Garmin MCP App

/** * Boots the real MCP server and an in-memory MCP client within the Vite dev * server process. The client is lazy-initialized on first request and reused * for all subsequent tool calls. * * InMemoryTransport.createLinkedPair() creates a paired transport so the * client and server communicate directly without stdio or network. * * Important: the server must connect before the client — client.connect() * sends an `initialize` request and blocks until the server responds. */ import { Client } from "@modelcontextprotocol/sdk/client/index.js"; import { InMemoryTransport } from "@modelcontextprotocol/sdk/inMemory.js"; import { createServer } from "./server.js"; let client: Client | null = null; export async function getDevClient(): Promise<Client> { if (client) return client; const server = createServer("dev"); const [clientTransport, serverTransport] = InMemoryTransport.createLinkedPair(); // Server must listen before client connects, otherwise the client's // initialize request has no listener and times out after 60s. await server.connect(serverTransport); client = new Client({ name: "dev-client", version: "0.0.0" }); await client.connect(clientTransport); return client; }