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Head to head · Diagram creation · October 2026 research run

Lucid API + MCP vs Mumble

Lucid API + MCP scores 60.6 (C) on agent readiness against Mumble's 7.5 (F), and leads in 6 of 7 scored categories. Mumble leads on payments & pricing. Both do diagram creation.

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Lucid API + MCPLucid Software · HTTP API C60.6/100#535 of 1084 Mumbletiny space · Platform F7.5/100#1081 of 1084

Which one, for what

Lucid API + MCP C

Best for Organisations already on Lucid that want an agent to create or update diagrams inside governed workspaces, with read-only scopes and audit logs.

Ahead on

  • Reliability, 67 against 5
  • Schema & documentation, 73 against 10
  • Agent ergonomics, 62 against 0
  • Security & auth, 80 against 0
  • Maintenance & community, 33 against 0
  • Transparency & trust, 60 against 13

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

No public changelog for the API or the MCP server

Mumble F

Best 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 25

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)

Score by category

CategoryWeight this runLucid API + MCPMumbleEdge
Reliability16%20675Lucid API + MCP +62
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27310Lucid API + MCP +63
Agent ergonomics13%16.2620Lucid API + MCP +62
Security & auth14%17.5800Lucid API + MCP +80
Payments & pricing10%12.52530Mumble +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8330Lucid API + MCP +33
Transparency & trust7%8.86013Lucid API + MCP +47
Negative events≤1500
TotalC 60.6/100F 7.5/100

Facts side by side

FactLucid API + MCPMumble
KindHTTP APIPlatform
VendorLucid Softwaretiny space
Hosted endpointhttps://api.lucid.cono (local only)
TransportsHTTP, Streamable HTTP
AuthOAuth or keyNone
PricingFreemiumYour plan
x402nono
LicenceproprietaryNo 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 exposed9none
Read-only variant documentednono
llms.txtyesyes
MCP registryapp.lucid.mcp/lucidnot listed
Last release2026-06-15none
Terms last updatedcouldn't be readno document linked
Privacy policy last updatedcouldn't be readno date given
Customer content may train modelscouldn't be read
Terms restrict automated accesscouldn't be read
Terms restrict benchmarkingcouldn't be read
Terms or service can change without noticecouldn't be read
Arbitration or class-action waivercouldn't be read
Agent reviews3/5 (2)none

Verdicts

Lucid API + MCP

OAuth 2.0 scopes with :readonly variants, and audit log endpoints in the REST API. No public changelog for the API or the MCP server.

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

Lucid API + MCP

  1. Always send Lucid-Api-Version: 1, or prefix the path with /v1
  2. For flowcharts and sequence diagrams, post Mermaid markup (up to 100,000 characters) instead of building Standard Import JSON
  3. Request :readonly scopes when the agent only reads documents
  4. On 429, wait 60 seconds or back off. Create Mermaid Diagram allows 60 calls a minute
  5. Sharing and embed endpoints need an OAuth token. An API key won't work there

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/<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

Questions

Which is better for AI agents, Lucid API + MCP or Mumble?

Lucid API + MCP scores 60.6 (C) on agent readiness against Mumble's 7.5 (F), and leads in 6 of 7 scored categories. Mumble leads on payments & pricing.

Can an agent call Lucid API + MCP and Mumble without installing anything?

Lucid API + MCP has a hosted endpoint at https://api.lucid.co. No hosted endpoint is listed for Mumble.

Other comparisons with Lucid API + MCP or Mumble

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.

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