1.11.0

🚀 Tool Annotations

Adding support for Tools Annotations for better describing tool behavior, like whether it is read-only or destructive, as per protocol version 2025-03-26

Spec Version Update

Since we implemented most of the features in the recent spec we are updating the latest protocol version

Other Changes

• Pass requestId to handlers via metadata by @lforst in #358
• stateless had a wrong example by @TomasRup in #338
• fix SSE transport server examples by @ihrpr in #388
• Update README.md to include working examples by @simonedstrom96 in #384
• Pass request _meta to request handlers extra param by @iamarcel in #328
• Update stateless streamable http usecase by @c121914yu in #417
• Add 401 during POST request test case on StreamableHTTP transport to check auth flow by @fredericbarthelet in #411
• Ensure JSONRPCError messages are sent for streamable http by @mhart in #409
• nit: fix the comment format in the streamableHTTP.ts by @botengyao in #406
• comment: fix stateless comments that no session-id is included in any responses by @botengyao in #403
• Add stderr access before start by @hmwildermuth in #437

Please report any issues at https://github.com/modelcontextprotocol/typescript-sdk/issues.

New Contributors

• @lforst made their first contribution in #358
• @bhosmer-ant made their first contribution in #309
• @TomasRup made their first contribution in #338
• @simonedstrom96 made their first contribution in #384
• @iamarcel made their first contribution in #328
• @c121914yu made their first contribution in #417
• @mhart made their first contribution in #409
• @botengyao made their first contribution in #406
• @hmwildermuth made their first contribution in #437

Full Changelog: 1.10.2...1.11.0

1.10.2

What's Changed

• Update README.md to use correct location of InMemoryEventStore by @RamAnanth in #366
• Streamable Http - fix server initialization validation in Stateless servers by @ihrpr in #377
• Fixed Streamable HTTP Example by @ferrants in #374

New Contributors

• @RamAnanth made their first contribution in #366
• @ferrants made their first contribution in #374

Full Changelog: 1.10.1...1.10.2

1.10.1

What's Changed

• Streamable Http - fix examples for stateless server by @ihrpr in #363

Full Changelog: 1.10.0...1.10.1

1.10.0

Streamable HTTP release

This is the first release supporting the new Streamable HTTP transport from protocol version 2025-03-26, which supersedes the SSE transport from protocol version 2024-11-05. 🎉

• See the Streamable HTTP section of the README and the included examples for how to use this new transport in your client or server.
• There's also a guide on backwards compatibility, to maintain support with SSE clients or servers while the ecosystem upgrades to Streamable HTTP.

Please report any issues at https://github.com/modelcontextprotocol/typescript-sdk/issues.

Other Changes

• Improve SSE endpoint sessionId parameter handling by @akazwz in #177
• Mutations for McpServer by @geelen in #247
• StreamableHTTPClientTransport cleanup / fixes by @beaulac in #300
• Add helper functions to distinguish between jsonRPC message types by @fredericbarthelet in #281
• Bump to version 1.10.0 by @cliffhall in #305
• Include Authorization Info in Tool Calls (and request handlers generally) by @allenzhou101 in #166

New Contributors

• @akazwz made their first contribution in #177
• @geelen made their first contribution in #247
• @beaulac made their first contribution in #300
• @fredericbarthelet made their first contribution in #281
• @cliffhall made their first contribution in #305

Full Changelog: 1.9.0...1.10.0

1.9.0

What's Changed

• Correctly pass redirect_uri to tokens call by @praboud-ant in #222
• Add audio content by @nathanArseneau in #252
• Fix bug in reset timeout on progress by @Ozamatash in #160
• Add Proxy OAuth Server Provider by @allenzhou101 in #159
• Bump pkce up to 5.0.0 to fix CJS dependency issue by @heyitsaamir in #254
• #89 NPM provenance added by @davolokh in #190
• console.error pollution logs removed in tests by @davolokh in #194
• Fixing for windows terminal forcing \r\n by @Shchvova in #214
• docs: Update README for client method usage by @stonexer in #183
• feat: expose variableNames to retrieve all parameters from UriTemplate by @li-yechao in #188
• fix: 🐛 can't establish sse when server side enable compress by @Exlau in #231
• docs: Update README to not specify invalid capabilities by @morinokami in #265
• fix: Ensure the correct capability is checked for completion/complete by @morinokami in #268
• feat: Add completions capability in ServerCapabilitiesSchema by @morinokami in #269
• ✨ (client/index.ts): add optional RequestOptions parameter to connect… by @nanbingxyz in #224

New Contributors

• @praboud-ant made their first contribution in #222
• @nathanArseneau made their first contribution in #252
• @allenzhou101 made their first contribution in #159
• @heyitsaamir made their first contribution in #254
• @davolokh made their first contribution in #190
• @Shchvova made their first contribution in #214
• @stonexer made their first contribution in #183
• @li-yechao made their first contribution in #188
• @Exlau made their first contribution in #231
• @morinokami made their first contribution in #265
• @nanbingxyz made their first contribution in #224

Full Changelog: 1.8.0...1.9.0

1.8.0

What's Changed

• Improve transport in SSE server example by @samuelcolvin in #197
• Add cross spawn and the test for it by @zhibisora in #198
  • This should improve launching stdio servers on Windows as subprocesses

New Contributors

• @samuelcolvin made their first contribution in #197
• @zhibisora made their first contribution in #198

Full Changelog: 1.7.0...1.8.0

1.7.0

What's Changed

• Add sessionID to RequestHandlerExtra type for tool invocations so multi-user services can distinguish users by @jwvictor in #158

New Contributors

• @jwvictor made their first contribution in #158

Full Changelog: 1.6.1...1.7.0

1.6.1

What's Changed

• Add timeout reset on progress notifications by @Ozamatash in #152
• Misc fixes in auth by @jerome3o-anthropic in #157
• Add CLAUDE.md with SDK development guide by @ashwin-ant in #163

New Contributors

• @Ozamatash made their first contribution in #152

Full Changelog: 1.6.0...1.6.1

1.6.0

First release containing auth

This this the first release containing support for the draft auth proposal. These features are still WIP - so be warned there might be breaking changes in the future.

What's Changed

• Client implementation of MCP auth by @jspahrsummers in #144
• Update esbuild to resolve security advisory by @jspahrsummers in #154
• fix: drop unresolved union members in zod schemas by @disintegrator in #150
• Server implementation of MCP auth by @jspahrsummers in #151

New Contributors

• @disintegrator made their first contribution in #150

Full Changelog: 1.5.0...1.6.0

1.5.0

What's Changed

• Update README.md new SSE Server to match defaults in inspector by @ihrpr in #140
• Update README.md about client.callTool by @funwarioisii in #141
• add cwd to StdioServerParameters by @sestinj in #146

New Contributors

• @ihrpr made their first contribution in #140
• @funwarioisii made their first contribution in #141
• @sestinj made their first contribution in #146

Full Changelog: 1.4.1...1.5.0