diff --git a/src/app/api/predict/route.ts b/src/app/api/predict/route.ts
index b66be5b..0c72985 100644
--- a/src/app/api/predict/route.ts
+++ b/src/app/api/predict/route.ts
@@ -14,8 +14,8 @@ const CandleSchema = z.object({
 });
 
 const PredictRequestSchema = z.object({
-  pair: z.string().min(1),
-  timeframe: z.string().min(1),
+  pair: z.string().min(1).optional(),
+  timeframe: z.string().min(1).optional(),
   candles: z.array(CandleSchema),
 });
 
diff --git a/src/app/page.tsx b/src/app/page.tsx
index cf74aa8..c3c9370 100644
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -551,7 +551,14 @@ export default function Home() {
       });
 
       if (!response.ok) {
-        throw new Error(`Prediction failed: ${response.statusText}`);
+        let message = response.statusText || 'Prediction failed';
+        try {
+          const errorBody = await response.json();
+          message = errorBody?.error || errorBody?.detail || message;
+        } catch {
+          // ignore parse errors
+        }
+        throw new Error(`Prediction failed: ${message}`);
       }
 
       const data = await response.json();
@@ -678,7 +685,14 @@ export default function Home() {
       });
 
       if (!response.ok) {
-        throw new Error(`Batch prediction failed: ${response.statusText}`);
+        let message = response.statusText || 'Batch prediction failed';
+        try {
+          const errorBody = await response.json();
+          message = errorBody?.error || errorBody?.detail || message;
+        } catch {
+          // ignore parse errors
+        }
+        throw new Error(`Batch prediction failed: ${message}`);
       }
 
       const data = await response.json();