diff --git a/src/fastmcp/client/auth/oauth.py b/src/fastmcp/client/auth/oauth.py
index b858cc17d..7984a4299 100644
--- a/src/fastmcp/client/auth/oauth.py
+++ b/src/fastmcp/client/auth/oauth.py
@@ -80,7 +80,7 @@ class OAuthClientProvider(_MCPOAuthClientProvider):
         ServerOAuthMetadata instead of the restrictive MCP OAuthMetadata.
         """
         # Extract base URL per MCP spec
-        auth_base_url = self._get_authorization_base_url(server_url)
+        auth_base_url = self.context.get_authorization_base_url(server_url)
         url = urljoin(auth_base_url, "/.well-known/oauth-authorization-server")
 
         from mcp.types import LATEST_PROTOCOL_VERSION
diff --git a/src/fastmcp/server/auth/auth.py b/src/fastmcp/server/auth/auth.py
index 42d2919b8..fcb85c1af 100644
--- a/src/fastmcp/server/auth/auth.py
+++ b/src/fastmcp/server/auth/auth.py
@@ -43,3 +43,18 @@ class OAuthProvider(
         self.client_registration_options = client_registration_options
         self.revocation_options = revocation_options
         self.required_scopes = required_scopes
+
+    async def verify_token(self, token: str) -> AccessToken | None:
+        """
+        Verify a bearer token and return access info if valid.
+
+        This method implements the TokenVerifier protocol by delegating
+        to our existing load_access_token method.
+
+        Args:
+            token: The token string to validate
+
+        Returns:
+            AccessToken object if valid, None if invalid or expired
+        """
+        return await self.load_access_token(token)