diff --git a/tools/lib/filereader.py b/tools/lib/filereader.py
index 70a5d3fe8c..02f5fd1b95 100644
--- a/tools/lib/filereader.py
+++ b/tools/lib/filereader.py
@@ -2,6 +2,7 @@ import os
 import posixpath
 import socket
 from functools import cache
+from openpilot.common.retry import retry
 from urllib.parse import urlparse
 
 from openpilot.tools.lib.url_file import URLFile
@@ -9,6 +10,8 @@ from openpilot.tools.lib.url_file import URLFile
 DATA_ENDPOINT = os.getenv("DATA_ENDPOINT", "http://data-raw.comma.internal/")
 
 
+@cache
+@retry(delay=0.0)
 def internal_source_available(url: str) -> bool:
   if os.path.isdir(url):
     return True