diff --git a/scripts/capture-g7-runtime-evidence.py b/scripts/capture-g7-runtime-evidence.py
index c6c4ac5..3e0a833 100644
--- a/scripts/capture-g7-runtime-evidence.py
+++ b/scripts/capture-g7-runtime-evidence.py
@@ -27,6 +27,10 @@ SNAPSHOT_SCHEMA_VERSION = "vignette.voice-runtime.v1"
 MAX_SAMPLES = 7_200
 MAX_INTERVAL_SECONDS = 60.0
 MAX_CAPTURE_WINDOW_SECONDS = 7_200.0
+_BROWSER_UA = (
+    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
+    "(KHTML, like Gecko) Chrome/140.0 Safari/537.36"
+)
 
 
 class EvidenceFailure(RuntimeError):
@@ -158,6 +162,9 @@ def fetch_snapshot(
         headers={
             "Accept": "application/json",
             "Cookie": f"{cookie_name}={cookie_value}",
+            # Cloudflare는 Python urllib 기본 User-Agent를 공개 API 도달 전에
+            # 거부한다. 공개 배포 probe와 같은 브라우저 호환 전송 경계를 쓴다.
+            "User-Agent": _BROWSER_UA,
         },
         method="GET",
     )
diff --git a/scripts/test_g7_runtime_evidence.py b/scripts/test_g7_runtime_evidence.py
index 7740244..08e68da 100644
--- a/scripts/test_g7_runtime_evidence.py
+++ b/scripts/test_g7_runtime_evidence.py
@@ -4,9 +4,11 @@ from __future__ import annotations
 
 import copy
 import importlib.util
+import json
 import sys
 import unittest
 from pathlib import Path
+from unittest import mock
 
 
 RUNNER_PATH = Path(__file__).with_name("capture-g7-runtime-evidence.py")
@@ -103,6 +105,42 @@ class G7RuntimeEvidenceTests(unittest.TestCase):
         self.assertNotIn("secret", serialized)
         self.assertFalse(evidence["cookie_value_logged"])
 
+    def test_public_fetch_uses_browser_compatible_user_agent(self) -> None:
+        captured_request = None
+
+        class Response:
+            status = 200
+
+            def __enter__(self):
+                return self
+
+            def __exit__(self, *_args):
+                return False
+
+            def read(self, _limit):
+                return json.dumps(snapshot()).encode("utf-8")
+
+        def urlopen(request, **_kwargs):
+            nonlocal captured_request
+            captured_request = request
+            return Response()
+
+        with mock.patch.object(self.runner.urllib.request, "urlopen", urlopen):
+            result = self.runner.fetch_snapshot(
+                url="https://api.example.test/admin/voice-runtime",
+                cookie_name="sid",
+                cookie_value="secret",
+                timeout_seconds=5.0,
+            )
+
+        self.assertEqual("vignette.voice-runtime.v1", result["schema_version"])
+        self.assertIsNotNone(captured_request)
+        headers = {
+            name.lower(): value for name, value in captured_request.header_items()
+        }
+        self.assertEqual(self.runner._BROWSER_UA, headers["user-agent"])
+        self.assertEqual("application/json", headers["accept"])
+
     def test_worker_drift_fails_closed(self) -> None:
         first = snapshot()
         second = copy.deepcopy(first)