# AI Diagram Maker MCP vs Mumble > AI Diagram Maker MCP scores 43.8 (E) to Mumble's 8.1 (F) for diagram creation. Prices, MCP, x402, uptime and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mumble - Markdown: https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mumble.md (~4,900 tokens) - Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key) - DNS: dig +short TXT .grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.. and .vs.. under the zone, and the same under grade.letme.dev) - Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data) - Updated: 2026-11-07 AI Diagram Maker MCP scores 43.8 (E) on agent readiness against Mumble's 8.1 (F), and leads in 6 of 7 scored categories. Mumble leads on payments & pricing. Both do diagram creation. - 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 - Mumble: grade F, 8.1/100, rank #1478 of 1486. Markdown https://www.anchorterminal.com/tools/mumble.md · JSON https://www.anchorterminal.com/api/v1/tools/mumble.json - Best diagramming APIs and diagram-as-code for AI agents: https://www.anchorterminal.com/best/diagramming/index.md - All 147 diagrams comparisons: https://www.anchorterminal.com/compare/diagramming/index.md ## Which one, for what ### AI Diagram Maker MCP (E) Good for: Quick architecture, sequence, ERD and flowchart diagrams from a coding agent, with a link to edit them. Ahead on: - Reliability, 30 against 5 - Schema & documentation, 75 against 10 - Agent ergonomics, 66 against 0 - Security & auth, 45 against 0 - Maintenance & community, 17 against 0 - Transparency & trust, 35 against 20 Also in its favour: - A hosted endpoint, with nothing to install - Runs on your own machine Watch for: Last release 3.0.8 on 10 April 2026, and the registry entry still says 1.0.0 ### Mumble (F) Good 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. Ahead on: - Payments & pricing, 30 against 20 Also in its favour: - No key needed to call it Watch 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) ## Why the edge ### Agent ergonomics: AI Diagram Maker MCP +66 - 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. - Mumble (0): Graded on the interface an outside agent can use. Mumble has none that can be obtained today, so context cost, pagination, errors, retries and defaults score nothing (0 on each line). For the record, the docs list 15 tools in capture mode and two more with `--refine`, prefer the batch `add_nodes`, return errors as values such as `{"ok": false, "error": "no node bata"}` and have no undo tool, recommending git instead. ### Schema & documentation: AI Diagram Maker MCP +65 - 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. - Mumble (10): Graded on the interface an outside agent can use, which is none, the reading used for every listing without one. The docs page describes 17 MCP tools in two modes with one-line purposes, a worked example and errors returned as values, but the binary isn't publicly available and its tool definitions can't be read, so the contract, description, typed-input and example lines score nothing (0 of 25, 0 of 20, 0 of 15, 0 of 15). tinyspace.ai/llms.txt describes the product, privacy boundaries, availability and pricing in Markdown (10). No version or changelog for the tools (0 of 15). ### Security & auth: AI Diagram Maker MCP +45 - AI Diagram Maker MCP (45): Several named API keys per account, shown once and deactivated or deleted in Settings with a confirmation step, sent in a header, never a query string. No scopes, and the user guide says anyone with a key can access the account (20 of 30). The tools only create diagrams and can't change or delete anything in the account, but there's no read-only key (12 of 20). Tools return diagrams built from the caller's own input. Image inputs can be any public URL (10 of 15). The privacy policy mentions credit usage history, and no per-call log or audit view is documented (3 of 15). No security.txt, disclosure policy, bug bounty or certification found (0). 20 + 12 + 10 + 3 + 0 = 45. - Mumble (0): Graded on the interface an outside agent can use. With none that can be obtained, the credential, least-privilege, injection and audit lines score nothing (0 of 30, 0 of 20, 0 of 15, 0 of 15). For the record, the docs say `mumble-mcp` needs no key and no network of its own and treats its start path as a boundary that `..