diff --git a/scripts/dynu/fetch_dynu_dns.py b/scripts/dynu/fetch_dynu_dns.py
index 8621ec1..ba03e4a 100755
--- a/scripts/dynu/fetch_dynu_dns.py
+++ b/scripts/dynu/fetch_dynu_dns.py
@@ -190,7 +190,11 @@ def main() -> int:
 
     base_url = os.environ.get("DYNU_BASE_URL", DEFAULT_BASE_URL).strip().strip("'").strip('"')
 
-    domains = list_domains(base_url, api_key)
+    try:
+        domains = list_domains(base_url, api_key)
+    except RuntimeError as exc:
+        print(str(exc), file=sys.stderr)
+        return 1
     target = [d for d in domains if str(d.get("name", "")).strip(".").lower() == BASE_DOMAIN]
 
     if not target:
@@ -207,7 +211,11 @@ def main() -> int:
             print(f"Domain entry for {BASE_DOMAIN} is missing 'id'; cannot fetch records.", file=sys.stderr)
             return 4
 
-        records = list_records(base_url, api_key, domain_id)
+        try:
+            records = list_records(base_url, api_key, domain_id)
+        except RuntimeError as exc:
+            print(str(exc), file=sys.stderr)
+            return 1
         normalized_domains.append(
             {
                 "name": str(d.get("name", BASE_DOMAIN)).strip().strip("."),