diff --git a/src/agents/factchecker.py b/src/agents/factchecker.py
index bda5fb5..804f094 100644
--- a/src/agents/factchecker.py
+++ b/src/agents/factchecker.py
@@ -381,12 +381,27 @@ class FactCheckerAgent:
             logger.error(f"Inkrementeller Faktencheck-Fehler: {e}")
             return [], None
 
+    def _validate_facts(self, facts: list[dict]) -> list[dict]:
+        """Validiert Fakten: confirmed/established ohne URL wird herabgestuft."""
+        url_pattern = re.compile(r'https?://')
+        for fact in facts:
+            status = fact.get("status", "")
+            evidence = fact.get("evidence") or ""
+            if status in ("confirmed", "established") and not url_pattern.search(evidence):
+                old_status = status
+                fact["status"] = "unconfirmed" if status == "confirmed" else "unverified"
+                logger.warning(
+                    f"Fakt herabgestuft ({old_status} -> {fact['status']}): "
+                    f"keine URL in Evidenz: '{fact.get('claim', '')[:60]}...'"
+                )
+        return facts
+
     def _parse_response(self, response: str) -> list[dict]:
         """Parst die Claude-Antwort als JSON-Array."""
         try:
             data = json.loads(response)
             if isinstance(data, list):
-                return data
+                return self._validate_facts(data)
         except json.JSONDecodeError:
             pass
 
@@ -395,7 +410,7 @@ class FactCheckerAgent:
             try:
                 data = json.loads(match.group())
                 if isinstance(data, list):
-                    return data
+                    return self._validate_facts(data)
             except json.JSONDecodeError:
                 pass