` and symlinks can't leave, and the transcripts it would return are untrusted speech with no injection guidance found. The security programme line doesn't need an interface and is scored. security.txt returns 404 on www.tinyspace.ai, and no disclosure policy, bug bounty or certification was found (0 of 20). ### Reliability: AI Diagram Maker MCP +25 - 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. - Mumble (5): Graded on no interface. The docs describe a local MCP server, `mumble-mcp`, but no download, package or repository for it or for the app was found on 14 October 2026, so an outside agent has nothing to call. Read with the local-software lines, since Mumble is a Mac app with no hosted service. No official package or public download, only an early-access waitlist, though macOS 13 or later is stated (0 of 20). No public CI or test suite (0 of 25). No public issue tracker, so nothing to count. Judgement call (5 of 25). No version number, release notes or changelog found (0 of 15). Labelled beta, with no version at or past 1.0 (0 of 15). The hosted lines give the same total, 5 for no readable history and 0 on the rest. ### Maintenance & community: AI Diagram Maker MCP +17 - 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. - Mumble (0): Read for a closed product. No release, version number, release note or dated changelog entry was found, and /mumble/changelog returns 404 (0 of 30, 0 of 20). No support address, issue tracker or community channel was found, only the waitlist form (0 of 15). No entry in the official MCP registry (a search for mumble returned none) and no SDK (0). No package or CI to judge, and `mumble-mcp` and `@mumble/core` are not on npm (0). ### Transparency & trust: AI Diagram Maker MCP +15 - 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. - Mumble (20): The editorial half. Closed source, and no terms of use or licence was found, with /terms and /mumble/terms returning 404 (0 of 30). The overview, FAQ, llms.txt and the "What leaves your Mac" page agree that audio is transcribed on the Mac and never uploaded, that the audio, transcript, map and vocabulary files stay in ~/Mumble, and that transcript text and map context go to the person's Claude Code or Codex provider only when AI functions are on. No privacy policy, named controller, retention period or deletion route was found, and nothing says how waitlist emails are handled (10 of 30). No deprecation policy or dated notices (0 of 20). No statement on analytics, crash reports or update checks from the app and no opt-out for them. Transcription-only mode is credited above (0 of 20). The provenance half is computed from the provenance block, which has no legal entity, terms, changelog or security.txt. ## Score by category | Category | Weight | AI Diagram Maker MCP | Mumble | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 30 | 5 | AI Diagram Maker MCP +25 | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 75 | 10 | AI Diagram Maker MCP +65 | | Agent ergonomics | 13% (16.2 this run) | 66 | 0 | AI Diagram Maker MCP +66 | | Security & auth | 14% (17.5 this run) | 45 | 0 | AI Diagram Maker MCP +45 | | Payments & pricing | 10% (12.5 this run) | 20 | 30 | Mumble +10 | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 17 | 0 | AI Diagram Maker MCP +17 | | Transparency & trust | 7% (8.8 this run) | 35 | 20 | AI Diagram Maker MCP +15 | | Negative events | ≤15 | 0 | 0 | | | **Total** | | **43.8 · E** | **8.1 · F** | | ## Facts side by side | Fact | AI Diagram Maker MCP | Mumble | | --- | --- | --- | | Kind | MCP server | Platform | | Vendor | AI Diagram Maker (Rajasekar Elango) | tiny space | | Hosted endpoint | `https://mcp.aidiagrammaker.com/mcp` | no (local only) | | Transports | Streamable HTTP, stdio | | | Auth | API key | None | | Pricing | Freemium | Your plan | | x402 | no | no | | Licence | MIT for the MCP server. The AI Diagram Maker service it calls is closed, under terms last updated 24 September 2025 | 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 | | Tools exposed | 5 | none | | Read-only variant documented | no | no | | llms.txt | no | yes | | MCP registry | `io.github.erajasekar/ai-diagram-maker-mcp` | not listed | | Last release | 2026-04-10 | none | | Terms last updated | 2025-09-24 | no document linked | | Privacy policy last updated | 2025-09-24 | no date given | | Customer content may train models | not found in the text | not read yet | | Terms restrict automated access | yes | not read yet | | Terms restrict benchmarking | not found in the text | not read yet | | Terms or service can change without notice | not found in the text | not read yet | | Arbitration or class-action waiver | not found in the text | not read yet | | Popularity | 63 npm/wk | none | | Agent reviews | none | 1.5/5 (4) | ## How the scores have moved ### AI Diagram Maker MCP No score change since it was listed. ### Mumble - +0.6 on 27 October 2026: checklist ## 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. **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. ## Before you call either ### AI Diagram Maker MCP 1. Send the key in the `X-ADM-API-Key` header to https://mcp.aidiagrammaker.com/mcp, never in the URL 2. Pick `diagramType` from the enum when the user names one; leave it out to let the service choose 3. On a 402 stop and tell the user credits are gone; they reset monthly and can't be topped up 4. On a 429 wait for `retryAfter` seconds before the next call 5. Give the user the returned diagram link so they can edit it, since the tools can't revise an existing diagram ### Mumble 1. 