docs(infra): record local n8n agent service

TOOLS.md

@@ -115,6 +115,21 @@ Skills are shared. Your setup is yours. Keeping them apart means you can update
   - Native Brave Search API (`web_search`) configured on 2026-03-10.
   - Plan/rate note: Brave free plan hit `rate_limit: 1`; serialize requests instead of parallel bursts.
 
+- **n8n-agent**
+  - Image: `docker.n8n.io/n8nio/n8n:latest`
+  - Container: `n8n-agent`
+  - Port: `18808 -> 5678`
+  - Health: healthy when last verified by host runtime output on 2026-03-11
+  - URL(s):
+    - `http://192.168.153.113:18808`
+    - `http://192.168.153.117:18808`
+    - `http://100.123.88.127:18808`
+  - Role: dedicated local n8n instance for agent-oriented workflows on the LAN
+  - Notes:
+    - initial host-port attempt on `18806` conflicted with another host listener; service was moved to `18808`
+    - webhook path `openclaw-ping` was created and tested end-to-end
+    - prefer narrow webhook-based integration before giving broad n8n admin/API control
+
 ### Embeddings (local)
 
 - Runtime: Ollama

memory/2026-03-12.md

@@ -0,0 +1,10 @@
+# 2026-03-12
+
+## n8n local documentation fix
+- Documented the local `n8n-agent` service in `TOOLS.md` after noticing it had been set up but not captured in workspace notes.
+- Recorded current known service details from prior host/runtime evidence:
+  - port `18808 -> 5678`
+  - LAN/Tailscale URLs
+  - dedicated agent-oriented n8n instance
+  - `openclaw-ping` webhook path tested end-to-end
+- Operating note: prefer narrow webhook-first integration rather than broad n8n admin/API access.