60 lines
2.3 KiB
JavaScript
60 lines
2.3 KiB
JavaScript
/**
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* Example MCP server using Hono with WebStandardStreamableHTTPServerTransport
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*
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* This example demonstrates using the Web Standard transport directly with Hono,
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* which works on any runtime: Node.js, Cloudflare Workers, Deno, Bun, etc.
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*
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* Run with: npx tsx src/examples/server/honoWebStandardStreamableHttp.ts
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*/
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import { Hono } from 'hono';
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import { cors } from 'hono/cors';
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import { serve } from '@hono/node-server';
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import * as z from 'zod/v4';
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import { McpServer } from '../../server/mcp.js';
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import { WebStandardStreamableHTTPServerTransport } from '../../server/webStandardStreamableHttp.js';
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// Factory function to create a new MCP server per request (stateless mode)
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const getServer = () => {
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const server = new McpServer({
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name: 'hono-webstandard-mcp-server',
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version: '1.0.0'
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});
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// Register a simple greeting tool
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server.registerTool('greet', {
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title: 'Greeting Tool',
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description: 'A simple greeting tool',
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inputSchema: { name: z.string().describe('Name to greet') }
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}, async ({ name }) => {
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return {
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content: [{ type: 'text', text: `Hello, ${name}! (from Hono + WebStandard transport)` }]
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};
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});
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return server;
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};
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// Create the Hono app
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const app = new Hono();
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// Enable CORS for all origins
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app.use('*', cors({
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origin: '*',
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allowMethods: ['GET', 'POST', 'DELETE', 'OPTIONS'],
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allowHeaders: ['Content-Type', 'mcp-session-id', 'Last-Event-ID', 'mcp-protocol-version'],
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exposeHeaders: ['mcp-session-id', 'mcp-protocol-version']
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}));
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// Health check endpoint
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app.get('/health', c => c.json({ status: 'ok' }));
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// MCP endpoint - create a fresh transport and server per request (stateless)
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app.all('/mcp', async (c) => {
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const transport = new WebStandardStreamableHTTPServerTransport();
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const server = getServer();
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await server.connect(transport);
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return transport.handleRequest(c.req.raw);
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});
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// Start the server
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const PORT = process.env.MCP_PORT ? parseInt(process.env.MCP_PORT, 10) : 3000;
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console.log(`Starting Hono MCP server on port ${PORT}`);
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console.log(`Health check: http://localhost:${PORT}/health`);
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console.log(`MCP endpoint: http://localhost:${PORT}/mcp`);
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serve({
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fetch: app.fetch,
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port: PORT
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});
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//# sourceMappingURL=honoWebStandardStreamableHttp.js.map
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