# Mumble > 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. - Canonical: https://www.anchorterminal.com/tools/mumble - Markdown: https://www.anchorterminal.com/tools/mumble.md (~6,700 tokens) - Slim: https://www.anchorterminal.com/tools/mumble.min.md (~1,980 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/tools/mumble.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - Licence: 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. - Updated: 2026-10-14 ## Overview **Grade F · 7.5/100 · rank #1081 of 1084 · #17 in Diagramming · not agent-ready · not for agents · confidence medium** **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. ## Assessment 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. ## Facts | Field | Value | | --- | --- | | Vendor | tiny space (https://www.tinyspace.ai) | | Kind | Platform | | Category | Diagramming (https://www.anchorterminal.com/categories/diagramming) | | Auth | None · 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 | Your plan (Your plan) · 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). | | x402 | No · 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). | | Licence | 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 | | Docs | https://www.tinyspace.ai/mumble/docs | | llms.txt | https://www.tinyspace.ai/llms.txt | | Surface listed | The Mumble overview, docs, privacy, engineers, compare and about pages, llms.txt, sitemap.xml and robots.txt on tinyspace.ai, npm, GitHub repository search and the official MCP registry, read on 2026-10-14. The app and `mumble-mcp` were not installed or run | | Surfaces | A native macOS app, and a local MCP server `mumble-mcp` over stdio, described in the docs as a "developer setup today", that shares the app's engine (`@mumble/core`) and files. No link, package or repository for the binary was found, so no interface an outside agent can obtain and call today. No HTTP API, hosted endpoint or other CLI was found (https://www.tinyspace.ai/mumble/docs, checked 2026-10-14) | | Availability | Early-access waitlist with email confirmation. No page on the site links a download of the app or the MCP binary, and /mumble/download returns 404. `@mumble/core` and `mumble-mcp` are not on npm, GitHub repository search finds no repository for either, and the official MCP registry has no Mumble entry (checked 2026-10-14) | | MCP tools | Capture mode (15): `list_captures`, `get_transcript`, `get_canvas`, `search_nodes`, `set_topic`, `add_node`, `add_nodes`, `update_node`, `remove_node`, `add_edge`, `remove_edge`, `merge_nodes`, `propose`, `review_provisional`, `set_summary`. Refine mode adds `set_grouping` and `set_view` (https://www.tinyspace.ai/mumble/docs) | | Scoping | The path passed to `mumble-mcp` is a boundary. A folder with `capture.json` scopes the server to that one capture, and paths are resolved inside it so a symlink or `..` cannot reach out (https://www.tinyspace.ai/mumble/docs) | | Requirements | macOS 13 or later. Claude Code or Codex installed and signed in for the AI functions. Transcription-only mode works without them (https://www.tinyspace.ai/mumble#faq) | | Data flow | Audio, transcript file, map file and vocabulary list stay on the Mac. Transcript text and map context go to the person's AI provider under their account when AI functions are on. The page states tiny space never collects audio, API keys or meeting content (https://www.tinyspace.ai/mumble/privacy) | | Files | `~/Mumble//` holds `capture.json`, `diagram.canvas` and `audio.wav`. Canvas files are JSON with readable, stable node ids and deterministic serialisation (https://www.tinyspace.ai/mumble/docs) | | Diagram types | Six shapes (Decision, Brainstorm, Process, Research, Retro, Architecture) in three styles (Business, Sketch, Icons). Architecture uses ten symbols (https://www.tinyspace.ai/mumble/engineers) | | Export formats | Canvas as PNG, PDF or to the clipboard. Summary and transcript as Markdown. No Mermaid export (https://www.tinyspace.ai/mumble/engineers) | | Known limits | English only. No speaker labels. No real-time team editing. Writing to a capture being recorded is not merged. Mac only, no Windows, iPhone or iPad (https://www.tinyspace.ai/mumble#faq, https://www.tinyspace.ai/mumble/docs) | | Maker | "tiny space, an independent product lab. Mumble is our first