diff --git a/litellm/a2a_protocol/card_resolver.py b/litellm/a2a_protocol/card_resolver.py
index 5b837b654cd..d13c97c7bf4 100644
--- a/litellm/a2a_protocol/card_resolver.py
+++ b/litellm/a2a_protocol/card_resolver.py
@@ -5,9 +5,10 @@ Extends the A2A SDK's card resolver to support multiple well-known paths
 and fixes agent card URL issues where the card contains internal/localhost URLs.
 """
 
-from typing import TYPE_CHECKING, Any, Dict, List, Optional
+from typing import TYPE_CHECKING, Any, Dict, Optional
 
 from litellm._logging import verbose_logger
+from litellm.constants import LOCALHOST_URL_PATTERNS
 
 if TYPE_CHECKING:
     from a2a.types import AgentCard
@@ -26,16 +27,6 @@ try:
 except ImportError:
     pass
 
-# Patterns that indicate a localhost/internal URL that should be replaced
-# with the original base_url. This is a common misconfiguration where
-# developers deploy agents with development URLs in their agent cards.
-LOCALHOST_URL_PATTERNS: List[str] = [
-    "localhost",
-    "127.0.0.1",
-    "0.0.0.0",
-    "[::1]",  # IPv6 localhost
-]
-
 
 def is_localhost_or_internal_url(url: Optional[str]) -> bool:
     """
diff --git a/litellm/constants.py b/litellm/constants.py
index 25decd363a6..57670f2199a 100644
--- a/litellm/constants.py
+++ b/litellm/constants.py
@@ -306,6 +306,15 @@ DEFAULT_MAX_TOKENS_FOR_TRITON = int(os.getenv("DEFAULT_MAX_TOKENS_FOR_TRITON", 2
 #### Networking settings ####
 request_timeout: float = float(os.getenv("REQUEST_TIMEOUT", 6000))  # time in seconds
 DEFAULT_A2A_AGENT_TIMEOUT: float = float(os.getenv("DEFAULT_A2A_AGENT_TIMEOUT", 6000))  # 10 minutes
+# Patterns that indicate a localhost/internal URL in A2A agent cards that should be
+# replaced with the original base_url. This is a common misconfiguration where
+# developers deploy agents with development URLs in their agent cards.
+LOCALHOST_URL_PATTERNS: List[str] = [
+    "localhost",
+    "127.0.0.1",
+    "0.0.0.0",
+    "[::1]",  # IPv6 localhost
+]
 STREAM_SSE_DONE_STRING: str = "[DONE]"
 STREAM_SSE_DATA_PREFIX: str = "data: "
 ### SPEND TRACKING ###