fastmcp/docs/python-sdk/fastmcp-server-tasks-capabilities.mdx
2026-05-14 22:09:39 -04:00

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---
title: capabilities
sidebarTitle: capabilities
---
# `fastmcp.server.tasks.capabilities`
SEP-1686 task capabilities declaration.
## Functions
### `get_task_capabilities` <sup><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></sup>
```python
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).