Fix for Url Elicitation issue 1768 (#1780)

src/mcp/server/lowlevel/server.py

@@ -90,7 +90,7 @@ from mcp.server.lowlevel.helper_types import ReadResourceContents
 from mcp.server.models import InitializationOptions
 from mcp.server.session import ServerSession
 from mcp.shared.context import RequestContext
-from mcp.shared.exceptions import McpError
+from mcp.shared.exceptions import McpError, UrlElicitationRequiredError
 from mcp.shared.message import ServerMessageMetadata, SessionMessage
 from mcp.shared.session import RequestResponder
 from mcp.shared.tool_name_validation import validate_and_warn_tool_name
@@ -569,6 +569,10 @@ class Server(Generic[LifespanResultT, RequestT]):
                             isError=False,
                         )
                     )
+                except UrlElicitationRequiredError:
+                    # Re-raise UrlElicitationRequiredError so it can be properly handled
+                    # by _handle_request, which converts it to an error response with code -32042
+                    raise
                 except Exception as e:
                     return self._make_error_result(str(e))