Render, verify, describe, and safely edit Mermaid diagrams through MCP.
Agentic Mermaid MCP server is a hosted integration for AI assistants that speak the Model Context Protocol. Render, verify, describe, and safely edit Mermaid diagrams through MCP.
Agentic Mermaid is an open-source Mermaid toolkit for people who want AI agents to create diagrams that look finished: SVG and PNG renders, ASCII and Unicode for review, deterministic layout, and Style + Palette controls for brand colors, typography, strokes, fills, and backdrops.
Once Agentic Mermaid is connected, these are the calls the assistant has available:
Descriptor — registered diagram families** — built-ins and namespaced extensions share one discovery and capability contractAgent — native editing** — typed mutation for every registered renderable family; source-level round-trip only for opaque fallbacks containing unmodeledSelf — hosted (default).** agentic-mermaid-mcp runs a stdio server exposing execute (Code Mode sandbox), describe_sdk (one family's mutation schema onBeing a remote server, there is no local install. You register the endpoint with your client, authorise it once, and the tools appear.
Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Agentic Mermaid's toolset — Descriptor, Agent, Self — is a fair guide to whether it matches your workflow. It is maintained by adewale; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| Descriptor | registered diagram families** — built-ins and namespaced extensions share one discovery and capability contract. |
| Agent | native editing** — typed mutation for every registered renderable family; source-level round-trip only for opaque fallbacks containing unmodeled syntax. |
| Self | hosted (default).** agentic-mermaid-mcp runs a stdio server exposing execute (Code Mode sandbox), describe_sdk (one family's mutation schema on demand), render_png, and describe. Package runners can use npx -y agentic-me |
{
"mcpServers": {
"agentic-mermaid": {
"command": "npx",
"args": ["-y", "agentic-mermaid"]
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
Kill hallucinated APIs — version-accurate, up-to-date library documentation injected straight into context.
Microsoft's official browser automation server — drive a real browser through the accessibility tree, no screenshots needed.
GitHub's official server — repos, issues, pull requests, Actions and code security, straight from your assistant.
Issue tracking at the speed of conversation — Linear's official hosted server with OAuth and zero install.
Local repository surgery — status, diffs, commits, branches and history for any repo on disk.
Timezone sanity for AI — current time anywhere and correct conversions, without the model doing date math.