Issues

• [v2] A listChanged onChanged callback that throws is called twice and ends in an unhandled rejection

  modelcontextprotocol/typescript-sdk#3175 · Filter by author YusefSyed opened on Nov 11, 2026

• [v2] Let a tool handler answer 401 invalid_token (re-authorization needed), not only a 403 scope challenge

  v2
  modelcontextprotocol/typescript-sdk#3173 · Filter by author buptliuhs opened on Nov 11, 2026
  7

• [v2] RequestMetaEnvelope is published as {}, so ctx.mcpReq.envelope keys are untyped

  v2
  modelcontextprotocol/typescript-sdk#3171 · Filter by author QuentinBisson opened on Nov 10, 2026
  2

• [v2] e2e protocol:timeout:reset-on-progress leaves unhandled rejections on its known-failing SSE variants, so vitest exits 1 on macOS

  v1v2
  modelcontextprotocol/typescript-sdk#3170 · Filter by author JQ100 opened on Nov 10, 2026
  1

• feat(client): Built-in WASM Script Client + Auto .d.ts Return Type Inference (Solving Missing outputSchema in Code Mode)

  v1v2
  modelcontextprotocol/typescript-sdk#3168 · Filter by author maran-t opened on Nov 9, 2026
  2

• subscriptions/listen retains abort listeners after immediately completed streams

  v2
  modelcontextprotocol/typescript-sdk#3163 · Filter by author JalenBuildsHub opened on Nov 8, 2026
  1

• Streamable HTTP: pre-2026 _meta protocolVersion claim on non-initialize requests is routed to serveModern and rejected with 400

  v2
  modelcontextprotocol/typescript-sdk#3159 · Filter by author godavid opened on Nov 7, 2026
  2

• 1.32.2 does not reject authorization-server metadata whose issuer does not echo the discovery URL (RFC 8414 section 3.3)

  v1
  modelcontextprotocol/typescript-sdk#3152 · Filter by author LHMisme420 opened on Nov 5, 2026
  2

• [v2] Client rounds integers above Number.MAX_SAFE_INTEGER in server messages

  v1v2
  modelcontextprotocol/typescript-sdk#3150 · Filter by author hansjm10 opened on Nov 4, 2026
  2

• [v2] toNodeHandler: a dropped GET stream blocks reconnects until the next keep-alive, so the client stops receiving notifications

  v2
  modelcontextprotocol/typescript-sdk#3148 · Filter by author SwapnilSkr opened on Nov 4, 2026
  3

• [v2] @modelcontextprotocol/node: importing toNodeHandler loads hono and @hono/node-server, which it doesn't use

  v2
  modelcontextprotocol/typescript-sdk#3145 · Filter by author omermizr opened on Nov 4, 2026
  3

• Streamable HTTP answers -32700 to a JSON body that is not a request

  v1v2
  modelcontextprotocol/typescript-sdk#3144 · Filter by author astrogilda opened on Nov 4, 2026
  3

• Dynamic client registration accepts plain-HTTP non-loopback and fragment redirect URIs

  v1v2
  modelcontextprotocol/typescript-sdk#3142 · Filter by author Enigmacker opened on Nov 1, 2026
  6

• [v2] createMcpHandler legacy fallback misses an abort that happens before it subscribes

  v2
  modelcontextprotocol/typescript-sdk#3136 · Filter by author mariano-aguero opened on Oct 30, 2026
  1

• [v2] Client.connect(): signal is ignored during the server/discover probe

  v2
  modelcontextprotocol/typescript-sdk#3133 · Filter by author Floriferous opened on Oct 30, 2026
  3

• [v2] Unnecessary zod schema conversion

  v2
  modelcontextprotocol/typescript-sdk#3132 · Filter by author phawxby opened on Oct 30, 2026
  2

• createMcpHonoApp: JSON body middleware has a size limit but no time limit (stalled body holds the request open)

  v1v2
  modelcontextprotocol/typescript-sdk#3131 · Filter by author timeleft-- opened on Oct 29, 2026
  2

• subscriptions/listen: let extensions add filter fields and events (Tasks taskIds)

  v2
  modelcontextprotocol/typescript-sdk#3127 · Filter by author sacha-ichbiah opened on Oct 29, 2026
  3

• createMcpHandler: Mcp-Param header validation and scope challenges only run when the factory returns an McpServer

  v2
  modelcontextprotocol/typescript-sdk#3126 · Filter by author sacha-ichbiah opened on Oct 29, 2026
  1

• 5 ready fixes available as PRs (blocked from opening)

  v1v2
  modelcontextprotocol/typescript-sdk#3125 · Filter by author nikolas-sapa opened on Oct 29, 2026
  1

• [v2] requireBearerAuth: drop error="invalid_token" when no credentials were sent and resource_metadata is set (RFC 6750 §3.1)

  v2
  modelcontextprotocol/typescript-sdk#3124 · Filter by author abubakar2906 opened on Oct 29, 2026
  2

• [v2] Test suite fails on Windows: 3 independent causes (CRLF checkout, symlink EPERM, POSIX signals)

  v2
  modelcontextprotocol/typescript-sdk#3117 · Filter by author DoroteoNavarrete opened on Oct 27, 2026
  4

• The maxToolInputElements refusal lacks the Input validation error: prefix that the schema refusal carries

  v1v2
  modelcontextprotocol/typescript-sdk#3111 · Filter by author mihai-r-lupu opened on Oct 27, 2026
  3

• server: registeredResource.update and registeredResourceTemplate.update desync title and metadata.title when updating metadata alone

  v1v2
  modelcontextprotocol/typescript-sdk#3103 · Filter by author shafiktanbir opened on Oct 26, 2026
  6

• server: memorySkillFiles.list() and read() do not normalize or validate non-canonical relative paths

  v2
  modelcontextprotocol/typescript-sdk#3102 · Filter by author shafiktanbir opened on Oct 26, 2026
  2