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HomeDocsModel Context Protocol 20 Oct 2026
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Sampling changedspecification/draft/client/sampling

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Upstream edited this page at 20 Oct 2026 20:02 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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55> **Deprecated**: The Sampling feature is deprecated as of protocol version
66> `2026-07-28`
77> ([SEP-2577](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2577)).
8> Under the [feature lifecycle policy](/community/feature-lifecycle), it remains
8> Under the [feature lifecycle policy](/community/feature-lifecycle.md), it remains
99> in the specification for at least twelve months after this revision's release
1010> before it becomes eligible for removal. New implementations **SHOULD NOT**
1111> adopt it; existing implementations **SHOULD** migrate to integrating directly
1212> with LLM provider APIs. See the [deprecated features
13> registry](/specification/draft/deprecated).
13> registry](/specification/draft/deprecated.md).
1414 
1515The Model Context Protocol (MCP) provides a standardized way for servers to request LLM
1616sampling ("completions" or "generations") from language models via clients. This flow
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9494>
9595> The `includeContext` parameter values `"thisServer"` and `"allServers"` are
9696> deprecated under the [feature lifecycle
97> policy](/community/feature-lifecycle#deprecating-a-feature)
97> policy](/community/feature-lifecycle.md#deprecating-a-feature)
9898> ([SEP-2596](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2596));
9999> they will be removed no later than the Sampling feature itself. Servers
100100> **SHOULD** avoid using these values (e.g. can just omit `includeContext` since
101101> it defaults to `"none"`), and **SHOULD NOT** use them unless the client
102102> declares `sampling.context` capability. See the [deprecated features
103> registry](/specification/draft/deprecated).
103> registry](/specification/draft/deprecated.md).
104104 
105105## Protocol Messages
106106 
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