product." No legal entity or address on the site (https://www.tinyspace.ai/about) | | 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 | | JSON | https://www.anchorterminal.com/api/v1/tools/mumble.json | ## Score breakdown (methodology v0.4, October 2026 research run) Assessed 2026-10-14 from public evidence against the published checklist (https://www.anchorterminal.com/benchmark/#checklist). Confidence: medium. Performance and Task success pending (no score, not in the total); the total is Σ(score × weight) ÷ 80 over the 7 assessed categories. "This run" is each category's share of the 100 points. | Category | Weight | This run | Score (0–100) | Points | | --- | --- | --- | --- | --- | | Reliability | 16% | 20 | 5 | 1.0 | | Performance | 10% | pending | pending | n/a | | Schema & documentation | 13% | 16.2 | 10 | 1.6 | | Agent ergonomics | 13% | 16.2 | 0 | 0.0 | | Security & auth | 14% | 17.5 | 0 | 0.0 | | Payments & pricing | 10% | 12.5 | 30 | 3.8 | | Task success | 10% | pending | pending | n/a | | Maintenance & community | 7% | 8.8 | 0 | 0.0 | | Transparency & trust (editorial 10, provenance 16) | 7% | 8.8 | 13 | 1.1 | | Negative events | up to −15 | up to −15 | none recorded | 0 | | **Total** | | | | **7.5 → F** | ### Why each score - Reliability 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. - Performance: Pending. Latency is measured per call by our probes, which haven't run yet, so this run doesn't score it. Its weight is shared across the assessed categories until the first probe window closes. - Schema & documentation 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). - Agent ergonomics 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. - Security & auth 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). - Payments & pricing 30: Read with the plan lines, since the app can't be downloaded and the self-hosted reading assumes a package anyone can run. No x402, MPP or L402 (0). The pricing section is public and says $0 during the beta and $0 for local use after it, while the Private (one-off) and Team (monthly) plans are marked coming soon with no price (10). Free during the beta with no card mentioned (20). Access is a waitlist that a person joins by email and confirms by link, with no programmatic route (0). The live map runs on the person's own Claude Code or Codex plan, which is that plan's cost. - Task success: Pending. Task success needs the category task suites run through each tool, which haven't run yet, so this run doesn't score it. Its weight is shared across the assessed categories until then. A data provider's data-quality score is published on its listing now and becomes half of this category when it's scored. - Maintenance & community 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 13: 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. Fix list for a coding agent, everything this grade says the listing lacks, the biggest gain first (17 items): https://www.anchorterminal.com/fixes/mumble.md (JSON https://www.anchorterminal.com/fixes/mumble.json) ### What we couldn't check - Whether people admitted from the waitlist receive `mumble-mcp` with the app. The docs call it a "developer setup today" and give only `/path/to/mumble-mcp`, and no public download, package, repository or registry entry was found on 14 October 2026. If it ships with the app, the schema, ergonomics and security lines could be read for a stdio MCP server, though it still couldn't be obtained without a person joining the waitlist. - Whether the app needs an account, sends analytics or crash reports, or checks for updates. Nothing on the site says. - Who the legal entity behind tiny space is. RDAP shows a GB registrant with other data redacted, and the site names none. - The docs' "developer setup today" for a binary with no public route was considered as a misleading claim and not deducted, since the page labels it a developer setup and the product as a waitlist beta. ### Sources - MCP docs: (seen 2026-10-14) - overview, pricing and FAQ: (seen 2026-10-14) - privacy data-flow page: (seen 2026-10-14) - engineers page and FAQ: (seen 2026-10-14) - about page: (seen 2026-10-14) - llms.txt: (seen 2026-10-14) - sitemap: (seen 2026-10-14) - security.txt (404): (seen 2026-10-14) - npm lookup for mumble-mcp (404): (seen 2026-10-14) - npm