diff --git a/examples/1-basic-usage.js b/examples/1-basic-usage.js
index 6a6759d..def48a8 100644
--- a/examples/1-basic-usage.js
+++ b/examples/1-basic-usage.js
@@ -38,7 +38,8 @@ async function main() {
       })
     });
 
-    const data = await response.json();
+    if (!response.ok) throw new Error("Request failed");
+const data = await response.json();
     console.log("✅ Response:", data.choices[0].message.content);
 
     // Check budget status
diff --git a/examples/2-multiple-providers.js b/examples/2-multiple-providers.js
index 5f63162..cc11716 100644
--- a/examples/2-multiple-providers.js
+++ b/examples/2-multiple-providers.js
@@ -32,7 +32,8 @@ async function callOpenAI() {
     })
   });
 
-  const data = await response.json();
+  if (!response.ok) throw new Error("Request failed");
+const data = await response.json();
   console.log("   Response:", data.choices[0].message.content);
 }
 
@@ -53,7 +54,8 @@ async function callAnthropic() {
     })
   });
 
-  const data = await response.json();
+  if (!response.ok) throw new Error("Request failed");
+const data = await response.json();
   console.log("   Response:", data.content[0].text);
 }
 
@@ -71,7 +73,8 @@ async function callGemini() {
     }
   );
 
-  const data = await response.json();
+  if (!response.ok) throw new Error("Request failed");
+const data = await response.json();
   console.log("   Response:", data.candidates[0].content.parts[0].text);
 }
 
@@ -90,7 +93,8 @@ async function callGrok() {
     })
   });
 
-  const data = await response.json();
+  if (!response.ok) throw new Error("Request failed");
+const data = await response.json();
   console.log("   Response:", data.choices[0].message.content);
 }
 
diff --git a/examples/8-cross-provider-fallback.js b/examples/8-cross-provider-fallback.js
index fa5a451..9afa3da 100644
--- a/examples/8-cross-provider-fallback.js
+++ b/examples/8-cross-provider-fallback.js
@@ -68,7 +68,8 @@ async function main() {
       }),
     });
 
-    const data = await response.json();
+    if (!response.ok) throw new Error("Request failed");
+const data = await response.json();
     console.log("\nResponse:", data.choices?.[0]?.message?.content);
 
     // Budget is tracked across all providers