Serverless MCP

import createError from 'http-errors'; import { createMiddlewareLambdaFunctionURLHandler, getLambdaFunctionURLContext, getProcessEnv, lambdaFunctionURLHandler, MiddlewareLambdaFunctionURLHandler, } from '#middleware'; import { createJsonResponse } from '#utils'; export type MetadataResponse = { resource: string; authorization_servers: string[]; scopes_supported: string[]; bearer_methods_supported: string[]; }; export const baseHandler: MiddlewareLambdaFunctionURLHandler = async ( _event, context ) => { const { method } = getLambdaFunctionURLContext(context); const domainName = getProcessEnv('DOMAIN_NAME', 'no domain name given'); switch (method) { case 'OPTIONS': return { statusCode: 204, headers: { 'Content-Type': 'application/json' }, }; case 'GET': // Return successful response return createJsonResponse<MetadataResponse>(200, { authorization_servers: [`https://${domainName}`], bearer_methods_supported: ['header'], resource: `https://${domainName}`, scopes_supported: ['openid', 'profile', 'phone', 'email'], }); default: throw new createError.MethodNotAllowed(); } }; export const handler = createMiddlewareLambdaFunctionURLHandler( baseHandler ).use( lambdaFunctionURLHandler({ methods: ['GET', 'OPTIONS'], urlPattern: '/.well-known/oauth-protected-resource', }) );