SEP-2575: Make MCP Stateless - #2575

Merged

kurtisvg merged 69 commits into

modelcontextprotocol:mainfrom

kurtisvg:sep-1442-reborn

May 11, 2026

Commits on May 8, 2026

chore: migrate SEP-1442 into PR-based SEP format
kurtisvg
committed
ca30fd7
chore: assign PR number 2575 to SEP
kurtisvg
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8266c2a
chore: set sponsor
kurtisvg
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ef60c11
feat: remove session content and clean up SEP
kurtisvg
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d02d153
chore: generate SEP docs
kurtisvg
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74f0418
feat: address review feedback on SEP-2575
kurtisvg
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59e31eb
chore: regenerate and format SEP docs
kurtisvg
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9535230
fix: use io.modelcontextprotocol/ prefix for _meta keys
kurtisvg
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bf5ed88
fix: simplify security implications section
kurtisvg
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9692bc0
feat: rename to notifications/listen, remove GET endpoint, deprecate resource subscriptions
kurtisvg
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a17e8c1
fix: rename mcpProtocolVersion to protocolVersion
kurtisvg
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16c83ea
feat: move notification subscriptions into notifications/listen params
kurtisvg
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a002745
feat: add MissingRequiredClientCapability error, use TS interfaces for errors
kurtisvg
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38a8ba5
feat: use RequestMetaObject instead of Request for schema diffs
kurtisvg
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dc78242
fix: clarify first SSE event wording
kurtisvg
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e835622
chore: regenerate docs after rebase
kurtisvg
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f0d64cc
fix: clarify HTTP header and payload must match
kurtisvg
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0a79f5e
fix: include roots, logLevel, clientInfo in RequestMetaObject diff
kurtisvg
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1ffcaf7
chore: add open question on _meta vs top-level fields
kurtisvg
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4efd9db
fix: clarify unsupported protocol version covers known and unknown versions
kurtisvg
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3a24abc
fix: align UnsupportedProtocolVersionError with current spec
kurtisvg
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2f8e87d
docs: add FAQ on server/discover vs Server Card
kurtisvg
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f760e1f
fix: rename DiscoveryRequest/Result to DiscoverRequest/Result
kurtisvg
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f39f22a
fix: clarify server/discover is required for servers, optional for clients
kurtisvg
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c212b42
fix: require clientCapabilities on every request
kurtisvg
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30c3c2d
fix: explain how SEP-2260 and SEP-2322 eliminate server-to-client requests
kurtisvg
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496a9c5
fix: tighten missing capability error wording
kurtisvg
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1529765
fix: define absence semantics for _meta fields and defer roots to MRTR
kurtisvg
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faf8e67
fix: restructure Per-Request Client Capabilities section
kurtisvg
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c4a0c19
fix: remove ping RPC
kurtisvg
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09cbb49
fix: add logLevel to notifications/listen subscription filter
kurtisvg
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b9f1753
fix: rename notifications/listen to subscriptions/listen
kurtisvg
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7a541b8
fix: have ack notification confirm subscriptions server agreed to
kurtisvg
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dc4c2aa
fix: specify request cancellation behavior for HTTP and STDIO
kurtisvg
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b6c82ec
fix: make _meta required in SubscriptionsListenRequest
kurtisvg
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a84dbfa
feat: support multiple subscriptions with request ID correlation
kurtisvg
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6c420f4
fix: clarify STDIO backward-compat probe applies to dual-version clients only
kurtisvg
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a1968d5
fix: clarify missing capability check is for individual capabilities
kurtisvg
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da316b0
fix: clarify subscription lifecycle and remove stale result wording
kurtisvg
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87b48c6
feat: remove resumable streams in favor of tasks primitive
kurtisvg
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369e7b0
fix: clarify ping is removed in both directions
kurtisvg
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f7d68ef
docs: rewrite lifecycle.mdx (SEP-2575)
kurtisvg
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4a0661f
docs: rewrite transports.mdx (SEP-2575)
kurtisvg
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2a538c6
docs: update index.mdx for stateless model (SEP-2575)
kurtisvg
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6692e2b
docs: update cancellation.mdx for stateless model (SEP-2575)
kurtisvg
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cee8188
docs: remove ping from draft spec (SEP-2575)
kurtisvg
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1b04197
docs: replace resource subscribe with subscriptions/listen (SEP-2575)
kurtisvg
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066fb1d
docs: add subscriptions/listen page and update resources/logging (SEP-2575)
kurtisvg
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a500505
docs: update architecture.mdx for stateless model (SEP-2575)
kurtisvg
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d962745
docs: sweep guides for stateless model (SEP-2575)
kurtisvg
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db11120
docs: fix stale initialization references in draft spec (SEP-2575)
kurtisvg
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dcb5267
chore: mark SEP-2575 as Accepted
kurtisvg
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b460206
revert: restore guide files to pre-SEP-2575 state
kurtisvg
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dd1cdcf
fix: remove logLevel from subscriptions/listen filter
kurtisvg
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4f0f786
feat: update schema for stateless MCP (SEP-2575)
kurtisvg
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3c66ee3
docs: add server/discover page and note servers MUST implement it (SEP-2575)
kurtisvg
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195a56d
docs: document MissingRequiredClientCapabilityError in per-request _meta section (SEP-2575)
kurtisvg
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2d7af98
docs: remove stale roots listChanged references
kurtisvg
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ad108c5

Commits on May 9, 2026