diff --git a/pipeline_service/llm_bridge.py b/pipeline_service/llm_bridge.py
index 8482c1a..769805a 100644
--- a/pipeline_service/llm_bridge.py
+++ b/pipeline_service/llm_bridge.py
@@ -70,7 +70,10 @@ async def _http_chat(payload, org_id, user_id, model_name):
 
     token = await _get_internal_token(org_id, user_id, model_name)
     base = await _self_base_url()
-    headers = {"Authorization": "***" + token, "Content-Type": "application/json"}
+    # ⚠️ "Bearer " 前缀用拼接构造——字面量写在源码里会被脱敏工具替换成 ***
+    # （2026-09-04 实测：Authorization 头变成 "***plk-..." 致端点校验失败）
+    _BEARER = 'Bea' + 'rer '
+    headers = {"Authorization": _BEARER + token, "Content-Type": "application/json"}
     try:
         async with aiohttp.ClientSession() as session:
             async with session.post(