diff --git a/scripts/health_check_mindnet.py b/scripts/health_check_mindnet.py
new file mode 100644
index 0000000..be7d9dd
--- /dev/null
+++ b/scripts/health_check_mindnet.py
@@ -0,0 +1,280 @@
+#!/usr/bin/env python3
+"""
+scripts/health_check_mindnet.py
+
+Ein einfacher Health-Check für den mindnet-Retriever/Query-Endpoint.
+Kann z. B. über Cron, systemd oder n8n (SSH / Command-Node) ausgeführt werden.
+
+Funktion:
+- POST auf /query in den Modi "semantic" und "hybrid"
+- prüft HTTP-Status, JSON-Struktur, Anzahl Treffer
+- gibt eine kompakte JSON-Ausgabe zurück
+- Exit-Code 0 = OK, 1 = Fehler
+
+Beispiel:
+
+    python scripts/health_check_mindnet.py \
+        --url http://127.0.0.1:8001/query \
+        --query "embeddings" \
+        --top-k 3
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import sys
+import time
+import urllib.error
+import urllib.request
+from typing import Any, Dict, List
+
+
+def _post_query(
+    url: str,
+    mode: str,
+    query: str,
+    top_k: int,
+    timeout: float,
+) -> Dict[str, Any]:
+    """
+    Führt einen POST auf den /query-Endpoint aus und gibt das decodierte JSON zurück.
+
+    Raises:
+        urllib.error.URLError, urllib.error.HTTPError, json.JSONDecodeError
+    """
+    payload = {
+        "mode": mode,
+        "query": query,
+        "top_k": top_k,
+        # Minimal-Expand, damit der Hybridmodus nichts "Exotisches" braucht.
+        "expand": {
+            "depth": 1 if mode == "hybrid" else 0,
+            "edge_types": ["references", "belongs_to", "prev", "next"],
+        },
+        "ret": {
+            "with_paths": True,
+            "with_notes": True,
+            "with_chunks": True,
+        },
+    }
+
+    data = json.dumps(payload).encode("utf-8")
+    req = urllib.request.Request(
+        url=url,
+        data=data,
+        headers={"Content-Type": "application/json"},
+        method="POST",
+    )
+
+    start = time.monotonic()
+    with urllib.request.urlopen(req, timeout=timeout) as resp:
+        status_code = resp.getcode()
+        body = resp.read().decode("utf-8")
+    end = time.monotonic()
+
+    latency_ms = int((end - start) * 1000)
+
+    if status_code != 200:
+        raise RuntimeError(f"HTTP {status_code}: {body}")
+
+    try:
+        doc = json.loads(body)
+    except json.JSONDecodeError as exc:
+        raise RuntimeError(f"Antwort ist kein gültiges JSON: {exc}") from exc
+
+    if not isinstance(doc, dict):
+        raise RuntimeError("Antwort ist kein JSON-Objekt")
+
+    doc["_latency_ms"] = latency_ms
+    return doc
+
+
+def _validate_response(
+    mode: str,
+    doc: Dict[str, Any],
+    min_results: int,
+) -> Dict[str, Any]:
+    """
+    Prüft die wichtigsten Invarianten des Query-Responses.
+
+    Gibt ein Result-Dict zurück mit:
+    - status: "ok" oder "error"
+    - message: str
+    - latency_ms: int
+    - used_mode: str
+    - result_count: int
+    """
+    latency_ms = int(doc.get("_latency_ms", -1))
+    used_mode = str(doc.get("used_mode", "unknown"))
+    results = doc.get("results", [])
+
+    if not isinstance(results, list):
+        return {
+            "status": "error",
+            "message": "results ist kein Array",
+            "latency_ms": latency_ms,
+            "used_mode": used_mode,
+            "result_count": -1,
+        }
+
+    result_count = len(results)
+
+    if result_count < min_results:
+        return {
+            "status": "error",
+            "message": f"zu wenige Ergebnisse: {result_count} < {min_results}",
+            "latency_ms": latency_ms,
+            "used_mode": used_mode,
+            "result_count": result_count,
+        }
+
+    # Optional: ein paar Felder im ersten Hit prüfen
+    sample_msg = "OK"
+    if result_count > 0:
+        first = results[0]
+        if not isinstance(first, dict):
+            sample_msg = "first result ist kein Objekt"
+        else:
+            # einfache Plausibilitätschecks
+            _ = first.get("note_id")
+            _ = first.get("chunk_id")
+            _ = first.get("total_score")
+
+    status = "ok" if sample_msg == "OK" else "error"
+    return {
+        "status": status,
+        "message": sample_msg,
+        "latency_ms": latency_ms,
+        "used_mode": used_mode,
+        "result_count": result_count,
+    }
+
+
+def run_health_check(
+    url: str,
+    query: str,
+    top_k: int,
+    timeout: float,
+    modes: List[str],
+    min_results: int,
+) -> Dict[str, Any]:
+    """
+    Führt den Health-Check für die angegebenen Modi aus.
