ExpressJS MCP

# Usage Install - pnpm i - pnpm build Mount mode ```ts import { ExpressMCP } from 'expressjs-mcp'; const mcp = new ExpressMCP(app, { mountPath: '/mcp', openapi }); // openapi optional await mcp.init(); mcp.mount('/mcp'); // GET /mcp/tools → list; POST /mcp/invoke → { toolName, args } ``` Standalone HTTP gateway ```ts const mcp = new ExpressMCP(app); await mcp.init(); await mcp.startStandalone({ port: 7878 }); ``` Per-route annotations (zod) ```ts import { z } from 'zod'; const schemaAnnotations = { 'POST /order': { description: 'Create order', input: z.object({ productId: z.string(), qty: z.number().int().positive().default(1) }), output: z.object({ id: z.string(), productId: z.string(), qty: z.number().int() }) } }; const mcp = new ExpressMCP(app, { schemaAnnotations }); ``` Tool naming - `title`: `"METHOD /path"`, `name`: `"METHOD_/path"` (spaces replaced with `_`).