@endiagram/mcp

MCP server for EN Diagram — structural analysis powered by deterministic graph algorithms.

Write your system in plain text. Get back structural facts: bottlenecks, blast radius, flow landmarks, concurrency groups, and more. No AI inside the computation — every result is deterministic.

Installation

Run directly:

npx @endiagram/mcp

Or install globally:

npm install -g @endiagram/mcp

Configuration

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "en-diagram": {
      "command": "npx",
      "args": ["@endiagram/mcp"]
    }
  }
}

Claude Code

claude mcp add en-diagram npx @endiagram/mcp

Environment Variables

Variable	Default	Description
EN_API_URL	https://api.endiagram.com	API endpoint for the EN Diagram service

Tools

Tool	Description
analyze_system	Structural signal — computes topology, roles, antipatterns from EN source
render	Render a dependency graph as publication-quality SVG
detail	Deep structural analysis — concurrency, flow landmarks, resilience, dominator tree, min-cuts
distance	Shortest path between two nodes with subsystem crossing annotations
diff	Structural diff between two systems — topology, role, and subsystem changes
trace	Follow directed flow from node A to node B with role and subsystem annotations
extract	Extract a named subsystem as standalone EN source code
impact	Blast radius — remove a node and see what disconnects
evolve	Dry-run architectural changes — apply a patch and see the structural delta
between	Betweenness centrality — what fraction of all shortest paths flow through a node
categorize	Auto-discover subsystem boundaries from dependency structure
compose	Merge two EN graphs into one with entity linking

EN Syntax

Customer do: place order needs: menu yields: order
Kitchen do: prepare food needs: order yields: meal
Waiter do: deliver needs: meal yields: served customer

Learn more at endiagram.com.

License

MIT