diff --git a/src/proxmox_mcp/server.py b/src/proxmox_mcp/server.py
index 0477033..efcd9be 100644
--- a/src/proxmox_mcp/server.py
+++ b/src/proxmox_mcp/server.py
@@ -1,11 +1,15 @@
 from __future__ import annotations
 
 import json
+import os
+from typing import Any
 
+import httpx
 from mcp.server.fastmcp import FastMCP
 
 from proxmox_mcp import __version__
 from proxmox_mcp.config import settings
+from proxmox_mcp.targets import registry
 from proxmox_mcp.tools import register_all
 
 mcp = FastMCP(
@@ -18,6 +22,131 @@ mcp = FastMCP(
 )
 
 
+def _get_active_client() -> httpx.Client | None:
+    """Return an authenticated httpx client for the active target, or None."""
+    target = registry.active()
+    if not target:
+        return None
+    verify = os.environ.get("PROXMOX_VERIFY_SSL", "true").lower() in ("1", "true", "yes")
+    client = httpx.Client(
+        base_url=target.url,
+        verify=verify,
+        headers={"Authorization": f"PVEAPIToken={target.token_id}={target.token_secret}"},
+        timeout=30.0,
+    )
+    return client
+
+
+@mcp.tool()
+def proxmox_list_all_guests() -> str:
+    """List all QEMU VMs and LXC containers across all Proxmox cluster nodes.
+
+    This tool uses the cluster resources endpoint, which does not require a node
+    parameter.  It returns a combined list of all VMs and containers regardless
+    of which node they reside on.
+    """
+    client = _get_active_client()
+    if not client:
+        return json.dumps({"error": "No active target. Call proxmox_connect or proxmox_use_target first."})
+
+    try:
+        # Query cluster resources for both VMs and containers
+        resp = client.get("/api2/json/cluster/resources", params={"type": "vm"})
+        resp.raise_for_status()
+        data = resp.json().get("data", [])
+
+        # Filter: vmid with status and type
+        guests = []
+        for entry in data:
+            if entry.get("type") in ("qemu", "lxc"):
+                guests.append({
+                    "vmid": entry.get("vmid"),
+                    "node": entry.get("node"),
+                    "name": entry.get("name"),
+                    "type": entry.get("type"),
+                    "status": entry.get("status"),
+                    "mem": entry.get("mem"),
+                    "maxmem": entry.get("maxmem"),
+                    "cpu": entry.get("cpu"),
+                    "maxcpu": entry.get("maxcpu"),
+                    "disk": entry.get("disk"),
+                    "maxdisk": entry.get("maxdisk"),
+                    "uptime": entry.get("uptime"),
+                })
+        return json.dumps(guests, indent=2)
+    except Exception as exc:
+        return json.dumps({"error": str(exc)})
+    finally:
+        client.close()
+
+
+@mcp.tool()
+def proxmox_debug_guest_inventory(node: str | None = None) -> str:
+    """Return the raw JSON from the Proxmox API for debugging guest listing.
+
+    If a node is given, queries /nodes/{node}/qemu and /nodes/{node}/lxc separately.
+    Otherwise, queries the cluster resources endpoint.
+    """
+    client = _get_active_client()
+    if not client:
+        return json.dumps({"error": "No active target. Call proxmox_connect or proxmox_use_target first."})
+
+    try:
+        result = {}
+        if node:
+            # Per-node endpoints
+            for gtype in ("qemu", "lxc"):
+                resp = client.get(f"/api2/json/nodes/{node}/{gtype}")
+                resp.raise_for_status()
+                result[gtype] = resp.json().get("data", [])
+        else:
+            # Cluster resources
+            resp = client.get("/api2/json/cluster/resources", params={"type": "vm"})
+            resp.raise_for_status()
+            result = resp.json()
+        return json.dumps(result, indent=2, default=str)
+    except Exception as exc:
+        return json.dumps({"error": str(exc)})
+    finally:
+        client.close()
+
+
+@mcp.tool()
+def proxmox_list_qemu(node: str) -> str:
+    """List all QEMU VMs on a specific Proxmox node."""
+    client = _get_active_client()
+    if not client:
+        return json.dumps({"error": "No active target. Call proxmox_connect or proxmox_use_target first."})
+
+    try:
+        resp = client.get(f"/api2/json/nodes/{node}/qemu")
+        resp.raise_for_status()
+        vms = resp.json().get("data", [])
+        return json.dumps(vms, indent=2)
+    except Exception as exc:
+        return json.dumps({"error": str(exc)})
+    finally:
+        client.close()
+
+
+@mcp.tool()
+def proxmox_list_lxc(node: str) -> str:
+    """List all LXC containers on a specific Proxmox node."""
+    client = _get_active_client()
+    if not client:
+        return json.dumps({"error": "No active target. Call proxmox_connect or proxmox_use_target first."})
+
+    try:
+        resp = client.get(f"/api2/json/nodes/{node}/lxc")
+        resp.raise_for_status()
+        lxcs = resp.json().get("data", [])
+        return json.dumps(lxcs, indent=2)
+    except Exception as exc:
+        return json.dumps({"error": str(exc)})
+    finally:
+        client.close()
+
+
 @mcp.tool()
 def proxmox_get_config() -> str:
     from proxmox_mcp.targets import registry