fix(deps): update module github.com/modelcontextprotocol/go-sdk to v1.7.0 #130
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This PR contains the following updates:
v1.6.1→v1.7.0Release Notes
modelcontextprotocol/go-sdk (github.com/modelcontextprotocol/go-sdk)
v1.7.0Compare Source
This release brings full support for protocol version
2026-07-28.The wire protocol is largely rewritten: a stateless model with per-request
_meta, a newserver/discoverRPC replacing theinitializehandshake, multi-round-trip requests (MRTR) replacing server-initiated calls, a unifiedsubscriptions/listenstream replacing free-floating change notifications, standardised HTTP headers, and the formal deprecation of the roots, sampling, and logging features.The streamable HTTP transport accepts requests at protocol version
2026-07-28only whenStreamableHTTPOptions.Stateless = true. If you want to expose the new protocol over HTTP, setStateless = true; if you want to keep stateful sessions, your clients will negotiate down to2025-11-25.Backward compatibility with
2025-11-25and earlier is preserved on every endpoint. The SDK negotiates the highest mutually-supported version at connect time. The new protocol is enabled by default for new clients; existing legacy clients and servers continue to work unchanged.This release consolidates everything shipped in
v1.7.0-pre.1,v1.7.0-pre.2, andv1.7.0-pre.3. Thank you to everyone who exercised the pre-releases and filed feedback.v1.7.0-pre.3is already successfully used by GitHub, serving more than half a million users.Make MCP Stateless (SEP-2575) & Sessionless (SEP-2567)
The
initialize/notifications/initializedhandshake is removed in2026-07-28. Each request now carries_meta.io.modelcontextprotocol/{protocolVersion,clientInfo,clientCapabilities}so the server can validate the peer without state. A newserver/discoverRPC lets clients learn the server's supported versions and capabilities up front; the SDK falls back to legacyinitializeif discover fails. Resumability (Last-Event-ID, standalone GET) is removed;ping,logging/setLevel,resources/subscribe, andresources/unsubscribeare also removed on this revision and rejected withMethodNotFound.MissingRequiredClientCapabilityerror data by @guglielmo-san (#1005)UnsupportedProtocolVersionerror by @guglielmo-san (#989)Subscriptions listen (SEP-2575)
The legacy
tools/list_changed,prompts/list_changed,resources/list_changed, andresources/updatednotifications are replaced by a single long-livedsubscriptions/listenrequest whose response stream multiplexes every change notification the client opted into, each tagged withio.modelcontextprotocol/subscriptionId. The SDK opens this stream automatically onClient.Connectwhen the corresponding list-changed handler is set; servers route notifications only to subscribed sessions.subscriptions/listenrpc (SEP-2575) by @guglielmo-san (#1007)Multi Round-Trip Requests (SEP-2322)
Server-to-client requests for elicitation, sampling, and roots are no longer issued as fresh JSON-RPC requests. Instead a tool/prompt/resource handler returns an
InputRequiredResultwhoseinputRequestsfield carries the requests; the client fulfils each and retries the original call withinputResponsespopulated. The SDK ships client- and server-side middleware that handles this transparently in both directions, including a server-side compatibility shim that lets MRTR handlers also work against legacy clients.Cacheable list results (SEP-2549)
tools/list,prompts/list,resources/list,resources/templates/list,resources/read, andserver/discoverresults now carryttlMsandcacheScopefields. Clients honour them as freshness hints to reduce polling; shared intermediaries usecacheScopeto decide whether responses may be cached.DiscoverResultby @guglielmo-san (#1022)HTTP standardization (SEP-2243)
The streamable HTTP transport now mirrors selected fields from the JSON-RPC body into HTTP headers (
Mcp-Method,Mcp-Name,Mcp-Protocol-Version,Mcp-Param-*) so network intermediaries can route and observe MCP traffic without deep packet inspection. Tools can declare per-parameter passthrough viax-mcp-headerannotations on their input schema. Body↔header mismatches return-32020 HeaderMismatch.x-mcp-headerby @guglielmo-san (#915)Deprecation of roots, sampling, and logging (SEP-2577)
Roots, sampling, and logging are formally deprecated on the
2026-07-28revision. The SDK continues to expose the corresponding Go types for backward compatibility with older peers, but new servers should not rely on them.Behavior changes guarded by MCPGODEBUG
Seven escape-hatch flags are added in this release to restore behavior that changed as part of spec-compliance fixes. All will be removed in v1.9.0.