lookup for @mumble/core (404): (seen 2026-10-14) - GitHub repository search for mumble-mcp: (seen 2026-10-14) - official MCP registry search: (seen 2026-10-14) - terms, 404: (seen 2026-10-14) - RDAP, registered 2026-07-02: (seen 2026-10-14) ## Who's behind it (provenance 16/100, checked 2026-10-14) | Check | Finding | Points | | --- | --- | --- | | Legal entity named | not found | 0/20 | | Domain age | tinyspace.ai, registered 2026-07-02 (under a year) | 0/15 | | Endpoint on the vendor's domain | no hosted endpoint | n/a | | Terms of service | nothing hosted, so the 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 licence stands in | 10/10 | | Privacy policy | read, states 0 of the 8 things a reader expects | 4/10 | | Status page | not found | 0/10 | | Changelog | not found | 0/10 | | security.txt | not found | 0/10 | 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. ### Terms and privacy, as read A reading by a fixed set of rules, each answered with the vendor's own sentence. Not legal advice. **Terms of service**. Nothing is hosted by the vendor, so there are no terms of service to read. The 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 licence stands in and the check scores in full. **Privacy policy** (https://www.tinyspace.ai/mumble/privacy), read 2026-10-14, gives no date, states 0 of the 8 things a reader expects. - Not found in the text. Gives the date it was last updated. - Not found in the text. Says what personal data is collected. - Not found in the text. Says how long data is kept. - Not found in the text. Says who else receives the data. - Not found in the text. Says whether personal data is sold or shared for advertising. - Not found in the text. Says what rights people have over their data. - Not found in the text. Gives a privacy contact. - Not found in the text. Says where data is transferred or stored. ## Live (updated 2026-10-14 21:18 UTC) - Watching pricing - Watching privacy - Always current: https://www.anchorterminal.com/api/v1/live/mumble.json ## Probe metrics Not measured yet. Our benchmark probes haven't run, so there's no availability, latency or error rate from a run and Performance is pending. Live uptime, where we poll the endpoint, is under Live and doesn't change the score. ## Prices | Item | Price | Unit | Note | | --- | --- | --- | --- | | Beta | free | per month (plan) | free during the beta. AI functions use the person's own Claude Code or Codex plan | Across all listings: https://www.anchorterminal.com/prices/index.md ## 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) ## Before you call it (notes for agents) 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 ## Similar tools Ranked by shared capabilities, then score. Same-category tools with no shared capability key are listed last. | Tool | Grade | Score | Rank | Shared capabilities | x402 | Markdown | | --- | --- | --- | --- | --- | --- | --- | | D2 | B | 65.3 | 343 | diagram.create, diagram.export, diagram.edit, diagram.architecture | no | https://www.anchorterminal.com/tools/d2.md | | draw.io + MCP | B | 62.2 | 468 | diagram.create, diagram.edit, diagram.export, diagram.architecture | no | https://www.anchorterminal.com/tools/drawio.md | | Diagrams.so API + MCP | C | 60 | 564 | diagram.create, diagram.edit, diagram.export, diagram.architecture | no | https://www.anchorterminal.com/tools/diagrams-so.md | | Structurizr + MCP | C | 59.9 | 565 | diagram.create, diagram.edit, diagram.export, diagram.architecture | no | https://www.anchorterminal.com/tools/structurizr.md | | ExcaliClaw | D | 51.4 | 804 | diagram.create, diagram.edit, diagram.export, diagram.architecture | no | https://www.anchorterminal.com/tools/excaliclaw.md | | Eraser API + MCP | E | 38.6 | 1000 | diagram.create, diagram.edit, diagram.export, diagram.architecture | no | https://www.anchorterminal.com/tools/eraser.md | ## Panel reviews (0) Reviewed by the Anchor panel (https://www.anchorterminal.com/reviewers/index.md): . Desk reviews, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. For a desk review, the outcome says whether the reviewer's questions could be answered from public material: success, partial or failure. How reviews work: https://www.anchorterminal.com/reviews/how-it-works.md ## Notable - Availability is an early-access waitlist that needs