diff --git a/python_tools/src/python_tools/get_ncatchments_vpu.py b/python_tools/src/python_tools/get_ncatchments_vpu.py
new file mode 100644
index 00000000..f0d6b801
--- /dev/null
+++ b/python_tools/src/python_tools/get_ncatchments_vpu.py
@@ -0,0 +1,39 @@
+import boto3
+import json
+
+# Initialize S3 client
+s3_client = boto3.client('s3')
+
+def count_key_value_pairs(json_data):
+    try:
+        data = json.loads(json_data)
+        if isinstance(data, dict):
+            return len(data)  # Return the number of key-value pairs
+        else:
+            return 0
+    except json.JSONDecodeError:
+        return 0
+
+def process_s3_files(bucket_name, prefix):
+    # List objects in the bucket with the given prefix
+    response = s3_client.list_objects_v2(Bucket=bucket_name, Prefix=prefix)
+
+    if 'Contents' not in response:
+        print(f"No files found with prefix '{prefix}' in bucket '{bucket_name}'.")
+        return
+
+    for obj in response['Contents']:
+        file_key = obj['Key']
+        
+        # Download file content
+        file_obj = s3_client.get_object(Bucket=bucket_name, Key=file_key)
+        file_content = file_obj['Body'].read().decode('utf-8')
+
+        # Count the key-value pairs in the JSON file
+        num_pairs = count_key_value_pairs(file_content)
+        print(f"File: {file_key}, Key-Value Pairs: {num_pairs}")
+
+# Example usage
+bucket_name = 'datastream-resources'
+prefix = 'weights'
+process_s3_files(bucket_name, prefix)