42 lines
1.7 KiB
TypeScript
42 lines
1.7 KiB
TypeScript
/**
|
|
* `supportedProtocolVersions`: support a protocol version not yet in the SDK.
|
|
* The first version in the list is the fallback when the client requests an
|
|
* unsupported one. One binary, either transport.
|
|
*/
|
|
import { serve } from '@hono/node-server';
|
|
import { parseExampleArgs } from '@mcp-examples/shared';
|
|
import { createMcpHonoApp } from '@modelcontextprotocol/hono';
|
|
import { createMcpHandler, McpServer, SUPPORTED_PROTOCOL_VERSIONS } from '@modelcontextprotocol/server';
|
|
import { serveStdio } from '@modelcontextprotocol/server/stdio';
|
|
|
|
// Add support for a newer protocol version (first in list is fallback).
|
|
const CUSTOM_VERSIONS = ['2026-01-01', ...SUPPORTED_PROTOCOL_VERSIONS];
|
|
|
|
function buildServer(): McpServer {
|
|
const server = new McpServer(
|
|
{ name: 'custom-protocol-server', version: '1.0.0' },
|
|
{ supportedProtocolVersions: CUSTOM_VERSIONS, capabilities: { tools: {} } }
|
|
);
|
|
|
|
server.registerTool('get-protocol-info', { description: 'Returns protocol version configuration' }, async () => ({
|
|
content: [{ type: 'text', text: JSON.stringify({ supportedVersions: CUSTOM_VERSIONS }) }]
|
|
}));
|
|
|
|
return server;
|
|
}
|
|
|
|
const { transport, port } = parseExampleArgs();
|
|
|
|
if (transport === 'stdio') {
|
|
void serveStdio(buildServer);
|
|
console.error('[server] serving over stdio');
|
|
} else {
|
|
const handler = createMcpHandler(buildServer);
|
|
// `createMcpHonoApp()` binds the endpoint behind localhost host/origin
|
|
// validation by default, matching the framework factories' defaults.
|
|
const app = createMcpHonoApp();
|
|
app.all('/mcp', c => handler.fetch(c.req.raw));
|
|
serve({ fetch: app.fetch, port, hostname: '127.0.0.1' }, () => {
|
|
console.error(`[server] listening on http://127.0.0.1:${port}/mcp`);
|
|
});
|
|
}
|