fastmcp.server.tasks.capabilities

SEP-1686 task capabilities declaration.

Functions

get_task_capabilities ^{<a href="https://github.com/PrefectHQ/fastmcp/blob/main/src/fastmcp/server/tasks/capabilities.py#L13" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a>}

get_task_capabilities() -> ServerTasksCapability | None

Return the SEP-1686 task capabilities.

Returns task capabilities as a first-class ServerCapabilities field, declaring support for list, cancel, and request operations per SEP-1686.

Returns None if a compatible pydocket is not installed (no task support). Uses the canonical is_docket_available() check so that capability advertisement and handler registration stay in sync — otherwise a server with an old transitive pydocket would advertise task support and then return "method not found" when clients invoked it.

Note: prompts/resources are passed via extra_data since the SDK types don't include them yet (FastMCP supports them ahead of the spec).