Fix agent0 connectivity test to use health + key check

Use GET /api/health (instant, no LLM call) for reachability and
POST /api/api_reset_chat to verify the API key is accepted.
Sending a real message blocks for the full LLM round-trip (>30s).

Also switch from MCP streamable-http to REST API (X-API-KEY header).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

test_connectivity.py

@@ -21,8 +21,8 @@ Configuration via environment variables (or a local .env file):
   LM_STUDIO_URL       — LM Studio base URL (default: http://localhost:1234)
   LM_STUDIO_MODEL     — model to use (default: first available)
   HERMES_URL          — Hermes dashboard URL (default: http://localhost:50007)
-  AGENT0_URL          — Agent Zero base URL
-  AGENT0_MCP_KEY      — Agent Zero MCP token
+  AGENT0_URL          — Agent Zero base URL (e.g. http://localhost:50003)
+  AGENT0_API_KEY      — Agent Zero X-API-KEY from the agent's dashboard
 
 Usage:
   python test_connectivity.py
@@ -287,27 +287,47 @@ async def test_hermes():
 # ── Agent Zero ────────────────────────────────────────────────────────────────
 
 async def test_agent0():
-    section("Agent Zero (MCP)")
+    section("Agent Zero (REST)")
     base_url = os.environ.get("AGENT0_URL", "")
-    mcp_key  = os.environ.get("AGENT0_MCP_KEY", "")
+    api_key  = os.environ.get("AGENT0_API_KEY", "")
 
-    if not base_url or not mcp_key:
-        skip("MCP endpoint", "AGENT0_URL and AGENT0_MCP_KEY not set")
+    if not base_url or not api_key:
+        skip("api_message endpoint", "AGENT0_URL and AGENT0_API_KEY not set")
         return
 
-    mcp_url = f"{base_url.rstrip('/')}/mcp/t-{mcp_key}/http"
+    url = f"{base_url.rstrip('/')}/api/api_message"
+
+    health_url = f"{base_url.rstrip('/')}/api/health"
 
     import httpx
     try:
+        # Step 1: health check (no auth needed, fast)
         async with httpx.AsyncClient(timeout=10.0) as client:
-            r = await client.get(mcp_url, headers={"Accept": "application/json"})
+            rh = await client.get(health_url)
 
-        if r.status_code in (200, 405):
-            ok("MCP endpoint reachable", f"HTTP {r.status_code} at {mcp_url}")
-        elif r.status_code == 401:
-            fail("Bad MCP key", f"HTTP {r.status_code}")
+        if rh.status_code != 200:
+            fail("Health endpoint", f"HTTP {rh.status_code}")
+            return
+
+        info = rh.json()
+        version = info.get("gitinfo", {}).get("version", "unknown")
+        ok(f"Reachable ({version})", health_url)
+
+        # Step 2: verify API key is accepted via api_reset_chat (fast, no LLM call)
+        reset_url = f"{base_url.rstrip('/')}/api/api_reset_chat"
+        async with httpx.AsyncClient(timeout=10.0) as client:
+            rk = await client.post(
+                reset_url,
+                headers={"X-API-KEY": api_key, "Content-Type": "application/json"},
+                json={},
+            )
+
+        if rk.status_code == 200:
+            ok("API key accepted", f"HTTP {rk.status_code}")
+        elif rk.status_code in (401, 403):
+            fail("Bad API key", f"HTTP {rk.status_code}")
         else:
-            ok("MCP endpoint reachable", f"HTTP {r.status_code}")
+            ok("API key accepted", f"HTTP {rk.status_code}")
 
     except httpx.ConnectError as e:
         fail("Not reachable", str(e)[:120])