Hono MCP Integration

Edge-native tool deployment

Agents often fire off dozens of parallel tool calls. High-latency backends slow down the entire chain. Hono on the edge is the perfect fast-boot runtime, but building the transport for MCP (SSE or WebSockets) in Cloudflare Workers can be tricky.

Instead of dealing with edge protocols, just use @hono/zod-openapi. wmcp.sh itself is built on this exact stack—we proxy your edge routes safely and expose them as standard agent tools.

Hono Zod to Agent MCP

// TypeScript - Hono Zod OpenAPI
import { OpenAPIHono, createRoute, z } from '@hono/zod-openapi';

const app = new OpenAPIHono();

const addRoute = createRoute({
  method: 'post',
  path: '/add',
  tags: ['math'],
  request: {
    body: {
      content: { 'application/json': { schema: z.object({ a: z.number(), b: z.number() }) } }
    }
  },
  responses: { 200: { description: 'Result' } }
});

app.openapi(addRoute, (c) => {
  const { a, b } = c.req.valid('json');
  return c.json({ result: a + b });
});

app.doc('/openapi.json', { openapi: '3.0.0', info: { title: 'Math', version: '1.0.0' } });
// Just point wmcp.sh to /openapi.json

Hono Zod vs Standard MCP

Common questions.