diff --git a/src/transports/http/types.ts b/src/transports/http/types.ts
index b1db39d..ca49840 100644
--- a/src/transports/http/types.ts
+++ b/src/transports/http/types.ts
@@ -71,7 +71,7 @@ export interface HttpStreamTransportConfig {
 
   /**
    * Response mode: stream (Server-Sent Events) or batch (JSON)
-   * Defaults to 'stream'
+   * Defaults to 'batch'
    */
   responseMode?: ResponseMode;
 
@@ -119,7 +119,7 @@ export const DEFAULT_SESSION_CONFIG: SessionConfig = {
 export const DEFAULT_HTTP_STREAM_CONFIG: HttpStreamTransportConfig = {
   port: 8080,
   endpoint: '/mcp',
-  responseMode: 'stream',
+  responseMode: 'batch',
   batchTimeout: 30000,
   maxMessageSize: 4 * 1024 * 1024,
   session: DEFAULT_SESSION_CONFIG,
diff --git a/tests/transports/host-binding.test.ts b/tests/transports/host-binding.test.ts
index 56ed3e9..a38f9e1 100644
--- a/tests/transports/host-binding.test.ts
+++ b/tests/transports/host-binding.test.ts
@@ -80,5 +80,11 @@ describe('Host binding defaults', () => {
       expect(DEFAULT_HTTP_STREAM_CONFIG.port).toBe(8080);
       expect((DEFAULT_HTTP_STREAM_CONFIG as any).host).toBeUndefined();
     });
+
+    it('should default responseMode to "batch" in DEFAULT_HTTP_STREAM_CONFIG', () => {
+      // README and the type doc comment both document "batch" as the default
+      // response mode for the HTTP Stream transport; the runtime default must match.
+      expect(DEFAULT_HTTP_STREAM_CONFIG.responseMode).toBe('batch');
+    });
   });
 });