diff --git a/relay/relay.py b/relay/relay.py
index b2d212b..71c01b5 100644
--- a/relay/relay.py
+++ b/relay/relay.py
@@ -1,5 +1,5 @@
 
-import os, json, httpx
+import os, json, httpx, traceback
 from fastapi import FastAPI, HTTPException
 from pydantic import BaseModel
 
@@ -7,7 +7,6 @@ AGENT_URL = os.getenv("AGENT_URL", "http://ai-agent:8080")
 OPENAI_MODEL = os.getenv("OPENAI_MODEL", "gpt-4o-mini")
 
 def _read_api_key():
-    # Prefer Docker secret if available
     path = os.getenv("OPENAI_API_KEY_FILE", "/run/secrets/openai_api_key")
     if os.path.exists(path):
         return open(path, "r").read().strip()
@@ -26,9 +25,16 @@ class ChatIn(BaseModel):
 
 app = FastAPI(title="AI Relay (LLM -> Agent)")
 
+_last_debug = {"openai_request": None, "openai_response": None, "agent_request": None, "agent_response": None, "error": None}
+
 @app.get("/health")
 def health():
-    return {"ok": True}
+    return {"ok": True, "model": OPENAI_MODEL, "agent_url": AGENT_URL}
+
+@app.get("/last-raw")
+def last_raw():
+    # Expose last request/response for debugging
+    return _last_debug
 
 @app.post("/chat")
 async def chat(inp: ChatIn):
@@ -48,21 +54,42 @@ async def chat(inp: ChatIn):
         ],
     }
 
-    async with httpx.AsyncClient(timeout=30) as client:
-        r = await client.post(url, headers=headers, json=body)
-        if r.status_code >= 400:
-            raise HTTPException(502, f"OpenAI error: {r.text}")
-        data = r.json()
+    _last_debug["openai_request"] = {"url": url, "body": body}
+    _last_debug["openai_response"] = None
+    _last_debug["agent_request"] = None
+    _last_debug["agent_response"] = None
+    _last_debug["error"] = None
+
+    try:
+        async with httpx.AsyncClient(timeout=30) as client:
+            r = await client.post(url, headers=headers, json=body)
+            _last_debug["openai_response"] = {"status": r.status_code, "text": r.text[:500]}
+            r.raise_for_status()
+            data = r.json()
+    except httpx.RequestError as e:
+        _last_debug["error"] = f"OpenAI network error: {str(e)}"
+        raise HTTPException(502, f"OpenAI network error: {e}")
+    except httpx.HTTPStatusError as e:
+        _last_debug["error"] = f"OpenAI HTTP error: {e.response.text}"
+        raise HTTPException(502, f"OpenAI error: {e.response.text}")
 
     try:
         content = data["choices"][0]["message"]["content"]
         cmd = json.loads(content)
     except Exception as e:
+        _last_debug["error"] = f"Parse error: {str(e)}; raw={str(data)[:300]}"
         raise HTTPException(500, f"Failed to parse model JSON: {e}; raw={str(data)[:300]}")
 
-    # Forward to the agent
-    async with httpx.AsyncClient(timeout=15) as client:
-        r = await client.post(f"{AGENT_URL}/command", json=cmd)
-        if r.status_code >= 400:
-            raise HTTPException(r.status_code, f"Agent error: {r.text}")
-        return r.json()
+    _last_debug["agent_request"] = {"url": f"{AGENT_URL}/command", "json": cmd}
+    try:
+        async with httpx.AsyncClient(timeout=15) as client:
+            r = await client.post(f"{AGENT_URL}/command", json=cmd)
+            _last_debug["agent_response"] = {"status": r.status_code, "text": r.text[:500]}
+            r.raise_for_status()
+            return r.json()
+    except httpx.RequestError as e:
+        _last_debug["error"] = f"Agent network error: {str(e)}"
+        raise HTTPException(502, f"Agent network error: {e}")
+    except httpx.HTTPStatusError as e:
+        _last_debug["error"] = f"Agent HTTP error: {e.response.text}"
+        raise HTTPException(e.response.status_code, f"Agent error: {e.response.text}")