Merge pull request #334 from m-paternostro/mp/notifier

Capability notification for the MCP Server

Author: cliffhall

src/examples/server/simpleStreamableHttp.ts

@@ -12,6 +12,21 @@ const server = new McpServer({
   version: '1.0.0',
 }, { capabilities: { logging: {} } });
 
+// Log the capability invocation details
+server.onCapabilityChange((event) => {
+  switch (event.action) {
+    case 'invoked':
+      console.log(`${event.capabilityType} invocation ${event.invocationIndex}: '${event.capabilityName}' started`);
+      break;
+    case 'completed':
+      console.log(`${event.capabilityType} invocation ${event.invocationIndex}: '${event.capabilityName}' completed in ${event.durationMs}ms`);
+      break;
+    case 'error':
+      console.log(`${event.capabilityType} invocation ${event.invocationIndex}: '${event.capabilityName}' failed in ${event.durationMs}ms: ${event.error}`);
+      break;
+  }
+});
+
 // Register a simple tool that returns a greeting
 server.tool(
   'greet',
@@ -291,4 +306,4 @@ process.on('SIGINT', async () => {
   await server.close();
   console.log('Server shutdown complete');
   process.exit(0);
-});
+});

src/server/index.ts

@@ -104,6 +104,13 @@ export class Server<
     );
   }
 
+  /**
+   * The server's name and version.
+   */
+  getVersion(): { readonly name: string; readonly version: string } {
+    return this._serverInfo;
+  }
+
   /**
    * Registers new capabilities. This can only be called before connecting to a transport.
    *