diff --git a/sanity_check_tool/src/sanity_check_tool/cli.py b/sanity_check_tool/src/sanity_check_tool/cli.py
new file mode 100644
index 0000000..49f952b
--- /dev/null
+++ b/sanity_check_tool/src/sanity_check_tool/cli.py
@@ -0,0 +1,52 @@
+import argparse
+import json
+import sys
+from pathlib import Path
+
+from sanity_check_tool.core import perform_sanity_checks
+
+
+def main() -> None:
+    """Parse command-line arguments and run sanity checks on the provided run data JSON file."""
+    parser = argparse.ArgumentParser(
+        description="Run sanity checks for experimental run data."
+    )
+    parser.add_argument(
+        "--input",
+        required=True,
+        help="Pfad zur JSON-Datei mit Run-Daten."
+    )
+
+    args = parser.parse_args()
+
+    input_path = Path(args.input)
+    if not input_path.exists() or not input_path.is_file():
+        print(json.dumps({"error": f"Input file not found: {input_path}"}, indent=2), file=sys.stderr)
+        sys.exit(1)
+
+    try:
+        with input_path.open("r", encoding="utf-8") as fh:
+            run_data = json.load(fh)
+    except json.JSONDecodeError as e:
+        print(json.dumps({"error": f"Invalid JSON input: {e}"}, indent=2), file=sys.stderr)
+        sys.exit(1)
+
+    if not isinstance(run_data, dict):
+        print(json.dumps({"error": "Run data must be a JSON object."}, indent=2), file=sys.stderr)
+        sys.exit(1)
+
+    required_fields = {"runs", "sanity_checks"}
+    missing = required_fields - run_data.keys()
+    if missing:
+        print(json.dumps({"error": f"Missing required fields: {', '.join(missing)}"}, indent=2), file=sys.stderr)
+        sys.exit(1)
+
+    results = perform_sanity_checks(run_data)
+
+    # Output results as formatted JSON string
+    json.dump(results, sys.stdout, indent=2)
+    sys.stdout.write("\n")
+
+
+if __name__ == "__main__":
+    main()