email confirmation. No download link for the app was found on any page in the sitemap (source: ) - The docs describe a local MCP server, `mumble-mcp`, over stdio, as a "developer setup today". They give `/path/to/mumble-mcp` and no download, package or repository for the binary (source: ) - The docs list 15 MCP tools in capture mode and two more, `set_grouping` and `set_view`, when started with `--refine` (source: ) - Tools return errors as values, such as `{"ok": false, "error": "no node bata"}`, and there is no undo tool. The docs recommend git as the undo (source: ) - Audio is transcribed on the Mac with Whisper (whisper.cpp) and never uploaded. The transcript text and map context go to the person's Claude Code or Codex provider when AI functions are on (source: ) - Each conversation is a folder in `~/Mumble` with `capture.json` (transcript, append-only), `diagram.canvas` (deterministic JSON) and `audio.wav` (source: ) - The site names the maker as "tiny space, an independent product lab". No legal entity, address, terms of use or privacy policy was found (source: ) - #17 of 17 in Best diagramming APIs and diagram-as-code for AI agents: https://www.anchorterminal.com/best/diagramming/index.md - All 128 diagrams comparisons: https://www.anchorterminal.com/compare/diagramming/index.md ## Compare - [Cloudviz API vs Mumble](https://www.anchorterminal.com/compare/cloudviz-vs-mumble.md): F 37.7 vs F 7.5 - [D2 vs Mumble](https://www.anchorterminal.com/compare/d2-vs-mumble.md): B 65.3 vs F 7.5 - [Diagrams.so API + MCP vs Mumble](https://www.anchorterminal.com/compare/diagrams-so-vs-mumble.md): C 60 vs F 7.5 - [draw.io + MCP vs Mumble](https://www.anchorterminal.com/compare/drawio-vs-mumble.md): B 62.2 vs F 7.5 - [Eraser API + MCP vs Mumble](https://www.anchorterminal.com/compare/eraser-vs-mumble.md): E 38.6 vs F 7.5 - [ExcaliClaw vs Mumble](https://www.anchorterminal.com/compare/excaliclaw-vs-mumble.md): D 51.4 vs F 7.5 - [Excalidraw vs Mumble](https://www.anchorterminal.com/compare/excalidraw-vs-mumble.md): C 54.5 vs F 7.5 - [Kroki vs Mumble](https://www.anchorterminal.com/compare/kroki-vs-mumble.md): C 59.2 vs F 7.5 - [Lucid API + MCP vs Mumble](https://www.anchorterminal.com/compare/lucid-vs-mumble.md): C 60.6 vs F 7.5 - [Mermaid Chart MCP vs Mumble](https://www.anchorterminal.com/compare/mermaid-chart-vs-mumble.md): F 31.4 vs F 7.5 - [Mumble vs Mural MCP](https://www.anchorterminal.com/compare/mumble-vs-mural-mcp.md): F 7.5 vs E 41.9 - [Mumble vs PlantUML](https://www.anchorterminal.com/compare/mumble-vs-plantuml.md): F 7.5 vs B 66.9 - [Mumble vs Structurizr + MCP](https://www.anchorterminal.com/compare/mumble-vs-structurizr.md): F 7.5 vs C 59.9 - [Mumble vs tldraw SDK + MCP](https://www.anchorterminal.com/compare/mumble-vs-tldraw.md): F 7.5 vs C 60.7 - [Mumble vs Whimsical MCP](https://www.anchorterminal.com/compare/mumble-vs-whimsical.md): F 7.5 vs D 52.6 ## Verify this listing For the vendor. The badge or a plain link to this page verifies the listing, from a page on tinyspace.ai or one of its subdomains. It shows the listing is the vendor's and that the vendor knows it's here, and it never changes a grade, rank or review. The vendor sends the page's address to `POST https://www.anchorterminal.com/api/v1/verify` as `{"slug": "mumble", "url": "…"}`, or calls the `verify_listing` tool at https://www.anchorterminal.com/mcp. We fetch the page once, then again every week; two failed checks in a row and the verification lapses, and a later pass restores it. What we check: https://www.anchorterminal.com/builders/index.md#verify HTML badge: ```html Mumble on Anchor Terminal ``` Markdown badge, for a README: ```markdown [![Mumble on Anchor Terminal](https://www.anchorterminal.com/badges/mumble.svg)](https://www.anchorterminal.com/tools/mumble) ``` Plain link: ```html Mumble on Anchor Terminal ``` ## Share this listing For the vendor. Sharing assets for social media, two PNGs of 1200 × 630 that say Mumble is listed on Anchor Terminal, with the vendor's logo and this page's address and no grade or score. - Dark: https://www.anchorterminal.com/assets/share/mumble-dark.png - Light: https://www.anchorterminal.com/assets/share/mumble-light.png - Create a video and download its frames: https://www.anchorterminal.com/assets/listing-video/index.html?listing=mumble