Depending upon whether it is being invoked from the npm package @modelcontextprotocol/inspector or @modelcontextprotocol/inspector-cli the location of package.json will either be in ../ or ../../

* In cli/src/index.ts
  - load package.json from the parent folder or parent's parent depending on file existence in parent.
  - move the load of package.json into callMethod function, which is the only place it is used, and is closer to where it is referenced.

Author: cliffhall

cli/src/index.ts

@@ -1,5 +1,6 @@
 #!/usr/bin/env node
 
+import * as fs from "fs";
 import { Client } from "@modelcontextprotocol/sdk/client/index.js";
 import { Command } from "commander";
 import {
@@ -31,8 +32,6 @@ type JsonValue =
   | JsonValue[]
   | { [key: string]: JsonValue };
 
-import packageJson from "../../package.json" with { type: "json" };
-
 type Args = {
   target: string[];
   method?: string;
@@ -101,6 +100,15 @@ function createTransportOptions(
 }
 
 async function callMethod(args: Args): Promise<void> {
+  // Read package.json to get name and version for client identity
+  const pathA = "../package.json"; // We're in package @modelcontextprotocol/inspector-cli
+  const pathB = "../../package.json"; // We're in package @modelcontextprotocol/inspector
+  let packageJson: { name: string; version: string };
+  let packageJsonData = await import(fs.existsSync(pathA) ? pathA : pathB, {
+    with: { type: "json" },
+  });
+  packageJson = packageJsonData.default;
+
   const transportOptions = createTransportOptions(
     args.target,
     args.transport,