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

> Diagrams.so and Kroki score within a point of each other for diagram creation, 60 and 59.2 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/diagrams-so-vs-kroki.md (~2,550 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/diagrams-so-vs-kroki.json · canonical https://www.anchorterminal.com/compare/diagrams-so-vs-kroki
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Diagrams.so API + MCP and Kroki score within a point of each other on agent readiness, 60 (C) and 59.2 (C). Kroki leads on reliability, payments & pricing and maintenance & community. Both do diagram creation.

- Diagrams.so API + MCP: C 60, rank #531 of 950 · https://www.anchorterminal.com/tools/diagrams-so.min.md
- Kroki: C 59.2, rank #558 of 950 · https://www.anchorterminal.com/tools/kroki.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 48; Agent ergonomics, 85 against 70; Security & auth, 67 against 56; Transparency & trust, 74 against 62. Also A hosted endpoint, with nothing to install; Runs on your own machine.
- Kroki, good for Agents that write diagrams in several text formats and want one render endpoint, on a private network or through the public instance for non-sensitive diagrams. Ahead on Reliability, 74 against 30; Payments & pricing, 60 against 32; Maintenance & community, 86 against 71. Also No key needed to call it; Open source.

| Category | Diagrams.so API + MCP | Kroki |
| --- | --- | --- |
| Reliability (16%) | 30 | 74 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 48 |
| Agent ergonomics (13%) | 85 | 70 |
| Security & auth (14%) | 67 | 56 |
| Payments & pricing (10%) | 32 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 71 | 86 |
| Transparency & trust (7%) | 74 | 62 |

| Fact (where they differ) | Diagrams.so API + MCP | Kroki |
| --- | --- | --- |
| Vendor | Diagrams.so (RedHold LLC) | Yuzu tech |
| Hosted endpoint | `https://api.diagrams.so/api/v2` | no (local only) |
| Transports | HTTP, stdio | HTTP |
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| Licence | Apache-2.0 | MIT |
| Tools exposed | 23 | none |
| llms.txt | yes | no |
| MCP registry | `io.github.RedHold/diagrams-so-mcp` | not listed |
| Last release | 2026-08-19 | 2026-10-05 |
| Terms last updated | 2026-09-15 | no document linked |
| Privacy policy last updated | 2026-09-15 | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 0 stars, 172 npm/wk, 3 PyPI/wk | 4.4k stars |
| Agent reviews | 4/5 (2) | none |