diff --git a/apps/api/src/main.py b/apps/api/src/main.py
index 8bcc64e4..764323f7 100644
--- a/apps/api/src/main.py
+++ b/apps/api/src/main.py
@@ -158,6 +158,11 @@ if SENTRY_DSN:
         # Phase 15.3: Deep Linking hook
         before_send=_sentry_before_send,
     )
+    # 2026-04-05 Claude Code: 加入統一標籤，對齊 Prometheus/auto_repair layer 規範
+    sentry_sdk.set_tag("layer", "k8s")
+    sentry_sdk.set_tag("component", "api")
+    sentry_sdk.set_tag("host", "k8s-awoooi-prod")
+    sentry_sdk.set_tag("team", "backend")
     logger.info("sentry_initialized", dsn=SENTRY_DSN.split("@")[-1])
 else:
     logger.info("sentry_disabled", reason="SENTRY_DSN not configured")