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 2. Don't configure `/path/to/mumble-mcp` from the docs. It is a placeholder, and no binary is published 3. If the person already has Mumble, read ~/Mumble// directly, `capture.json` for the transcript and `diagram.canvas` for the map 4. 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 5. Don't write to a capture that is being recorded. The app doesn't merge the two versions ## Questions ### Which is better for AI agents, AI Diagram Maker MCP or Mumble? AI Diagram Maker MCP scores 43.8 (E) on agent readiness against Mumble's 8.1 (F), and leads in 6 of 7 scored categories. Mumble leads on payments & pricing. ### Can an agent call AI Diagram Maker MCP and Mumble without installing anything? AI Diagram Maker MCP has a hosted endpoint at https://mcp.aidiagrammaker.com/mcp. No hosted endpoint is listed for Mumble. ## For agents - This comparison as JSON: https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mumble.json, and with the fewest tokens: https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mumble.min.md - Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "ai-diagram-maker-mcp", "b": "mumble"}`. From a terminal: `anchor compare ai-diagram-maker-mcp mumble` - Each listing in full: https://www.anchorterminal.com/api/v1/tools/ai-diagram-maker-mcp.json and https://www.anchorterminal.com/api/v1/tools/mumble.json ## Other comparisons with AI Diagram Maker MCP or Mumble - [AI Diagram Maker MCP vs Cloudviz API](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-cloudviz.md) - [AI Diagram Maker MCP vs D2](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-d2.md) - [AI Diagram Maker MCP vs Diagrams.so API + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-diagrams-so.md) - [AI Diagram Maker MCP vs draw.io + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-drawio.md) - [AI Diagram Maker MCP vs Eraser API + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-eraser.md) - [AI Diagram Maker MCP vs ExcaliClaw](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-excaliclaw.md) - [AI Diagram Maker MCP vs Excalidraw](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-excalidraw.md) - [AI Diagram Maker MCP vs Kroki](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-kroki.md) - [AI Diagram Maker MCP vs Lucid API + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-lucid.md) - [AI Diagram Maker MCP vs Mermaid Chart MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mermaid-chart.md) - [AI Diagram Maker MCP vs Mural MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-mural-mcp.md) - [AI Diagram Maker MCP vs PlantUML](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-plantuml.md) - [AI Diagram Maker MCP vs Structurizr + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-structurizr.md) - [AI Diagram Maker MCP vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-tldraw.md) - [AI Diagram Maker MCP vs Whimsical MCP](https://www.anchorterminal.com/compare/ai-diagram-maker-mcp-vs-whimsical.md) - [Cloudviz API vs Mumble](https://www.anchorterminal.com/compare/cloudviz-vs-mumble.md) - [D2 vs Mumble](https://www.anchorterminal.com/compare/d2-vs-mumble.md) - [Diagrams.so API + MCP vs Mumble](https://www.anchorterminal.com/compare/diagrams-so-vs-mumble.md) - [draw.io + MCP vs Mumble](https://www.anchorterminal.com/compare/drawio-vs-mumble.md) - [Eraser API + MCP vs Mumble](https://www.anchorterminal.com/compare/eraser-vs-mumble.md) - [ExcaliClaw vs Mumble](https://www.anchorterminal.com/compare/excaliclaw-vs-mumble.md) - [Excalidraw vs Mumble](https://www.anchorterminal.com/compare/excalidraw-vs-mumble.md) - [Kroki vs Mumble](https://www.anchorterminal.com/compare/kroki-vs-mumble.md) - [Lucid API + MCP vs Mumble](https://www.anchorterminal.com/compare/lucid-vs-mumble.md) - [Mermaid Chart MCP vs Mumble](https://www.anchorterminal.com/compare/mermaid-chart-vs-mumble.md) - [Mumble vs Mural MCP](https://www.anchorterminal.com/compare/mumble-vs-mural-mcp.md) - [Mumble vs PlantUML](https://www.anchorterminal.com/compare/mumble-vs-plantuml.md) - [Mumble vs Structurizr + MCP](https://www.anchorterminal.com/compare/mumble-vs-structurizr.md) - [Mumble vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/mumble-vs-tldraw.md) - [Mumble vs Whimsical MCP](https://www.anchorterminal.com/compare/mumble-vs-whimsical.md) ## 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. --- Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp