workaround

Author: pavelgj

genkit-tools/cli/src/mcp/server.ts

@@ -22,6 +22,7 @@ import { StreamableHTTPServerTransport } from '@modelcontextprotocol/sdk/server/
 import { isInitializeRequest } from '@modelcontextprotocol/sdk/types.js';
 import * as clc from 'colorette';
 import express from 'express';
+import getPort, { makeRange } from 'get-port';
 import { randomUUID } from 'node:crypto';
 import { defineDocsTool } from '../mcp/docs';
 import { defineFlowTools } from './flows';
@@ -31,7 +32,9 @@ export async function startMcpServer(
   rawPort: string | undefined,
   manager?: RuntimeManager
 ) {
-  const port = rawPort ? Number.parseInt(rawPort) : 4001;
+  const port = rawPort
+    ? Number.parseInt(rawPort)
+    : await getPort({ port: makeRange(4100, 4199) });
   const server = new McpServer({
     name: 'Genkit MCP',
     version: '0.0.1',

genkit-tools/common/src/server/server.ts

@@ -117,7 +117,7 @@ export function startServer(manager: RuntimeManager, port: number) {
     trpcExpress.createExpressMiddleware({
       router: TOOLS_SERVER_ROUTER(manager),
       maxBodySize: MAX_PAYLOAD_SIZE,
-    })
+    }) as any // x-package express version mismatch, casting to any.
   );
 
   app.all('*', (_, res) => {