diff --git a/examples/ai-agent/src/backend/server.ts b/examples/ai-agent/src/backend/server.ts
index f20eefd70..56b5a5272 100644
--- a/examples/ai-agent/src/backend/server.ts
+++ b/examples/ai-agent/src/backend/server.ts
@@ -2,6 +2,7 @@ import { registry } from "./registry";
 
 registry.start({
 	cors: {
-		origin: "http://localhost:5173",
+		origin: "http://localhost:3000",
+		credentials: true,
 	},
 });
diff --git a/examples/better-auth-external-db/src/backend/server.ts b/examples/better-auth-external-db/src/backend/server.ts
index 637a609a7..aa2319d9b 100644
--- a/examples/better-auth-external-db/src/backend/server.ts
+++ b/examples/better-auth-external-db/src/backend/server.ts
@@ -6,7 +6,12 @@ import { auth } from "./auth";
 import { registry } from "./registry";
 
 // Start RivetKit
-registry.start();
+registry.start({
+	cors: {
+		origin: "http://localhost:5173",
+		credentials: true,
+	},
+});
 
 // Setup router
 const app = new Hono();
diff --git a/examples/crdt/src/backend/server.ts b/examples/crdt/src/backend/server.ts
index f20eefd70..56b5a5272 100644
--- a/examples/crdt/src/backend/server.ts
+++ b/examples/crdt/src/backend/server.ts
@@ -2,6 +2,7 @@ import { registry } from "./registry";
 
 registry.start({
 	cors: {
-		origin: "http://localhost:5173",
+		origin: "http://localhost:3000",
+		credentials: true,
 	},
 });
diff --git a/examples/database/src/backend/server.ts b/examples/database/src/backend/server.ts
index f20eefd70..56b5a5272 100644
--- a/examples/database/src/backend/server.ts
+++ b/examples/database/src/backend/server.ts
@@ -2,6 +2,7 @@ import { registry } from "./registry";
 
 registry.start({
 	cors: {
-		origin: "http://localhost:5173",
+		origin: "http://localhost:3000",
+		credentials: true,
 	},
 });
diff --git a/examples/game/src/backend/server.ts b/examples/game/src/backend/server.ts
index f20eefd70..56b5a5272 100644
--- a/examples/game/src/backend/server.ts
+++ b/examples/game/src/backend/server.ts
@@ -2,6 +2,7 @@ import { registry } from "./registry";
 
 registry.start({
 	cors: {
-		origin: "http://localhost:5173",
+		origin: "http://localhost:3000",
+		credentials: true,
 	},
 });
diff --git a/examples/hono-bun/src/backend/server.ts b/examples/hono-bun/src/backend/server.ts
index 77cc48b7e..b2d846ba4 100644
--- a/examples/hono-bun/src/backend/server.ts
+++ b/examples/hono-bun/src/backend/server.ts
@@ -13,6 +13,7 @@ const { client, fetch } = registry.start({
 	getUpgradeWebSocket: () => upgradeWebSocket,
 	cors: {
 		origin: "http://localhost:5173",
+		credentials: true,
 	},
 });
 
diff --git a/examples/hono-react/src/backend/server.ts b/examples/hono-react/src/backend/server.ts
index 58006b776..4c5f80de1 100644
--- a/examples/hono-react/src/backend/server.ts
+++ b/examples/hono-react/src/backend/server.ts
@@ -5,6 +5,7 @@ import { registry } from "./registry";
 const { client } = registry.start({
 	cors: {
 		origin: "http://localhost:5173",
+		credentials: true,
 	},
 });
 
diff --git a/examples/rate/src/backend/server.ts b/examples/rate/src/backend/server.ts
index f20eefd70..56b5a5272 100644
--- a/examples/rate/src/backend/server.ts
+++ b/examples/rate/src/backend/server.ts
@@ -2,6 +2,7 @@ import { registry } from "./registry";
 
 registry.start({
 	cors: {
-		origin: "http://localhost:5173",
+		origin: "http://localhost:3000",
+		credentials: true,
 	},
 });
diff --git a/examples/raw-fetch-handler/src/backend/server.ts b/examples/raw-fetch-handler/src/backend/server.ts
index a70c8e887..394945681 100644
--- a/examples/raw-fetch-handler/src/backend/server.ts
+++ b/examples/raw-fetch-handler/src/backend/server.ts
@@ -4,7 +4,12 @@ import { cors } from "hono/cors";
 import { registry } from "./registry";
 
 // Start RivetKit
-const { client } = registry.start();
+const { client } = registry.start({
+	cors: {
+		origin: "http://localhost:5173",
+		credentials: true,
+	},
+});
 
 // Setup router
 const app = new Hono();
@@ -12,6 +17,7 @@ const app = new Hono();
 app.use(
 	cors({
 		origin: "http://localhost:5173",
+		credentials: true,
 	}),
 );
 
diff --git a/examples/raw-websocket-handler-proxy/src/backend/server.ts b/examples/raw-websocket-handler-proxy/src/backend/server.ts
index 9b386ce5c..a8eb71f97 100644
--- a/examples/raw-websocket-handler-proxy/src/backend/server.ts
+++ b/examples/raw-websocket-handler-proxy/src/backend/server.ts
@@ -3,7 +3,12 @@ import { createNodeWebSocket } from "@hono/node-ws";
 import { Hono } from "hono";
 import { registry } from "./registry.js";
 
-const { client } = registry.start();
+const { client } = registry.start({
+	cors: {
+		origin: "http://localhost:5173",
+		credentials: true,
+	},
+});
 
 const app = new Hono();
 const { injectWebSocket, upgradeWebSocket } = createNodeWebSocket({ app });
diff --git a/examples/react/src/backend/server.ts b/examples/react/src/backend/server.ts
index f20eefd70..b51ac47fe 100644
--- a/examples/react/src/backend/server.ts
+++ b/examples/react/src/backend/server.ts
@@ -3,5 +3,6 @@ import { registry } from "./registry";
 registry.start({
 	cors: {
 		origin: "http://localhost:5173",
+		credentials: true,
 	},
 });
diff --git a/examples/stream/src/backend/server.ts b/examples/stream/src/backend/server.ts
index f20eefd70..56b5a5272 100644
--- a/examples/stream/src/backend/server.ts
+++ b/examples/stream/src/backend/server.ts
@@ -2,6 +2,7 @@ import { registry } from "./registry";
 
 registry.start({
 	cors: {
-		origin: "http://localhost:5173",
+		origin: "http://localhost:3000",
+		credentials: true,
 	},
 });
diff --git a/examples/sync/src/backend/server.ts b/examples/sync/src/backend/server.ts
index f20eefd70..56b5a5272 100644
--- a/examples/sync/src/backend/server.ts
+++ b/examples/sync/src/backend/server.ts
@@ -2,6 +2,7 @@ import { registry } from "./registry";
 
 registry.start({
 	cors: {
-		origin: "http://localhost:5173",
+		origin: "http://localhost:3000",
+		credentials: true,
 	},
 });
diff --git a/examples/tenant/src/backend/server.ts b/examples/tenant/src/backend/server.ts
index f20eefd70..56b5a5272 100644
--- a/examples/tenant/src/backend/server.ts
+++ b/examples/tenant/src/backend/server.ts
@@ -2,6 +2,7 @@ import { registry } from "./registry";
 
 registry.start({
 	cors: {
-		origin: "http://localhost:5173",
+		origin: "http://localhost:3000",
+		credentials: true,
 	},
 });