customresnotfounderrcode=1— restore the old-32002code forResourceNotFoundError.hintomitempty=1— restoreomitemptyonToolAnnotations.ReadOnlyHintandIdempotentHint. The default now always serializes these fields because the Go types are barebool(not*bool), so omittingfalsemade it indistinguishable from "unset".allowsessionsinstateless=1— restore session-id handling on stateless streamable HTTP servers (read/writeMcp-Session-Id, acceptDELETE). The default behavior is now what the spec requires: stateless servers ignore session IDs entirely and return405 Method Not AllowedforDELETE.nomethodnotfoundcodeinerror=1— restore the previous STDIO behavior where the JSON-RPCMethodNotFound(-32601) code is omitted from the error response for unhandled methods. The default now includes the code.noprotocolerrorbody=1— restore the previous streamable HTTP client behavior of not decoding the JSON-RPC error body of a non-2xx HTTP response. The default now surfaces the underlying JSON-RPC error.nowrapinvalidparams=1— restore the previous behavior of returning rawunmarshalParamserrors from receiving handlers instead of wrapping them as a JSON-RPC-32602 Invalid paramserror. Introduced by #1087.disablecompleteparamsvalidation=1— restore the previous behavior of acceptingcompletion/completeresponses without validating the presence of thecompletionparams object. Introduced by #1080.Other Changes to the SDK
Streamable HTTP transport:
streamableClientConn.Closeby @blackwell-systems (#929)Custom methods and MCPGODEBUG-guarded fixes:
unmarshalParamswith jsonrpc error by @guglielmo-san (#1087)CompleteResultby @guglielmo-san (#1080)Additional spec-compliance fixes:
DiscoverResult(SEP-2575) by @guglielmo-san (#1097)subscriptions/listenby @guglielmo-san (#1088)server/discoverfor<2026-07-28requests by @guglielmo-san (#1084)resultTypeon new-protocol responses by @ychampion (#1060)ElicitParamsby @guglielmo-san (#1078)ApplyDefaultwhenres.Content == nilby @guglielmo-san (#1069)InitializeParamsin Meta by @guglielmo-san (#1049)protocolVersionin legacy initialize toprotocolVersion20251125by @guglielmo-san (#1051)NotificationSubscriptionsa mandatory field by @guglielmo-san (#1050)omitemptyReadOnlyHintinToolAnnotationsby @pvlbzn (#908)AddToolwhen schema is nil by @wucm667 (#918)tool.InputSchemaandtool.OutputSchemavalidation (SEP-2106) by @guglielmo-san (#1009)2026-06-30to2026-07-28by @guglielmo-san (#1015)2026-07-28to the supported protocol versions by @guglielmo-san (#1020)Auth and OAuth:
ClockSkewoption toRequireBearerTokenOptionsby @BorisTyshkevich (#969)AllowMissingExpirationoption toRequireBearerTokenOptionsby @BorisTyshkevich (#971)MatchesResourcehelper (RFC 9728/8707 audience comparison) by @BorisTyshkevich (#970)oauth2.RetrieveErrorduring token refresh by @smlx (#917)Session, keepalive and misc:
golang.org/x/time/rateforLoggingHandlerrate limiting by @wucm667 (#927)Conformance tests, documentation and CI:
troubleshoot.mdto includeresultTypeby @guglielmo-san (#1081)github/codeql-actionfrom 4.35.1 to 4.35.2 by @dependabot (#922)github/codeql-actionfrom 4.35.2 to 4.36.0 by @dependabot (#986)actions/cachefrom 5.0.4 to 5.0.5 by @dependabot (#923)actions/cachefrom 5.0.5 to 6.1.0 by @dependabot (#1065)actions/setup-nodefrom 6.3.0 to 6.4.0 by @dependabot (#921)actions/upload-artifactfrom 7.0.0 to 7.0.1 by @dependabot (#920)actions/checkoutfrom 6.0.2 to 7.0.0 by @dependabot (#1040)actions/setup-pythonfrom 6.2.0 to 6.3.0 by @dependabot (#1038)actions/setup-gofrom 6.4.0 to 6.5.0 by @dependabot (#1066)github/codeql-action/upload-sariffrom 4.36.0 to 4.36.2 by @dependabot (#1039)New Contributors
Full Changelog: https://github.com/modelcontextprotocol/go-sdk/compare/v1.6.0...v1.7.0
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