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