# Diagrams.so API + MCP vs Mermaid Chart MCP (slim)

> Diagrams.so API + MCP has a score of 60.1 (C) against Mermaid Chart MCP's 31.7 (F). Both do diagram create. The largest gap is schema & documentation, 53 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/diagrams-so-vs-mermaid-chart.md (~1,600 tokens) · this version ~380 tokens · JSON https://www.anchorterminal.com/compare/diagrams-so-vs-mermaid-chart.json · canonical https://www.anchorterminal.com/compare/diagrams-so-vs-mermaid-chart
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-04

Diagrams.so API + MCP has a score of 60.1 (C) against Mermaid Chart MCP's 31.7 (F). Both do diagram create. The largest gap is schema & documentation, 53 points.

- Diagrams.so API + MCP: C 60.1, rank #255 of 452 · https://www.anchorterminal.com/tools/diagrams-so.min.md
- Mermaid Chart MCP: F 31.7, rank #442 of 452 · https://www.anchorterminal.com/tools/mermaid-chart.min.md
- Pick Diagrams.so API + MCP for reliability (+15), schema & documentation (+53), agent ergonomics (+51), security & auth (+47), maintenance & community (+18), transparency & trust (+27). Pick Mermaid Chart MCP for payments & pricing (+13).

| Category | Diagrams.so API + MCP | Mermaid Chart MCP |
| --- | --- | --- |
| Reliability (16%) | 30 | 15 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 32 |
| Agent ergonomics (13%) | 85 | 34 |
| Security & auth (14%) | 67 | 20 |
| Payments & pricing (10%) | 32 | 45 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 71 | 53 |
| Transparency & trust (7%) | 75 | 48 |