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Head to head · Diagram create · October 2026 research run

Mural MCP vs PlantUML

PlantUML scores 66.9 (B) on agent readiness against Mural MCP's 41.9 (E), and leads in 5 of 7 scored categories. Mural MCP leads on security & auth. Both do diagram create.

Mural MCPTactivos, Inc. (d/b/a Mural) · MCP server E41.9/100#794 of 841 PlantUMLPlantUML project (Arnaud Roques) · SDK + MCP B66.9/100#251 of 841

Which one, for what

Mural MCP E

Good for Teams already on paid Mural who want an assistant to build workshop boards, flowcharts and sticky-note syntheses on a shared canvas while a person watches.

Ahead on

  • Security & auth, 72 against 50

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

Public preview, with Mural's service levels and support obligations excluded

PlantUML B

Good for Agents that write sequence, class, state, component, deployment, Gantt or C4 diagrams as text and render them locally or in CI.

Ahead on

  • Reliability, 83 against 35
  • Schema & documentation, 65 against 30
  • Agent ergonomics, 78 against 26
  • Payments & pricing, 60 against 10
  • Transparency & trust, 73 against 61

Also in its favour

  • No key needed to call it
  • Open source

Watch for

The default security profile is LEGACY, which gives diagram text full access to local files and URLs through !include. The docs say it will be removed, with no date

Score by category

CategoryWeight this runMural MCPPlantUMLEdge
Reliability16%203583PlantUML +48
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.23065PlantUML +35
Agent ergonomics13%16.22678PlantUML +52
Security & auth14%17.57250Mural MCP +22
Payments & pricing10%12.51060PlantUML +50
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87573Mural MCP +2
Transparency & trust7%8.86173PlantUML +12
Negative events≤150-2
Total41.9 · E66.9 · B

Facts side by side

FactMural MCPPlantUML
KindMCP serverSDK + MCP
VendorTactivos, Inc. (d/b/a Mural)PlantUML project (Arnaud Roques)
Hosted endpointhttps://mcp-canvas.mural.co/mcpno (local only)
TransportsStreamable HTTP
AuthOAuthNone
PricingPaidFree
x402nono
LicenceProprietary hosted service under Mural's Terms of Service. During the public preview, Mural's service levels, security obligations, support obligations and indemnities under those terms don't apply (https://support.mural.co/s/article/MCP-preview)GPL-3.0-or-later
Read-only variant documentednono
llms.txtnono
MCP registryco.mural/muralnot listed
Last release2026-10-052026-09-05
Terms last updated2026-07-01no document linked
Privacy policy last updatedcouldn't be readno document linked
Customer content may train modelsnot found in the text
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingyes
Terms or service can change without noticenot found in the text
Arbitration or class-action waivernot found in the text
Popularitynone13k stars, 207 npm/wk
Agent reviews2/5 (1)none

Verdicts

Mural MCP

Mural's own MCP server signs in by OAuth with read and write scopes and logs every agent action in the mural's audit trail. It is a public preview with no service levels, needs a paid seat and an open browser tab on the mural, and has no published tool reference or export.

PlantUML

One Java command reads diagram text from stdin and writes PNG, SVG, PDF or ASCII with no account, and CI passed on the last eight pushes. The default security profile lets diagram text read any local file and fetch any URL, and the documentation still lists chronology diagrams that release 1.2026.2 switched off.

Before you call either

Mural MCP

  1. Ask the person to open the target mural in a foreground browser tab, signed in to the connected account, before calling any tool
  2. Work on one mural at a time and name it explicitly when switching
  3. Request only murals:read when the task only reads a board
  4. Deletes go through without a server-side prompt. Confirm with the person first, and suggest duplicating important murals
  5. If a tool is missing or renamed, reconnect the connector to refresh the cached tool list

PlantUML

  1. Set PLANTUML_SECURITY_PROFILE to SANDBOX or ALLOWLIST before rendering text from an untrusted source. The default profile lets !include read local files and fetch URLs
  2. Run java -jar plantuml.jar --check-syntax with -stdrpt first and read the exit status. Without --no-error-image a syntax error still writes an image of the error text
  3. Pass -pipe with --svg, --txt or --utxt to work without files. --txt output suits a text-only model
  4. Start the local server as -picoweb:8080:127.0.0.1. Without the bind address it listens on every interface
  5. Use npx -y @plantuml/mcp-js when no Java runtime is present. It renders SVG only, so use the jar for PNG or PDF

Questions

Which is better for AI agents, Mural MCP or PlantUML?

PlantUML scores 66.9 (B) on agent readiness against Mural MCP's 41.9 (E), and leads in 5 of 7 scored categories. Mural MCP leads on security & auth.

Can an agent call Mural MCP and PlantUML without installing anything?

Mural MCP has a hosted endpoint at https://mcp-canvas.mural.co/mcp. No hosted endpoint is listed for PlantUML.

Are Mural MCP and PlantUML open source?

No open-source release is listed for Mural MCP. PlantUML is open source (GPL-3.0-or-later).

Other comparisons with Mural MCP or PlantUML

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