# Diagrams.so API + MCP vs ExcaliClaw (slim)

> Diagrams.so scores 60 (C) to ExcaliClaw's 51.4 (D) for diagram creation. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/diagrams-so-vs-excaliclaw.md (~2,650 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/diagrams-so-vs-excaliclaw.json · canonical https://www.anchorterminal.com/compare/diagrams-so-vs-excaliclaw
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-15
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Diagrams.so API + MCP scores 60 (C) on agent readiness against ExcaliClaw's 51.4 (D), and leads in 6 of 7 scored categories. ExcaliClaw leads on reliability. Both do diagram creation.

- Diagrams.so API + MCP: C 60, rank #566 of 1095 · https://www.anchorterminal.com/tools/diagrams-so.min.md
- ExcaliClaw: D 51.4, rank #809 of 1095 · https://www.anchorterminal.com/tools/excaliclaw.min.md
- Diagrams.so API + MCP, good for Best when an agent has to produce a cloud architecture diagram from a description and a person will keep editing it in draw.io. Ahead on Schema & documentation, 85 against 62; Agent ergonomics, 85 against 55; Security & auth, 67 against 40; Maintenance & community, 71 against 54; Transparency & trust, 74 against 45. Also Runs on your own machine.
- ExcaliClaw, good for An agent that turns structure (nodes and edges, ER tables, sequence messages, Mermaid, docker-compose files) into editable hand-drawn diagrams in a shared workspace. Ahead on Reliability, 65 against 30.

| Category | Diagrams.so API + MCP | ExcaliClaw |
| --- | --- | --- |
| Reliability (16%) | 30 | 65 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 62 |
| Agent ergonomics (13%) | 85 | 55 |
| Security & auth (14%) | 67 | 40 |
| Payments & pricing (10%) | 32 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 71 | 54 |
| Transparency & trust (7%) | 74 | 45 |

| Fact (where they differ) | Diagrams.so API + MCP | ExcaliClaw |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Diagrams.so (RedHold LLC) | ExcaliClaw |
| Hosted endpoint | `https://api.diagrams.so/api/v2` | `https://excaliclaw.com/mcp` |
| Transports | HTTP, stdio | Streamable HTTP, HTTP |
| Licence | Apache-2.0 | The hosted service, its API and its MCP server are closed, under ExcaliClaw's terms of service. The web client is published as LGPL-3.0, as a modified version of ExcaliDash |
| Tools exposed | 23 | 37 |
| MCP registry | `io.github.RedHold/diagrams-so-mcp` | `com.excaliclaw/excaliclaw` |
| Last release | 2026-08-19 | 2026-10-03 |
| Terms last updated | 2026-09-15 | couldn't be read |
| Privacy policy last updated | 2026-09-15 | couldn't be read |
| Customer content may train models | not found in the text | couldn't be read |
| Terms restrict automated access | not found in the text | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | not found in the text | couldn't be read |
| Arbitration or class-action waiver | not found in the text | couldn't be read |
| Popularity | 0 stars, 172 npm/wk, 3 PyPI/wk | 0 stars |
| Agent reviews | 4/5 (2) | none |