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[v2] OAuth discovery validates any /.well-known/openid-configuration document as OIDC, rejecting conforming RFC 8414 metadata

Status: Open.

#2733 In modelcontextprotocol/typescript-sdk;

· cliffhall opened on Aug 28, 2026

StreamableHTTP server transport returns bare 400 for a notification when the request has Connection: close

Status: Open.

#2730 In modelcontextprotocol/typescript-sdk;

· amirtafreshi opened on Aug 27, 2026

UriTemplate.match() does not percent-decode extracted values

Status: Open.

#2728 In modelcontextprotocol/typescript-sdk;

· MahathirMohammadShuvo opened on Aug 27, 2026

remove() is a no-op after a handle is renamed, and the entry stays callable

Status: Open.

#2723 In modelcontextprotocol/typescript-sdk;

· YatsukBogdan1 opened on Aug 26, 2026

[v2] Era-negotiation probe drops spec-conformant server/discover responses (top-level resultType/_meta) and misclassifies modern servers as legacy

Status: Open.

#2722 In modelcontextprotocol/typescript-sdk;

· Seinra opened on Aug 26, 2026

outputSchema always emitted as JSON Schema draft-07, breaking clients that only accept 2020-12

Status: Open.

#2721 In modelcontextprotocol/typescript-sdk;

· papayet opened on Aug 26, 2026

Docs: registerClient's @deprecated notice cites SEP-2577; DCR deprecation is PR #2858 (SEP-2577 is Roots/Sampling/Logging)

Status: Open.

#2719 In modelcontextprotocol/typescript-sdk;

· dmcnelis opened on Aug 26, 2026

[v2] Incompatibility with refresh_tokens from Azure when client_id=resource_id

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2718 In modelcontextprotocol/typescript-sdk;

· lukeyeager opened on Aug 26, 2026

Semantics question: how should tool-call telemetry count cancelled or retried tools/call requests?

Status: Open.

#2715 In modelcontextprotocol/typescript-sdk;

· roy-tong opened on Aug 25, 2026

registerTool with zod raw shape: refine/superRefine/transform are silently dropped from validation

v1Issues / PRs related to v1.xIssues / PRs related to v1.x

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2705 In modelcontextprotocol/typescript-sdk;

· qiyueqiu opened on Aug 23, 2026

Stateless StreamableHTTPServerTransport: per-request requirement is invisible through the Node wrapper (500 with empty body)

v1Issues / PRs related to v1.xIssues / PRs related to v1.x

v2Ideas, requests and plans for v2 of the SDK which will incorporate major changes and fixesIdeas, requests and plans for v2 of the SDK which will incorporate major changes and fixes

Status: Open.

#2704 In modelcontextprotocol/typescript-sdk;

· qiyueqiu opened on Aug 23, 2026

Deno: TS2307 on all .js subpath imports — './*' exports map types to '*.js.d.ts'

v1Issues / PRs related to v1.xIssues / PRs related to v1.x

Status: Open.

#2701 In modelcontextprotocol/typescript-sdk;

· johnhenry opened on Aug 22, 2026