v1.24.1

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What's Changed

• fix(streamableHttp): fix infinite retries when maxRetries is set to 0 by @​mrorigo in #​1216
• chore: update protocol version to 2025-11-25 by @​dsp-ant in #​1218
• chore: bump version for release by @​felixweinberger in #​1219

New Contributors

• @​mrorigo made their first contribution in #​1216

Full Changelog: modelcontextprotocol/typescript-sdk@1.24.0...1.24.1

v1.24.0

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Summary

This release brings us up to speed with the latest MCP spec 2025-11-25. Take a look at the latest spec as well as the release blog post.

What's Changed

• fix: update spec links from latest to draft by @​domdomegg in #​1171
• Make sure to consume HTTP error response bodies by @​GreenStage in #​1173
• docs: add GET request handling for streamableHttp stateless mode by @​saharis9988 in #​1161
• SEP-1686: Tasks by @​LucaButBoring in #​1041
• Fix JSON parse error on SSE events with empty data by @​felixweinberger in #​1184
• Fix StreamableHTTPClientTransport instantiation by @​yuwzho in #​944
• feat: eslint rule to prefer node protocols by @​mattzcarey in #​1187
• fix: call tasks/result to deliver side-channel messages by @​felixweinberger in #​1185
• Add invalid_target oauth error (rfc 8707) by @​GreenStage in #​1183
• fix(client): use StreamableHTTPError instead of plain Error in send() by @​yamadashy in #​1178
• coerce 'expires_in' to be a number by @​adam-kuhn in #​1111
• Allow HTTP issuer URLs when MCP_DEV_MODE is enabled by @​jerome3o-anthropic in #​1189
• fix: update registerTool signature for proper typed ToolCallback by @​mattzcarey in #​1188
• SEP-1046: Client credentials flow for M2M without user interaction by @​KKonstantinov in #​1157
• adds the transitive @​types/express-serve-static-core dependency as a direct devDependency by @​mgyarmathy in #​1078
• Fix optional argument handling in prompts for Zod V4 by @​filip-bartuska-ipf in #​1199
• fix hanging stdio servers by @​mattzcarey in #​1200
• README refactor by @​KKonstantinov in #​1197
• [Docs] Fix typo by @​koic in #​1067
• feat: add closeSSEStream callback to RequestHandlerExtra by @​felixweinberger in #​1166
• fix: improve SSE reconnection behavior by @​felixweinberger in #​1191
• fix: normalize headers in sse transport by @​marcrasi in #​856
• feat: add closeStandaloneSSEStream for GET stream polling by @​felixweinberger in #​1203
• fix: normalize null to undefined in ElicitResultSchema content field by @​mattzcarey in #​1204
• Modify Origin header validation in validateRequestHeaders (streamableHttp.ts and sse.ts) to allow requests without an Origin, as they are not relevant to server DNS rebinding protection. by @​jacopoc in #​1205
• fix: allow zod 4 transformations by @​mattzcarey in #​1213
• feat: backwards-compatible createMessage overloads for SEP-1577 by @​felixweinberger in #​1212
• chore: bump version for release by @​felixweinberger in #​1215

New Contributors

• @​GreenStage made their first contribution in #​1173
• @​saharis9988 made their first contribution in #​1161
• @​yuwzho made their first contribution in #​944
• @​yamadashy made their first contribution in #​1178
• @​adam-kuhn made their first contribution in #​1111
• @​mgyarmathy made their first contribution in #​1078
• @​filip-bartuska-ipf made their first contribution in #​1199
• @​koic made their first contribution in #​1067
• @​marcrasi made their first contribution in #​856
• @​jacopoc made their first contribution in #​1205

Full Changelog: modelcontextprotocol/typescript-sdk@1.23.0...1.24.0

v1.23.0

Compare Source

What's Changed

• Migrate to vitest from jest by @​mattzcarey in #​1074
• ci: add workflow_dispatch trigger for manual CI runs by @​felixweinberger in #​1114
• Fix: @​types/node incompatibility with vite warnings on npm install by @​KKonstantinov in #​1121
• Fix: clean up accidental spec.types.ts by @​KKonstantinov in #​1122
• fix: Pass RequestInit options to auth requests by @​dsp-ant in #​1066
• SEP-1036: URL Elicitation by @​nbarbettini in #​1105
• add none to test and the router. by @​m-henderson in #​1116
• [auth] Adjust scope management to line up with SEP-835 by @​pcarleton in #​1133
• chore: add .idea/ to .gitignore by @​maxisbey in #​1134
• chore: remove unused @​types/eslint__js dependency by @​mattzcarey in #​1128
• feat: url based client metadata registration (SEP 991) by @​mattzcarey in #​1127
• feat: zod v4 with backwards compatibility for v3.25+ by @​dclark27 in #​1040
• fix: remove pnpm lock and regenerate package-lock by @​mattzcarey in #​1138
• docs: update installation instructions for zod peer dependency by @​mattzcarey in #​1139
• Implement SEP-1577 - Sampling With Tools by @​ochafik in #​1101
• Follow up: unify v3 and v4 zod types via describe matrix and a test helper by @​KKonstantinov in #​1141
• chore: Add deprecated marker to old elicitInput overload by @​nbarbettini in #​1142
• fix: Connect error in URL elicitation example by @​nbarbettini in #​1136
• Support upscoping on insufficient_scope 403 by @​Nayana-Parameswarappa in #​1115
• Support beta releases by publishing with --tag beta by @​felixweinberger in #​1146
• Bump version to 1.23.0-beta.0 by @​felixweinberger in #​1147
• SEP-1613: use.catchall() on inputSchema/outputSchema to support JSON Schema 2020-12 by @​felixweinberger in #​1135
• sampling: validate tools, tool_use, tool_result constraints by @​ochafik in #​1156
• fix: React to upstream RC schema changes for form mode elicitation requests by @​felixweinberger in #​1164
• feat: implement SEP-1699 SSE polling via server-side disconnect by @​felixweinberger in #​1129
• chore: bump package number for release by @​felixweinberger in #​1170

New Contributors

• @​nbarbettini made their first contribution in #​1105
• @​m-henderson made their first contribution in #​1116
• @​maxisbey made their first contribution in #​1134
• @​dclark27 made their first contribution in #​1040
• @​Nayana-Parameswarappa made their first contribution in #​1115

Full Changelog: modelcontextprotocol/typescript-sdk@1.22.0...1.23.0