chore(internal): fix MCP cloudflare worker builds

Author: stainless-app[bot]

packages/mcp-server/cloudflare-worker/package.json

@@ -18,10 +18,22 @@
   },
   "dependencies": {
     "@cloudflare/workers-oauth-provider": "^0.0.5",
-    "@modelcontextprotocol/sdk": "^1.27.1",
-    "agents": "^0.8.5",
+    "@modelcontextprotocol/sdk": "1.28.0",
+    "agents": "~0.8.7",
     "hono": "^4.12.4",
     "@imagekit/api-mcp": "latest",
-    "zod": "^3.24.4"
+    "@imagekit/nodejs": "latest"
+  },
+  "// overrides": "agents pins @modelcontextprotocol/sdk exactly; the three override blocks below force npm/yarn/pnpm to dedupe to that same version. Keep all four @modelcontextprotocol/sdk values in sync. See src/index.ts for the full rationale.",
+  "overrides": {
+    "@modelcontextprotocol/sdk": "1.28.0"
+  },
+  "resolutions": {
+    "@modelcontextprotocol/sdk": "1.28.0"
+  },
+  "pnpm": {
+    "overrides": {
+      "@modelcontextprotocol/sdk": "1.28.0"
+    }
   }
 }

packages/mcp-server/cloudflare-worker/src/index.ts

@@ -1,7 +1,15 @@
 import { makeOAuthConsent } from './app';
+// `agents` and `@modelcontextprotocol/sdk` versions must stay in sync with the
+// pins/overrides in package.json. `agents` declares an exact pin on
+// `@modelcontextprotocol/sdk`; if our resolved version drifts, npm installs a
+// second copy under `agents/node_modules/`, and `initMcpServer`'s runtime
+// `instanceof McpServer` check fails because the two `McpServer` classes are
+// distinct constructors.
 import { McpAgent } from 'agents/mcp';
 import OAuthProvider from '@cloudflare/workers-oauth-provider';
-import { McpOptions, initMcpServer, server, ClientOptions } from '@imagekit/api-mcp/server';
+import { ClientOptions } from '@imagekit/nodejs';
+import { McpOptions } from '@imagekit/api-mcp/options';
+import { initMcpServer, newMcpServer } from '@imagekit/api-mcp/server';
 import type { ExportedHandler } from '@cloudflare/workers-types';
 
 type MCPProps = {
@@ -51,11 +59,15 @@ const serverConfig: ServerConfig = {
 };
 
 export class MyMCP extends McpAgent<Env, unknown, MCPProps> {
-  server = server;
+  server = newMcpServer({});
 
   async init() {
+    if (this.props == null) {
+      throw new Error('MCP props are not initialized');
+    }
+
     initMcpServer({
-      server: this.server,
+      server: await this.server,
       clientOptions: this.props.clientProps,
       mcpOptions: this.props.clientConfig,
     });