diff --git a/app/core/validate_note.py b/app/core/validate_note.py
new file mode 100644
index 0000000..1fa77a6
--- /dev/null
+++ b/app/core/validate_note.py
@@ -0,0 +1,16 @@
+from __future__ import annotations
+from typing import Dict
+from jsonschema import ValidationError
+from .schema_loader import get_validator
+
+NOTE_SCHEMA_NAME = "note.schema.json"
+
+def validate_note_payload(payload: Dict) -> None:
+    validator = get_validator(NOTE_SCHEMA_NAME)
+    errors = sorted(validator.iter_errors(payload), key=lambda e: e.path)
+    if errors:
+        msgs = []
+        for e in errors:
+            loc = ".".join([str(x) for x in e.path]) or "<root>"
+            msgs.append(f"{loc}: {e.message}")
+        raise ValidationError(" | ".join(msgs))