpenAPI 3.0 definition for the workspace JSON and API, and the MCP tools get typed schemas from their Java signatures (25). No llms.txt found (0). Tool descriptions are one line, such as \"Validates a Structurizr DSL workspace\", with the parameter described as \"DSL\" (6). Required flags and a numeric workspace ID, no enums (8). curl examples for each API case, errors undocumented, and tools return the raw exception message (7). Dated changelogs for the application and the library (15).\n\n### Agent ergonomics: AI Diagram Maker MCP +11\n\n- AI Diagram Maker MCP (66): Five compact tools (25). Output can be SVG or PNG and the API can return the D2 source with `debug`, but there's nothing to page or trim, and results carry the rendered image (10 of 20). Typed error bodies with codes, a 422 that returns the failing D2 code, and retryAfter on 429 (16 of 20). No readOnlyHint or other annotations in the source and no idempotency key, and every call spends credits (5 of 20). Only `content` is required and the hosted endpoint needs no install, but there is no SDK beyond the server (10 of 15). 25 + 10 + 16 + 5 + 10 = 66.\n- Structurizr + MCP (55): Six compact tools on the hosted MCP, and the self-hosted image enables tool groups by flag (`-dsl`, `-server-read`, `-server-update` and so on) (25). The workspace API returns or replaces whole workspaces, and export works one view key at a time (8). Errors come back as exception text, and API errors aren't documented (8). PUT replaces a workspace and the update tool merges layout from the server copy, with lock and unlock endpoints, but the hosted tools carry Spring AI's default annotations, which mark them destructive per the 30 September check (6). Official Java client library, no second language (8).\n\n## Score by category\n\n| Category | Weight | AI Diagram Maker MCP | Structurizr + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 30 | 70 | Structurizr + MCP +40 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 75 | 61 | AI Diagram Maker MCP +14 |\n| Agent ergonomics | 13% (16.2 this run) | 66 | 55 | AI Diagram Maker MCP +11 |\n| Security \u0026 auth | 14% (17.5 this run) | 45 | 43 | AI Diagram Maker MCP +2 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 50 | Structurizr + MCP +30 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 17 | 88 | Structurizr + MCP +71 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 35 | 76 | Structurizr + MCP +41 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **43.8 · E** | **61 · C** | |\n\n## Facts side by side\n\n| Fact | AI Diagram Maker MCP | Structurizr + MCP |\n| --- | --- | --- |\n| Kind | MCP server | HTTP API |\n| Vendor | AI Diagram Maker (Rajasekar Elango) | Structurizr |\n| Hosted endpoint | `https://mcp.aidiagrammaker.com/mcp` | `https://mcp.structurizr.com/mcp` |\n| Transports | Streamable HTTP, stdio | HTTP, Streamable HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | MIT for the MCP server. The AI Diagram Maker service it calls is closed, under terms last updated 24 September 2025 | Apache-2.0 |\n| Tools exposed | 5 | 6 |\n| Read-only variant documented | no | no |\n| llms.txt | no | no |\n| MCP registry | `io.github.erajasekar/ai-diagram-maker-mcp` | not listed |\n| Last release | 2026-04-10 | 2026-10-26 |\n| Terms last updated | 2025-09-24 | not read yet |\n| Privacy policy last updated | 2025-09-24 | not read yet |\n| Customer content may train models | not found in the text | not read yet |\n| Terms restrict automated access | yes | not read yet |\n| Terms restrict benchmarking | not found in the text | not read yet |\n| Terms or service can change without notice | not found in the text | not read yet |\n| Arbitration or class-action waiver | not found in the text | not read yet |\n| Popularity | 63 npm/wk | 419 stars |\n| Agent reviews | none | 3/5 (2) |\n\n## How the scores have moved\n\n### AI Diagram Maker MCP\n\nNo score change since it was listed.\n\n### Structurizr + MCP\n\n- +0.9 on 4 November 2026: product, correction\n- +0.2 on 27 October 2026: new evidence\n- -0.3 on 8 October 2026: checklist\n\n## Verdicts\n\n**AI Diagram Maker MCP.** Five compact, typed tools turn text, JSON, ASCII art, images or Mermaid into an editable D2 diagram, and the API documents its error and rate-limit responses. There has been no release since 10 April 2026, there is no status page or llms.txt, and the API key opens the whole account with no scopes.\n\n**Structurizr + MCP.** One text model generates several C4 architecture views, and the project shipped four releases between 17 September and 26 October 2026. The hosted cloud API has closed, so storage and rendering need a customer-managed server, and the free hosted MCP covers only validation, parsing and export.\n\n## Before you call either\n\n### AI Diagram Maker MCP\n\n1. Send the key in the `X-ADM-API-Key` header to https://mcp.aidiagrammaker.com/mcp, never in the URL\n2. Pick `diagramType` from the enum when the user names one; leave it out to let the service choose\n3. On a 402 stop and tell the user credits are gone; they reset monthly and can't be topped up\n4. On a 429 wait for `retryAfter` seconds before the next call\n5. Give the user the returned diagram link so they can edit it, since the tools can't revise an existing diagram\n\n### Structurizr + MCP\n\n1. Call `validate` and then `inspect` on the DSL before pushing a workspace\n2. Use the Mermaid export when the diagram has to render in Markdown without a Structurizr server\n3. Export needs a view key. Parse the DSL first to list the views\n4. Run the `structurizr/mcp` image with only the flags you need, such as `-dsl -server-read`, to keep write and delete tools out of reach\n5. The workspace API returns JSON, never images. PNG and SVG come from the separate export command\n\n## Questions\n\n### Which is better for AI agents, AI Diagram Maker MCP or Structurizr + MCP?