@modelcontextprotocol/sdk
Version:
Model Context Protocol implementation for TypeScript
56 lines • 2.15 kB
JavaScript
/**
* Example MCP server using Hono with WebStandardStreamableHTTPServerTransport
*
* This example demonstrates using the Web Standard transport directly with Hono,
* which works on any runtime: Node.js, Cloudflare Workers, Deno, Bun, etc.
*
* Run with: npx tsx src/examples/server/honoWebStandardStreamableHttp.ts
*/
import { Hono } from 'hono';
import { cors } from 'hono/cors';
import { serve } from '@hono/node-server';
import * as z from 'zod/v4';
import { McpServer } from '../../server/mcp.js';
import { WebStandardStreamableHTTPServerTransport } from '../../server/webStandardStreamableHttp.js';
// Create the MCP server
const server = new McpServer({
name: 'hono-webstandard-mcp-server',
version: '1.0.0'
});
// Register a simple greeting tool
server.registerTool('greet', {
title: 'Greeting Tool',
description: 'A simple greeting tool',
inputSchema: { name: z.string().describe('Name to greet') }
}, async ({ name }) => {
return {
content: [{ type: 'text', text: `Hello, ${name}! (from Hono + WebStandard transport)` }]
};
});
// Create a stateless transport (no options = no session management)
const transport = new WebStandardStreamableHTTPServerTransport();
// Create the Hono app
const app = new Hono();
// Enable CORS for all origins
app.use('*', cors({
origin: '*',
allowMethods: ['GET', 'POST', 'DELETE', 'OPTIONS'],
allowHeaders: ['Content-Type', 'mcp-session-id', 'Last-Event-ID', 'mcp-protocol-version'],
exposeHeaders: ['mcp-session-id', 'mcp-protocol-version']
}));
// Health check endpoint
app.get('/health', c => c.json({ status: 'ok' }));
// MCP endpoint
app.all('/mcp', c => transport.handleRequest(c.req.raw));
// Start the server
const PORT = process.env.MCP_PORT ? parseInt(process.env.MCP_PORT, 10) : 3000;
server.connect(transport).then(() => {
console.log(`Starting Hono MCP server on port ${PORT}`);
console.log(`Health check: http://localhost:${PORT}/health`);
console.log(`MCP endpoint: http://localhost:${PORT}/mcp`);
serve({
fetch: app.fetch,
port: PORT
});
});
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