v1.24.3

Compare Source

What's Changed

• chore: fix dev dependency security vulnerabilities by @​felixweinberger in #​1227
• chore(deps): bump express from 5.0.1 to 5.2.1 in the npm_and_yarn group across 1 directory by @​dependabot[bot] in #​1228
• fix: release HTTP connections after POST responses by @​mattzcarey in #​1214
• fix: skip priming events and closeSSEStream for old protocol versions by @​felixweinberger in #​1233
• chore: bump version for patch release by @​felixweinberger in #​1235

Full Changelog: modelcontextprotocol/typescript-sdk@1.24.2...1.24.3

v1.24.2

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What's Changed

• feat: add optional resource annotations by @​vhorvath2010 in #​954
• chore: refresh CLAUDE.md by @​LucaButBoring in #​1217
• refactor: make Server class framework-agnostic by moving express to separate module by @​cytle in #​1223
• chore: bump version to 1.24.2 by @​pcarleton in #​1224

New Contributors

• @​vhorvath2010 made their first contribution in #​954
• @​cytle made their first contribution in #​1223

Full Changelog: modelcontextprotocol/typescript-sdk@1.24.1...1.24.2

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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v1.23.1

Compare Source

Fixed:

• Disabled SSE priming events to fix backwards compatibility - 1.23.x clients crash on empty SSE data (JSON.parse(""))

This is a patch for servers still on 1.23.x that were breaking clients not handling the the 1.24.x priming event behavior with empty SSE data fields. See #​1233 for more details.

Full Changelog: modelcontextprotocol/typescript-sdk@1.23.0...1.23.1

v1.23.0

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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

v1.22.0

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What's Changed

• registerTool: accept ZodType for input and output schema by @​ksinder in #​816
• SEP-1319: Decouple Request Payloads, Remove passthrough iteration, Typecheck fixes by @​KKonstantinov in #​1086
• add pkg-pr-new bot by @​pcarleton in #​1088
• Upgrade to Node LTS by @​mattzcarey in #​1072
• change step name by @​pcarleton in #​1089
• SEP-1034: Default values for Elicitation Schemas by @​KKonstantinov in #​1096
• SEP-1330: Compatibility with SEP-1034 by @​KKonstantinov in #​1100
• Implementation of SEP-986: Specify Format for Tool Names by @​kentcdodds in #​900
• [auth] Fix march spec fallback for metadata discovery by @​pcarleton in #​1108
• chore: bump version for release by @​felixweinberger in #​1110

New Contributors

• @​ksinder made their first contribution in #​816

Full Changelog: modelcontextprotocol/typescript-sdk@1.21.1...1.22.0

v1.21.2

Compare Source

What's changed

This is a patch release for a regression highlighted by #​1103

This patch contains only the cherry picked fix in #​1108

Full Changelog: modelcontextprotocol/typescript-sdk@1.21.1...1.21.2

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