# Diagram

**Canonical:** https://apis.io/providers/diagram-la/  
**Website:** https://diagram.la/  
**APIs profiled:** 1

Diagram (diagram.la) is a hosted service for making and sharing diagrams drawn by AI. Users connect an AI tool such as Claude, ChatGPT, Claude Code, Codex, Cursor or Gemini CLI, describe a diagram in plain words, and the AI publishes it to Diagram through its MCP server or API, where it lives as an HTML page at a permanent private or public link; asking for a change updates the diagram at the same URL. It also supports publishing from CI, and its guides cover flowcharts, architecture, C4, ER, sequence and Mermaid diagrams.

## Kin Score — 50.5 / 100 (developing)

Scored 2026-11-06 under rubric 0.27.0.

| Facet | Score |
|---|---|
| Discoverability | 71.7 |
| Contract Quality | 42.9 |
| Contract Governance | 31.8 |
| Operational Transparency | 39.5 |
| Developer Ergonomics | 47.0 |
| Access Clarity | 65.8 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 22.7 (matched via fallback).

## Agent readiness — 47.6 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | served |
| Idempotency | documented |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | verified |
| Dynamic Client Registration | yes |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | distinct |
| MCP Tool Quality | na |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (3)

- **Diagram MCP Server** — Remote MCP server at https://diagram.la/mcp that lets AI tools save, edit, publish and fetch diagrams (documented tools include save_diagram, edit_diagram, publish_diagram, setu...
- **Diagram Diagrams API** — The Diagrams API from Diagram — 2 operation(s) for diagrams.
- **Diagram Projects API** — The Projects API from Diagram — 4 operation(s) for projects.

## MCP servers (1)

- **Diagram MCP Server** — Remote MCP server at diagram.la over streamable HTTP requiring OAuth; 13 tools listed.

## Agentic access (1)

- **Diagram La Agentic Access** — 11 operations · 6 acting

## Security (2)

- **Diagram La Authentication** — http/oauth2 · 3 schemes
- **Diagram La Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Diagram La Plans Pricing**

## Tags

Company, Diagramming, Visualization, Artificial Intelligence, MCP, Collaboration, Developer Tools

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/diagram-la/). Scores are computed from the provider's own public artifacts under a published rubric.