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v2: extension methods shadowed by legacy spec-method registry — custom tasks/get & tasks/cancel handlers unreachable (-32601 before handler lookup)

Status: Open.

#2598 In modelcontextprotocol/typescript-sdk;

· czh2774 opened on Aug 1, 2026

OAuth: isLoopbackHost rejects *.localhost subdomains, breaking host-based local dev (InsecureTokenEndpointError)

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.

#2591 In modelcontextprotocol/typescript-sdk;

· solirpa opened on Jul 31, 2026

[v2] createMcpHandler accepts modern POST without required MCP-Protocol-Version

Status: Open.

#2589 In modelcontextprotocol/typescript-sdk;

· allenzhou101 opened on Jul 30, 2026

_onprogress raises a protocol error for a race servers cannot avoid (progress notification arriving with the response)

Status: Open.

#2580 In modelcontextprotocol/typescript-sdk;

· sweetrb opened on Jul 30, 2026

Implement SEP-1933: Workload Identity Federation (Extension)

Status: Open.

#2576 In modelcontextprotocol/typescript-sdk;

· coding-bobo opened on Jul 29, 2026

codemod v1-to-v2 hoists rewritten imports above the file's license header

Status: Open.

#2575 In modelcontextprotocol/typescript-sdk;

· igorsaevets opened on Jul 29, 2026

subscriptions/listen cannot carry extension notifications (blocks notifications/tasks)

Status: Open.

#2569 In modelcontextprotocol/typescript-sdk;

· suavecito585 opened on Jul 28, 2026

normalizeHeaders references the bare global HeadersInit, breaking Node-only consumers with skipLibCheck: false

Status: Open.

#2568 In modelcontextprotocol/typescript-sdk;

· mdi-odoo opened on Jul 28, 2026

Streamable HTTP: pre-existing hardening items from the #2547 review

Status: Open.

#2562 In modelcontextprotocol/typescript-sdk;

· felixweinberger opened on Jul 27, 2026

InMemoryEventStore: standalone-stream resume broken by getStreamIdFromEventId split

Status: Open.

#2560 In modelcontextprotocol/typescript-sdk;

· felixweinberger opened on Jul 27, 2026

Streamable HTTP: JSON-response-mode stream mappings never complete their lifecycle

Status: Open.

#2559 In modelcontextprotocol/typescript-sdk;

· felixweinberger opened on Jul 27, 2026

Streamable HTTP: close replayed request streams once no in-flight requests remain

Status: Open.

#2558 In modelcontextprotocol/typescript-sdk;

· felixweinberger opened on Jul 27, 2026