40 lines
1.6 KiB
TypeScript
40 lines
1.6 KiB
TypeScript
/**
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* Declares one extension capability, `com.example/feature-flags`, with a small
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* settings object. The entry is advertised to every peer — by the `initialize`
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* result on legacy connections and by `server/discover` on modern ones.
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*
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* One binary, either transport — selected by `--http --port <N>` (defaults to
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* stdio). See `examples/CONTRIBUTING.md` for the canonical shape.
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*/
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import { serve } from '@hono/node-server';
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import { parseExampleArgs } from '@mcp-examples/shared';
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import { createMcpHonoApp } from '@modelcontextprotocol/hono';
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import { createMcpHandler, McpServer } from '@modelcontextprotocol/server';
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import { serveStdio } from '@modelcontextprotocol/server/stdio';
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function buildServer(): McpServer {
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const mcp = new McpServer({ name: 'extension-capabilities-server', version: '1.0.0' });
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// Declare the extension and its settings before connecting.
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mcp.server.registerCapabilities({
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extensions: { 'com.example/feature-flags': { flags: ['dark-mode', 'beta-search'] } }
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});
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return mcp;
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}
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const { transport, port } = parseExampleArgs();
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if (transport === 'stdio') {
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void serveStdio(buildServer);
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console.error('[server] serving over stdio');
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} else {
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const handler = createMcpHandler(buildServer);
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// `createMcpHonoApp()` arms localhost host/origin validation by default;
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// bind loopback explicitly to match.
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const app = createMcpHonoApp();
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app.all('/mcp', c => handler.fetch(c.req.raw));
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serve({ fetch: app.fetch, port, hostname: '127.0.0.1' }, () => {
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console.error(`[server] listening on http://127.0.0.1:${port}/mcp`);
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});
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}
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