diff --git a/package.json b/package.json
index 8be8f1002..ab3624f9b 100644
--- a/package.json
+++ b/package.json
@@ -100,4 +100,4 @@
   "resolutions": {
     "strip-ansi": "6.0.1"
   }
-}
\ No newline at end of file
+}
diff --git a/src/cli.ts b/src/cli.ts
index f580a624f..fd15b259d 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -73,6 +73,7 @@ async function runServer(port: number | null) {
           version: "0.1.0",
         },
         {
+        
           capabilities: {},
         },
       );
@@ -142,6 +143,7 @@ switch (command) {
     }
 
     runClient(args[1], args.slice(2)).catch((error) => {
+      console.log("hi")
       console.error(error);
       process.exit(1);
     });
@@ -150,7 +152,9 @@ switch (command) {
 
   case "server": {
     const port = args[1] ? parseInt(args[1]) : null;
+    
     runServer(port).catch((error) => {
+     
       console.error(error);
       process.exit(1);
     });
diff --git a/src/client/streamableHttp.ts b/src/client/streamableHttp.ts
index 12714ea44..84fc52207 100644
--- a/src/client/streamableHttp.ts
+++ b/src/client/streamableHttp.ts
@@ -208,6 +208,7 @@ export class StreamableHTTPClientTransport implements Transport {
       }
 
       const response = await (this._fetch ?? fetch)(this._url, {
+        ...this._requestInit,
         method: "GET",
         headers,
         signal: this._abortController?.signal,
diff --git a/src/examples/client/multipleClientsParallel.ts b/src/examples/client/multipleClientsParallel.ts
index cc01fc06e..276766ba9 100644
--- a/src/examples/client/multipleClientsParallel.ts
+++ b/src/examples/client/multipleClientsParallel.ts
@@ -35,7 +35,11 @@ async function createAndRunClient(config: ClientConfig): Promise<{ id: string; r
     version: '1.0.0'
   });
 
-  const transport = new StreamableHTTPClientTransport(new URL(serverUrl));
+  const transport = new StreamableHTTPClientTransport(new URL(serverUrl), {
+    requestInit: {
+      credentials: "include",   // ensures cookies/auth headers are sent
+    },
+  });
 
   // Set up client-specific error handler
   client.onerror = (error) => {
diff --git a/src/server/streamableHttp.ts b/src/server/streamableHttp.ts
index 3bf84e430..9c60fdcda 100644
--- a/src/server/streamableHttp.ts
+++ b/src/server/streamableHttp.ts
@@ -236,6 +236,7 @@ export class StreamableHTTPServerTransport implements Transport {
   private async handleGetRequest(req: IncomingMessage, res: ServerResponse): Promise<void> {
     // The client MUST include an Accept header, listing text/event-stream as a supported content type.
     const acceptHeader = req.headers.accept;
+    console.log('GET cookies:', req.headers.cookie);
     if (!acceptHeader?.includes("text/event-stream")) {
       res.writeHead(406).end(JSON.stringify({
         jsonrpc: "2.0",