MCP Hello World

import type { FastifyInstance, FastifyRequest, FastifyReply } from 'fastify'; import { register } from '../utils/metrics.js'; export async function metricsRoutes(fastify: FastifyInstance) { fastify.get('/metrics', async (_request, reply) => { const metrics = await register.metrics(); reply .header('Content-Type', register.contentType) .send(metrics); }); // Handle other HTTP methods with helpful error const methodNotAllowedHandler = async (_request: FastifyRequest, reply: FastifyReply) => { reply.status(405).send({ error: { message: 'Method Not Allowed. Use GET for metrics.', code: 405, allowed_methods: ['GET'] } }); }; fastify.post('/metrics', methodNotAllowedHandler); fastify.put('/metrics', methodNotAllowedHandler); fastify.delete('/metrics', methodNotAllowedHandler); fastify.patch('/metrics', methodNotAllowedHandler); }