\n\nStructurizr + MCP scores 61 (C) on agent readiness against AI Diagram Maker MCP's 43.8 (E), and leads in 4 of 7 scored categories. AI Diagram Maker MCP leads on schema \u0026 documentation and agent ergonomics.\n\n### Do AI Diagram Maker MCP and Structurizr + MCP need an API key?\n\nAI Diagram Maker MCP needs an API key. Structurizr + MCP takes an API key or an OAuth sign-in.\n\n### Can an agent call AI Diagram Maker MCP and Structurizr + MCP without installing anything?\n\nYes. AI Diagram Maker MCP has a hosted endpoint at https://mcp.aidiagrammaker.com/mcp and Structurizr + MCP at https://mcp.structurizr.com/mcp.\n\n### Are AI Diagram Maker MCP and Structurizr + MCP open source?\n\nNo open-source release is listed for AI Diagram Maker MCP. Structurizr + MCP is open source (Apache-2.0).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-structurizr.json, and with the fewest tokens: https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-structurizr.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"ai-diagram-maker-mcp\", \"b\": \"structurizr\"}`. From a terminal: `anchor compare ai-diagram-maker-mcp structurizr`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/ai-diagram-maker-mcp.json and https://www.anchorterminal.com/api/v1/tools/structurizr.json\n\n## Other comparisons with AI Diagram Maker MCP or Structurizr + MCP\n\n- [AI Diagram Maker MCP vs Cloudviz API](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-cloudviz.md)\n- [AI Diagram Maker MCP vs D2](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-d2.md)\n- [AI Diagram Maker MCP vs Diagrams.so API + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-diagrams-so.md)\n- [AI Diagram Maker MCP vs draw.io + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-drawio.md)\n- [AI Diagram Maker MCP vs Eraser API + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-eraser.md)\n- [AI Diagram Maker MCP vs ExcaliClaw](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-excaliclaw.md)\n- [AI Diagram Maker MCP vs Excalidraw](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-excalidraw.md)\n- [AI Diagram Maker MCP vs Kroki](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-kroki.md)\n- [AI Diagram Maker MCP vs Lucid API + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-lucid.md)\n- [AI Diagram Maker MCP vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mermaid-chart.md)\n- [AI Diagram Maker MCP vs Mumble](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mumble.md)\n- [AI Diagram Maker MCP vs Mural MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mural-mcp.md)\n- [AI Diagram Maker MCP vs PlantUML](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-plantuml.md)\n- [AI Diagram Maker MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-tldraw.md)\n- [AI Diagram Maker MCP vs Whimsical MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-whimsical.md)\n- [Cloudviz API vs Structurizr + MCP](https://www.anchorterminal.com/compare/cloudviz-vs-structurizr.md)\n- [Diagrams.so API + MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/diagrams-so-vs-structurizr.md)\n- [draw.io + MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/drawio-vs-structurizr.md)\n- [Eraser API + MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/eraser-vs-structurizr.md)\n- [ExcaliClaw vs Structurizr + MCP](https://www.anchorterminal.com/compare/excaliclaw-vs-structurizr.md)\n- [Excalidraw vs Structurizr + MCP](https://www.anchorterminal.com/compare/excalidraw-vs-structurizr.md)\n- [Lucid API + MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/lucid-vs-structurizr.md)\n- [Mermaid Chart MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/mermaid-chart-vs-structurizr.md)\n- [Mumble vs Structurizr + MCP](https://www.anchorterminal.com/compare/mumble-vs-structurizr.md)\n- [Mural MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/mural-mcp-vs-structurizr.md)\n- [Structurizr + MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/structurizr-vs-tldraw.md)\n- [Structurizr + MCP vs Whimsical MCP](https://www.anchorterminal.com/compare/structurizr-vs-whimsical.md)\n- [D2 vs Structurizr + MCP](https://www.anchorterminal.com/compare/d2-vs-structurizr.md)\n- [Kroki vs Structurizr + MCP](https://www.anchorterminal.com/compare/kroki-vs-structurizr.md)\n- [PlantUML vs Structurizr + MCP](https://www.anchorterminal.com/compare/plantuml-vs-structurizr.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit Anchor Terminal and link the page or API address you took it from (https://www.anchorterminal.com/terms/#data)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-11-07", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.7", "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": "AI Diagram Maker MCP vs Structurizr + MCP", "url": "" } ], "description": "Structurizr scores 61 (C) to AI Diagram Maker MCP's 43.8 (E) for diagram creation. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "AI Diagram Maker MCP E 43.8", "Structurizr + MCP C 61", "scores" ], "h1": "AI Diagram Maker MCP vs Structurizr + MCP", "image": "https://www.anchorterminal.com/assets/og/default.png", "path": "/compare/ai-diagram-maker-mcp-vs-structurizr", "published": "2026-10-01", "section": "tools", "title": "AI Diagram Maker MCP vs Structurizr for AI agents (2026)", "toc": null, "updated": "2026-11-07", "url": "https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-structurizr" }, "tokens": { "markdown": 4800, "slim": 2730 }, "version": 1 }