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fastmcp.server.tasks.protocol

SEP-1686 task protocol handlers. Implements MCP task protocol methods: tasks/get, tasks/result, tasks/list, tasks/cancel, tasks/delete.

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Functions

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tasks_get_handler 

tasks_get_handler(server: FastMCP, params: dict[str, Any]) -> GetTaskResult
Handle MCP ‘tasks/get’ request (SEP-1686). Args:
  • server: FastMCP server instance
  • params: Request params containing taskId
Returns:
  • Task status response with spec-compliant fields

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tasks_result_handler 

tasks_result_handler(server: FastMCP, params: dict[str, Any]) -> Any
Handle MCP ‘tasks/result’ request (SEP-1686). Converts raw task return values to MCP types based on task type. Args:
  • server: FastMCP server instance
  • params: Request params containing taskId
Returns:
  • MCP result (CallToolResult, GetPromptResult, or ReadResourceResult)

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tasks_list_handler 

tasks_list_handler(server: FastMCP, params: dict[str, Any]) -> ListTasksResult
Handle MCP ‘tasks/list’ request (SEP-1686). Note: With client-side tracking, this returns minimal info. Args:
  • server: FastMCP server instance
  • params: Request params (cursor, limit)
Returns:
  • Response with tasks list and pagination

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tasks_cancel_handler 

tasks_cancel_handler(server: FastMCP, params: dict[str, Any]) -> CancelTaskResult
Handle MCP ‘tasks/cancel’ request (SEP-1686). Cancels a running task, transitioning it to cancelled state. Args:
  • server: FastMCP server instance
  • params: Request params containing taskId
Returns:
  • Task status response showing cancelled state