Tasks extension

Tasks extension: An official MCP extension for long-running operations with polling and durable handles, moved out of core in 2026-07-28. Example: The extension id is io.modelcontextprotocol/tasks. Next in the glossary is Tool: A function an MCP server offers for the model to call, with a name, description and input schema.

Definition

An official MCP extension for long-running operations with polling and durable handles, moved out of core in 2026-07-28.

Example, with source

The extension id is io.modelcontextprotocol/tasks. (modelcontextprotocol.io, read 4 November 2026)

Where it appears on this site

• MCP

Neighbouring terms

• Streamable HTTP: The MCP HTTP binding where each message is a POST to one endpoint and replies come as JSON or a request-scoped SSE stream.
• Tool: A function an MCP server offers for the model to call, with a name, description and input schema.
• Tool annotations: Hints on a tool such as readOnlyHint and destructiveHint that tell clients how risky a call is.