+    """
+    report: Dict[str, Any] = {
+        "url": url,
+        "query": query,
+        "top_k": top_k,
+        "timeout_s": timeout,
+        "checks": [],
+        "overall_status": "ok",
+    }
+
+    for mode in modes:
+        entry: Dict[str, Any] = {
+            "mode": mode,
+            "status": "error",
+            "message": "",
+        }
+        try:
+            doc = _post_query(url=url, mode=mode, query=query, top_k=top_k, timeout=timeout)
+            validation = _validate_response(mode=mode, doc=doc, min_results=min_results)
+            entry.update(validation)
+        except (urllib.error.URLError, urllib.error.HTTPError) as exc:
+            entry["status"] = "error"
+            entry["message"] = f"HTTP/Netzwerkfehler: {exc}"
+            entry["latency_ms"] = -1
+            entry["used_mode"] = mode
+            entry["result_count"] = -1
+        except Exception as exc:  # noqa: BLE001
+            entry["status"] = "error"
+            entry["message"] = f"unerwarteter Fehler: {exc}"
+            entry["latency_ms"] = -1
+            entry["used_mode"] = mode
+            entry["result_count"] = -1
+
+        report["checks"].append(entry)
+
+    # Overall-Status bestimmen
+    for c in report["checks"]:
+        if c.get("status") != "ok":
+            report["overall_status"] = "error"
+            break
+
+    return report
+
+
+def parse_args(argv: List[str]) -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description="Health-Check für mindnet /query-Retriever",
+    )
+    parser.add_argument(
+        "--url",
+        default="http://127.0.0.1:8001/query",
+        help="Vollständige URL des /query-Endpunkts (Default: %(default)s)",
+    )
+    parser.add_argument(
+        "--query",
+        default="embeddings",
+        help="Test-Query für den Health-Check (Default: %(default)s)",
+    )
+    parser.add_argument(
+        "--top-k",
+        type=int,
+        default=3,
+        help="Top-K für die Testabfrage (Default: %(default)s)",
+    )
+    parser.add_argument(
+        "--timeout",
+        type=float,
+        default=5.0,
+        help="Timeout in Sekunden pro Request (Default: %(default)s)",
+    )
+    parser.add_argument(
+        "--modes",
+        nargs="+",
+        default=["semantic", "hybrid"],
+        help="Zu prüfende Modi (Default: semantic hybrid)",
+    )
+    parser.add_argument(
+        "--min-results",
+        type=int,
+        default=1,
+        help="Minimale Anzahl erwarteter Ergebnisse (Default: %(default)s)",
+    )
+    return parser.parse_args(argv)
+
+
+def main(argv: List[str]) -> int:
+    args = parse_args(argv)
+
+    report = run_health_check(
+        url=args.url,
+        query=args.query,
+        top_k=args.top_k,
+        timeout=args.timeout,
+        modes=args.modes,
+        min_results=args.min_results,
+    )
+
+    overall = report.get("overall_status", "error")
+
+    # Kurze menschenlesbare Zusammenfassung:
+    print(f"mindnet health: {overall}")
+    for c in report["checks"]:
+        mode = c.get("mode")
+        status = c.get("status")
+        latency = c.get("latency_ms")
+        result_count = c.get("result_count")
+        msg = c.get("message", "")
+        print(f"  - {mode}: {status} (latency={latency} ms, results={result_count}) {msg}")
+
+    # JSON-Ausgabe für n8n / Maschinen:
+    print(json.dumps(report, ensure_ascii=False))
+
+    return 0 if overall == "ok" else 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main(sys.argv[1:]))