diff --git a/.gitignore b/.gitignore
index 97d69c0d..651e2cc7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -81,3 +81,4 @@ gradle-app.setting
 src/main/resources/meta/*/*.json
 *.log.*.gz
 *.salive
+test-diff
diff --git a/tools/diff.py b/tools/diff.py
new file mode 100644
index 00000000..aa0cfb2f
--- /dev/null
+++ b/tools/diff.py
@@ -0,0 +1,65 @@
+import re
+from pathlib import Path
+
+import requests
+
+token = "fill this in"
+urls = {
+    "prod": f"http://aquadx.hydev.org/gs/{token}/chu3/2.27",
+    "staging": f"http://staging.aquadx.net/gs/{token}/chu3/2.27"
+}
+
+def decode_to_dict(s: str) -> dict:
+    # Remove the surrounding braces
+    s = s.strip('{}')
+    # Use regex to match key-value pairs
+    pairs = re.findall(r'(\w+)=([^,]+)', s)
+    # Convert the list of tuples into a dictionary
+    decoded_dict = {}
+    for key, value in pairs:
+        if key == 'version':
+            continue
+        decoded_dict[key] = value
+        # # Try to convert numeric values to int or float
+        # if value.isdigit():
+        #     decoded_dict[key] = int(value)
+        # else:
+        #     try:
+        #         decoded_dict[key] = float(value)
+        #     except ValueError:
+        #         decoded_dict[key] = value  # Keep it as a string if not a number
+    return decoded_dict
+
+
+def save_resp(i, idx, api, data):
+    url = urls[idx]
+    resp = requests.post(f"{url}/{api}", json=data)
+    txt = f"""
+Request: {api}
+{data}
+
+Response: {resp.status_code}
+{resp.text}
+"""
+    print(txt)
+    Path(f"test-diff/{idx}").mkdir(exist_ok=True, parents=True)
+    Path(f"test-diff/{idx}/{i}-{api}.json").write_text(txt)
+
+
+if __name__ == '__main__':
+    # Read chusan.log
+    d = Path("chusan.log").read_text('utf-8').splitlines()
+    d = [l.split("|", 1)[1] for l in d if '|' in l]
+    d = [l.split(": ", 1)[1] for l in d if ': ' in l]
+    d = [l for l in d if l.startswith("Chu3 <")]
+    d = [l.split("< ", 1)[1] for l in d]
+    d = [l.split(" : ") for l in d if l.count("{") == 1]  # (api, data)
+    d = [(api, decode_to_dict(data)) for api, data in d]
+
+    print(d)
+
+    for i, (a, dt) in enumerate(d):
+        save_resp(i, "prod", a, dt)
+        save_resp(i, "staging", a, dt)
+
+