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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsModel Context Protocol 29 Jul 2026
One change · mcp

SEP-1686: Tasks changedseps/1686-tasks

Upstream edited this page at 29 Jul 2026 22:46 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 22 Oct 2026 20:37 UTC.

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1111> This SEP has reached Final status and is preserved as a historical record of
1212> the design as accepted. Changes made to the protocol after finalization are
1313> not reflected here. Refer to the [current
14> specification](/specification/latest) and its changelog for authoritative
14> specification](/specification/latest.md) and its changelog for authoritative
1515> requirements.
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3030## Abstract
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32> This SEP is preserved as a historical record of the experimental tasks feature shipped in the `2025-11-25` specification. The code examples below are non-normative pseudocode written against the v1 SDKs. The draft specification moves tasks out of the core protocol and into the `io.modelcontextprotocol/tasks` extension ([SEP-2663](./2663-tasks-extension.md)).
32> This SEP is preserved as a historical record of the experimental tasks feature shipped in the `2025-11-25` specification. The code examples below are non-normative pseudocode written against the v1 SDKs. The draft specification moves tasks out of the core protocol and into the `io.modelcontextprotocol/tasks` extension ([SEP-2663](/seps/2663-tasks-extension.md)).
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3434This SEP improves support for task-based workflows in the Model Context Protocol (MCP). It introduces both the **task primitive** and the associated **task ID**, which can be used to query the state and results of a task, up to a server-defined duration after the task has completed. This primitive is designed to augment other requests (such as tool calls) to enable call-now, fetch-later execution patterns across all requests for servers that support this primitive.
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