Head to head · Diagram create · October 2026 research run
Eraser API + MCP vs Mural MCP
Mural MCP scores 42 (E) on agent readiness against Eraser API + MCP's 38.7 (E), and leads in 4 of 7 scored categories. Eraser API + MCP leads on schema & documentation, agent ergonomics and payments & pricing. Both do diagram create.
Which one, for what
Good for Teams already writing docs and diagrams in Eraser who want an agent to generate or edit inside that workspace.
Ahead on
- Schema & documentation, 52 against 30
- Agent ergonomics, 34 against 26
- Payments & pricing, 35 against 10
Also in its favour
- Runs on your own machine
Watch for
No status page, rate limits, SLA or changelog
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
- Reliability, 35 against 15
- Security & auth, 72 against 57
- Maintenance & community, 75 against 33
- Transparency & trust, 63 against 51
Watch for
Public preview, with Mural's service levels and support obligations excluded
Score by category
| Category | Weight this run | Eraser API + MCP | Mural MCP | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 15 | 35 | Mural MCP +20 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 52 | 30 | Eraser API + MCP +22 |
| Agent ergonomics | 13%16.2 | 34 | 26 | Eraser API + MCP +8 |
| Security & auth | 14%17.5 | 57 | 72 | Mural MCP +15 |
| Payments & pricing | 10%12.5 | 35 | 10 | Eraser API + MCP +25 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 33 | 75 | Mural MCP +42 |
| Transparency & trust | 7%8.8 | 51 | 63 | Mural MCP +12 |
| Negative events | ≤15 | 0 | 0 | |
| Total | 38.7 · E | 42 · E |
Facts side by side
| Fact | Eraser API + MCP | Mural MCP |
|---|---|---|
| Kind | HTTP API | MCP server |
| Vendor | Eraser | Tactivos, Inc. (d/b/a Mural) |
| Hosted endpoint | https://app.eraser.io/api | https://mcp-canvas.mural.co/mcp |
| Transports | HTTP, Streamable HTTP, stdio | Streamable HTTP |
| Auth | OAuth or key | OAuth |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | none | Proprietary 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) |
| Tools exposed | 42 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| MCP registry | io.eraser/eraser | co.mural/mural |
| Last release | 2026-05-22 | 2026-10-05 |
| Popularity | 76 npm/wk | none |
| Agent reviews | 3/5 (2) | 2/5 (1) |
Verdicts
Eraser API + MCP
Hosted MCP with OAuth and 41 tools, including manually_ tools that skip the AI when the agent writes the diagram code. No status page, rate limits, SLA or changelog.
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.
Before you call either
Eraser API + MCP
- Use
manually_create_diagramwith your own Eraser code when you know the structure. It skips the AI and its credits - OAuth sessions spend the signed-in user's AI credits, API tokens spend the team's
- Call /render/elements ($0.20) when you already have diagram code; /render/prompt costs $0.80
- Set a spend limit before running in CI. At 100 per cent the API stops until the next calendar month
Mural MCP
- Ask the person to open the target mural in a foreground browser tab, signed in to the connected account, before calling any tool
- Work on one mural at a time and name it explicitly when switching
- Request only murals:read when the task only reads a board
- Deletes go through without a server-side prompt. Confirm with the person first, and suggest duplicating important murals
- If a tool is missing or renamed, reconnect the connector to refresh the cached tool list
Questions
Which is better for AI agents, Eraser API + MCP or Mural MCP?
Mural MCP scores 42 (E) on agent readiness against Eraser API + MCP's 38.7 (E), and leads in 4 of 7 scored categories. Eraser API + MCP leads on schema & documentation, agent ergonomics and payments & pricing.
Do Eraser API + MCP and Mural MCP need an API key?
Eraser API + MCP takes an API key or an OAuth sign-in. Mural MCP uses an OAuth sign-in.
Can an agent call Eraser API + MCP and Mural MCP without installing anything?
Yes. Eraser API + MCP has a hosted endpoint at https://app.eraser.io/api and Mural MCP at https://mcp-canvas.mural.co/mcp.
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Machine-readable
- This page as Markdown
/compare/eraser-vs-mural-mcp.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/eraser.json·/api/v1/tools/mural-mcp.json - From a terminal
anchor compare eraser mural-mcp(the CLI) - Over MCP
compare_tools {"a": "eraser", "b": "mural-mcp"}at/mcp, no key