miEAA3 MCP Server

#!/usr/bin/env node import open from "open"; import { resolve, dirname } from "path"; import { spawnPromise, spawn } from "spawn-rx"; import { fileURLToPath } from "url"; import { randomBytes } from "crypto"; const __dirname = dirname(fileURLToPath(import.meta.url)); const DEFAULT_MCP_PROXY_LISTEN_PORT = "6277"; function delay(ms) { return new Promise((resolve) => setTimeout(resolve, ms, true)); } function getClientUrl(port, authDisabled, sessionToken, serverPort) { const host = process.env.HOST || "localhost"; const baseUrl = `http://${host}:${port}`; const params = new URLSearchParams(); if (serverPort && serverPort !== DEFAULT_MCP_PROXY_LISTEN_PORT) { params.set("MCP_PROXY_PORT", serverPort); } if (!authDisabled) { params.set("MCP_PROXY_AUTH_TOKEN", sessionToken); } return params.size > 0 ? `${baseUrl}/?${params.toString()}` : baseUrl; } async function startDevServer(serverOptions) { const { SERVER_PORT, CLIENT_PORT, sessionToken, envVars, abort, transport, serverUrl, } = serverOptions; const serverCommand = "npx"; const serverArgs = ["tsx", "watch", "--clear-screen=false", "src/index.ts"]; const isWindows = process.platform === "win32"; const spawnOptions = { cwd: resolve(__dirname, "../..", "server"), env: { ...process.env, SERVER_PORT, CLIENT_PORT, MCP_PROXY_AUTH_TOKEN: sessionToken, MCP_ENV_VARS: JSON.stringify(envVars), ...(transport ? { MCP_TRANSPORT: transport } : {}), ...(serverUrl ? { MCP_SERVER_URL: serverUrl } : {}), }, signal: abort.signal, echoOutput: true, }; // For Windows, we need to use stdin: 'ignore' to simulate < NUL if (isWindows) { spawnOptions.stdin = "ignore"; } const server = spawn(serverCommand, serverArgs, spawnOptions); // Give server time to start const serverOk = await Promise.race([ new Promise((resolve) => { server.subscribe({ complete: () => resolve(false), error: () => resolve(false), next: () => {}, // We're using echoOutput }); }), delay(3000).then(() => true), ]); return { server, serverOk }; } async function startProdServer(serverOptions) { const { SERVER_PORT, CLIENT_PORT, sessionToken, envVars, abort, command, mcpServerArgs, transport, serverUrl, } = serverOptions; const inspectorServerPath = resolve( __dirname, "../..", "server", "build", "index.js", ); const server = spawnPromise( "node", [ inspectorServerPath, ...(command ? [`--command=${command}`] : []), ...(mcpServerArgs && mcpServerArgs.length > 0 ? [`--args=${mcpServerArgs.join(" ")}`] : []), ...(transport ? [`--transport=${transport}`] : []), ...(serverUrl ? [`--server-url=${serverUrl}`] : []), ], { env: { ...process.env, SERVER_PORT, CLIENT_PORT, MCP_PROXY_AUTH_TOKEN: sessionToken, MCP_ENV_VARS: JSON.stringify(envVars), }, signal: abort.signal, echoOutput: true, }, ); // Make sure server started before starting client const serverOk = await Promise.race([server, delay(2 * 1000)]); return { server, serverOk }; } async function startDevClient(clientOptions) { const { CLIENT_PORT, SERVER_PORT, authDisabled, sessionToken, abort, cancelled, } = clientOptions; const clientCommand = "npx"; const host = process.env.HOST || "localhost"; const clientArgs = ["vite", "--port", CLIENT_PORT, "--host", host]; const client = spawn(clientCommand, clientArgs, { cwd: resolve(__dirname, ".."), env: { ...process.env, CLIENT_PORT }, signal: abort.signal, echoOutput: true, }); const url = getClientUrl( CLIENT_PORT, authDisabled, sessionToken, SERVER_PORT, ); // Give vite time to start before opening or logging the URL setTimeout(() => { console.log(`\n🚀 MCP Inspector is up and running at:\n ${url}\n`); if (process.env.MCP_AUTO_OPEN_ENABLED !== "false") { console.log("🌐 Opening browser..."); open(url); } }, 3000); await new Promise((resolve) => { client.subscribe({ complete: resolve, error: (err) => { if (!cancelled || process.env.DEBUG) { console.error("Client error:", err); } resolve(null); }, next: () => {}, // We're using echoOutput }); }); } async function startProdClient(clientOptions) { const { CLIENT_PORT, SERVER_PORT, authDisabled, sessionToken, abort, cancelled, } = clientOptions; const inspectorClientPath = resolve( __dirname, "../..", "client", "bin", "client.js", ); const url = getClientUrl( CLIENT_PORT, authDisabled, sessionToken, SERVER_PORT, ); await spawnPromise("node", [inspectorClientPath], { env: { ...process.env, CLIENT_PORT, INSPECTOR_URL: url, }, signal: abort.signal, echoOutput: true, }); } async function main() { // Parse command line arguments const args = process.argv.slice(2); const envVars = {}; const mcpServerArgs = []; let command = null; let parsingFlags = true; let isDev = false; let transport = null; let serverUrl = null; for (let i = 0; i < args.length; i++) { const arg = args[i]; if (parsingFlags && arg === "--") { parsingFlags = false; continue; } if (parsingFlags && arg === "--dev") { isDev = true; continue; } if (parsingFlags && arg === "--transport" && i + 1 < args.length) { transport = args[++i]; continue; } if (parsingFlags && arg === "--server-url" && i + 1 < args.length) { serverUrl = args[++i]; continue; } if (parsingFlags && arg === "-e" && i + 1 < args.length) { const envVar = args[++i]; const equalsIndex = envVar.indexOf("="); if (equalsIndex !== -1) { const key = envVar.substring(0, equalsIndex); const value = envVar.substring(equalsIndex + 1); envVars[key] = value; } else { envVars[envVar] = ""; } } else if (!command && !isDev) { command = arg; } else if (!isDev) { mcpServerArgs.push(arg); } } const CLIENT_PORT = process.env.CLIENT_PORT ?? "6274"; const SERVER_PORT = process.env.SERVER_PORT ?? DEFAULT_MCP_PROXY_LISTEN_PORT; console.log( isDev ? "Starting MCP inspector in development mode..." : "Starting MCP inspector...", ); // Use provided token from environment or generate a new one const sessionToken = process.env.MCP_PROXY_AUTH_TOKEN || randomBytes(32).toString("hex"); const authDisabled = !!process.env.DANGEROUSLY_OMIT_AUTH; const abort = new AbortController(); let cancelled = false; process.on("SIGINT", () => { cancelled = true; abort.abort(); }); let server, serverOk; try { const serverOptions = { SERVER_PORT, CLIENT_PORT, sessionToken, envVars, abort, command, mcpServerArgs, transport, serverUrl, }; const result = isDev ? await startDevServer(serverOptions) : await startProdServer(serverOptions); server = result.server; serverOk = result.serverOk; } catch (error) {} if (serverOk) { try { const clientOptions = { CLIENT_PORT, SERVER_PORT, authDisabled, sessionToken, abort, cancelled, }; await (isDev ? startDevClient(clientOptions) : startProdClient(clientOptions)); } catch (e) { if (!cancelled || process.env.DEBUG) throw e; } } return 0; } main() .then((_) => process.exit(0)) .catch((e) => { console.error(e); process.exit(1); });