Implement auto-open feature for browser launch on server start

Author: moeki0

README.md

@@ -54,6 +54,7 @@ The MCP Inspector supports the following configuration settings. To change them
 | -------------------------- | ----------------------------------------------------------------------------------------- | ------------- |
 | MCP_SERVER_REQUEST_TIMEOUT | Maximum time in milliseconds to wait for a response from the MCP server before timing out | 10000         |
 | MCP_PROXY_FULL_ADDRESS     | The full URL of the MCP Inspector proxy server (e.g. `http://10.2.1.14:2277`)             | `null`        |
+| MCP_AUTO_OPEN_DISABLED     | Disable automatic browser opening when inspector starts                                   | `false`       |
 
 ### From this repository
 

bin/cli.js

@@ -1,5 +1,6 @@
 #!/usr/bin/env node
 
+import open from "open";
 import { resolve, dirname } from "path";
 import { spawnPromise } from "spawn-rx";
 import { fileURLToPath } from "url";
@@ -99,6 +100,9 @@ async function main() {
 
   if (serverOk) {
     try {
+      if (!process.env.MCP_AUTO_OPEN_DISABLED) {
+        open(`http://localhost:${CLIENT_PORT}`);
+      }
       await spawnPromise("node", [inspectorClientPath], {
         env: { ...process.env, PORT: CLIENT_PORT },
         signal: abort.signal,
@@ -113,7 +117,7 @@ async function main() {
 }
 
 main()
-  .then((_) => process.exit(0))
+  .then(() => process.exit(0))
   .catch((e) => {
     console.error(e);
     process.exit(1);

package-lock.json

@@ -39,6 +39,7 @@
     "@modelcontextprotocol/inspector-client": "^0.8.1",
     "@modelcontextprotocol/inspector-server": "^0.8.1",
     "concurrently": "^9.0.1",
+    "open": "^10.1.0",
     "shell-quote": "^1.8.2",
     "spawn-rx": "^5.1.2",
     "ts-node": "^10.9.2"