# Mumble (slim)

> 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.

- Full: https://www.anchorterminal.com/tools/mumble.md (~6,700 tokens) · this version ~1,980 tokens · JSON https://www.anchorterminal.com/tools/mumble.json · canonical https://www.anchorterminal.com/tools/mumble
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-14
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

**F · 7.5/100 · rank #1081 of 1084 · #17 in Diagramming · not agent-ready · confidence medium**


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.

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.

## Facts

- Kind: Platform · vendor: tiny space · category: Diagramming · legal entity: not named · provenance 16/100
- Auth: None · pricing: Your plan · x402: no · 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
- Probe metrics: not measured yet (probes haven't run)
- 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/<date-slug>/` 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)
- Prices: Beta free per month (plan)

- Scores: Reliability 5, Performance pending, Schema & documentation 10, Agent ergonomics 0, Security & auth 0, Payments & pricing 30, Task success pending, Maintenance & community 0, Transparency & trust 13 · total over the 7 assessed categories
- Why: Reliability, Graded on no interface. · Schema & documentation, Graded on the interface an outside agent can use, which is none, the reading used for every listing without one. · Agent ergonomics, Graded on the interface an outside agent can use. · Security & auth, Graded on the interface an outside agent can use. · Payments & pricing, Read with the plan lines, since the app can't be downloaded and the self-hosted reading assumes a package anyone can run. · Maintenance & community, Read for a closed product. · Transparency & trust, The editorial half.
- Sources: 14, open questions: 4, both in the full twin
- Capabilities: diagram.create, diagram.edit, diagram.architecture, diagram.export, meetings.recording, meetings.transcript, meetings.summary, speech.stt
- JSON: https://www.anchorterminal.com/api/v1/tools/mumble.json
- Verify (for the vendor): the badge `https://www.anchorterminal.com/badges/mumble.svg` or a link to https://www.anchorterminal.com/tools/mumble from a page on tinyspace.ai or one of its subdomains, then `POST https://www.anchorterminal.com/api/v1/verify` `{"slug", "url"}` or `verify_listing` at /mcp; re-checked weekly, no effect on the grade. Snippets in the full twin.

## Before you call it

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/<capture>/ 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

| Tool | Grade | Score | Shared capabilities | Slim |
| --- | --- | --- | --- | --- |
| D2 | B | 65.3 | diagram.create, diagram.export, diagram.edit, diagram.architecture | https://www.anchorterminal.com/tools/d2.min.md |
| draw.io + MCP | B | 62.2 | diagram.create, diagram.edit, diagram.export, diagram.architecture | https://www.anchorterminal.com/tools/drawio.min.md |
| Diagrams.so API + MCP | C | 60 | diagram.create, diagram.edit, diagram.export, diagram.architecture | https://www.anchorterminal.com/tools/diagrams-so.min.md |
| Structurizr + MCP | C | 59.9 | diagram.create, diagram.edit, diagram.export, diagram.architecture | https://www.anchorterminal.com/tools/structurizr.min.md |
| ExcaliClaw | D | 51.4 | diagram.create, diagram.edit, diagram.export, diagram.architecture | https://www.anchorterminal.com/tools/excaliclaw.min.md |


## Panel reviews (0, desk reviews from public material, no calls made)