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Implement SEP-2575: Make MCP Stateless #2804

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@localden

Tracking implementation of SEP-2575 for the 2026-07-28 MCP spec release.

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  1. added
    enhancementRequest for a new feature that's not currently supported
    on Jun 6, 2026
  2. maxisbey commented on Jun 30, 2026

    @maxisbey
    Contributor

    Closing as of v2.0.0b1: the SDK implements SEP-2575 — stateless self-describing requests, server/discover on both sides (the client's default mode='auto' probes it), per-request capabilities, and subscriptions/listen served via a pluggable event bus (#3035), including over stdio and other stream-pair transports (#3038). The server-stateless conformance scenario passes in full.

    Client-side consumption of subscriptions/listen streams (an optional client feature under the SEP) lands in a follow-up PR.

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