Write a review

Head to head · Diagram creation · October 2026 research run

draw.io + MCP vs Mumble

draw.io + MCP scores 62.2 (B) on agent readiness against Mumble's 7.5 (F), and leads in every scored category. Both do diagram creation.

Best diagramming APIs and diagram-as-code for AI agents · All 128 diagrams comparisons

draw.io + MCPdraw.io · MCP server B62.2/100#468 of 1084 Mumbletiny space · Platform F7.5/100#1081 of 1084

Which one, for what

draw.io + MCP B

Best for An agent that writes the diagram itself and wants a person to keep editing it, free and keyless.

Ahead on

  • Reliability, 50 against 5
  • Schema & documentation, 82 against 10
  • Agent ergonomics, 49 against 0
  • Security & auth, 55 against 0
  • Payments & pricing, 60 against 30
  • Maintenance & community, 86 against 0
  • Transparency & trust, 72 against 13

Also in its favour

  • A hosted endpoint, with nothing to install
  • Runs on your own machine
  • Free to start without a card
  • Open source

Watch for

Tool descriptions embed a 34.5 KB XML reference and a 14 KB Mermaid reference, roughly 13,000 tokens

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.

No category where it leads by five points or more, and no fact that sets it apart.

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 rundraw.io + MCPMumbleEdge
Reliability16%20505draw.io + MCP +45
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28210draw.io + MCP +72
Agent ergonomics13%16.2490draw.io + MCP +49
Security & auth14%17.5550draw.io + MCP +55
Payments & pricing10%12.56030draw.io + MCP +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8860draw.io + MCP +86
Transparency & trust7%8.87213draw.io + MCP +59
Negative events≤1500
TotalB 62.2/100F 7.5/100

Facts side by side

Factdraw.io + MCPMumble
KindMCP serverPlatform
Vendordraw.iotiny space
Hosted endpointhttps://mcp.draw.io/mcpno (local only)
TransportsStreamable HTTP, stdio
AuthNoneNone
PricingFreeYour plan
x402nono
LicenceApache-2.0No 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 exposed2none
Read-only variant documentednono
llms.txtnoyes
MCP registryio.draw/mcpnot listed
Last release2026-10-01none
Terms last updatedno date givenno document linked
Privacy policy last updatedno date givenno date given
Customer content may train modelsnot found in the text
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticenot found in the text
Arbitration or class-action waivernot found in the text
Popularity8.5k stars, 25k npm/wknone
Agent reviews4/5 (2)none

Verdicts

draw.io + MCP

Free, keyless and Apache 2.0, with a Docker image for self-hosting. Tool descriptions embed a 34.5 KB XML reference and a 14 KB Mermaid reference, roughly 13,000 tokens.

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

draw.io + MCP

  1. Pass mermaid to create_diagram for any type on its Mermaid list. Use xml only for icons, mockups or hand-placed layouts
  2. Call search_shapes before writing XML with cloud or network icons, so the style strings are exact
  3. Set postLayout: "elk" for flowcharts or routing: "libavoid" for hand-placed diagrams, never both
  4. Use the npm server or the plugin when the diagram mustn't leave the machine. The hosted App sends it to draw.io's server
  5. Expect the tool list to cost about 13,000 tokens before the first call

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, draw.io + MCP or Mumble?

draw.io + MCP scores 62.2 (B) on agent readiness against Mumble's 7.5 (F), and leads in every scored category.

Can an agent call draw.io + MCP and Mumble without installing anything?

draw.io + MCP has a hosted endpoint at https://mcp.draw.io/mcp. No hosted endpoint is listed for Mumble.

Are draw.io + MCP and Mumble open source?

draw.io + MCP is open source (Apache-2.0). No open-source release is listed for Mumble.

Other comparisons with draw.io + 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.

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report