mcp-drawdb
About
Interact with drawdb database diagrams in the browser. Open https://drawdb.icen.ai/editor before using.
Details
- Author
- tovarsh
- Categories
- Database, Other, Knowledge Base
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Setup
Install mcp-drawdb in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/tovarsh/mcp-drawdb
Follow the installation instructions in the repository README, then restart your MCP client.
MCP server fordrawdb— lets AI assistants (Claude Code, Cursor, etc.) directly read and modify database diagrams in your browser.
Claude Code ──stdio──► npx mcp-drawdb ──ws──► Relay (embedded) ◄──ws── Browser (drawdb)
- npx mcp-drawdbstarts a WebSocket relay server internally (auto port 23432–23442), then connects as a client. If a relay is already running, it reuses it.
- drawdbin the browser auto-scans ports 23432–23442 to find the relay, exposes diagram state to tools
- The relay routes messages between Claude Code and the browser
No separate relay process needed — everything runs inside the MCP bridge.
Add to yourclaude_desktop_config.jsonor.claude/settings.json:
{ "mcpServers": { "drawdb": { "command": "npx", "args": ["mcp-drawdb"] } } }
Opendrawdb.icen.aiin your browser. You'll see a greenMCPdot in the header when connected.
Gray dot?The relay may be on a different port. The browser auto-scans 23432–23442, so just wait a moment. You can also click the MCP dot to manually set the WebSocket URL.
Claude Code can now read and modify your diagrams. Try:
"List all tables in the diagram" "Add a users table with id, email, name" "Create a relationship from users.id to posts.user_id" "Export SQL for MySQL"
When usingadd_table,update_table, each field supports:
HTTPS andws://localhost?All major browsers exempt localhost from mixed content checks.ws://localhostworks fromhttps://drawdb.icen.aiwithoutwss://.
Port 23432 is occupied?The relay auto-detects ports 23432–23442. The browser scans all ports automatically, so it will find the relay wherever it is.
For advanced setups (Docker, shared server), you can run the relay separately:
Then configure the bridge withRELAY_URL:
{ "mcpServers": { "drawdb": { "command": "npx", "args": ["mcp-drawdb"], "env": { "RELAY_URL": "ws://your-server:23432" } } } }
- Node.js >= 18
- drawdb with MCP integration (browser-side WebSocket client)
- A running browser tab with drawdb open
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