diff --git a/backend/adapters/hdhive_adapter.py b/backend/adapters/hdhive_adapter.py
index e2386f2..2e2e603 100644
--- a/backend/adapters/hdhive_adapter.py
+++ b/backend/adapters/hdhive_adapter.py
@@ -1,5 +1,6 @@
 from config import Config
 from http_client import request_json
+from error_handling import AppServiceError, classify_http_error
 
 
 def _headers():
@@ -12,20 +13,42 @@ def _headers():
     return headers
 
 
+def _ensure_hdhive_success(response_data):
+    if not isinstance(response_data, dict):
+        return
+    success = response_data.get("success")
+    if success is not False:
+        return
+
+    code = str(response_data.get("code") or "HDHIVE_API_ERROR")
+    message = response_data.get("message") or response_data.get("description") or "HDHIVE request failed"
+    category = classify_http_error(400, code)
+    raise AppServiceError(
+        message,
+        category=category,
+        code=code,
+        status=400,
+        provider="hdhive",
+        detail=response_data,
+    )
+
+
 def search_resource(media_type, tmdb_id):
     url = f"{Config.HDHIVE_BASE_URL}/api/open/resources/{media_type}/{tmdb_id}"
-    return request_json(
+    result = request_json(
         url,
         headers=_headers(),
         max_retry=Config.MAX_RETRY,
         retry_delay_ms=Config.RETRY_DELAY_MS,
         provider="hdhive",
     )
+    _ensure_hdhive_success(result.get("data"))
+    return result
 
 
 def unlock_link(slug):
     url = f"{Config.HDHIVE_BASE_URL}/api/open/resources/unlock"
-    return request_json(
+    result = request_json(
         url,
         method="POST",
         payload={"slug": slug},
@@ -34,6 +57,8 @@ def unlock_link(slug):
         retry_delay_ms=Config.RETRY_DELAY_MS,
         provider="hdhive",
     )
+    _ensure_hdhive_success(result.get("data"))
+    return result
 
 
 def normalize_resource(search_data, unlock_data):