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

1.4.1

What's Changed

• Improve SSE error code reporting by @jspahrsummers in #137

Full Changelog: 1.4.0...1.4.1

1.4.0

What's Changed

• Add instructions for starting the server transport by @jspahrsummers in #132
• More README improvements by @jspahrsummers in #136
• feat: add mcp client instruction support by @kalvinnchau in #133
• Use eventsource package, to permit custom headers for SSE by @jspahrsummers in #134

Full Changelog: 1.3.2...1.4.0

1.3.2

What's Changed

• Fix attempted double registration of completion handlers by @jspahrsummers in #131

Full Changelog: 1.3.1...1.3.2

1.3.1

What's Changed

• Fix README examples not using ResourceTemplate class by @jspahrsummers in #125
• Fix registering multiple tools/resources/prompts by @jspahrsummers in #126

Full Changelog: 1.3.0...1.3.1

1.3.0

What's Changed

This release introduces a simplified, Express-like API, similar in spirit to the FastMCP API of the Python SDK, but adapted to the conventions of the JavaScript ecosystem.

The simplified API should make it easier to develop and iterate on MCP servers, as tools and resources are now easier to declare incrementally. See the quick start in the README for more information.

Full Changelog: 1.2.0...1.3.0

1.2.0

What's Changed

• fix: add cjs format support by @ycjcl868 in #110
• feat: add optional instructions field to server _oninitialize by @kalvinnchau in #120

New Contributors

• @ycjcl868 made their first contribution in #110
• @kalvinnchau made their first contribution in #120

Full Changelog: 1.1.1...1.2.0

1.1.1

What's Changed

• Improve type inference from Zod schemas by @jspahrsummers in #114
• Added clean shutdown + tests by @jerome3o-anthropic in #115

Full Changelog: 1.1.0...1.1.1

1.1.0

What's Changed

• chore: satisfies npm-pkg-lint & publint by @nekomeowww in #94
• Add missing imports in README.md example by @TheFloatingString in #100
• feat(client/sse): add {EventSource,Request}Init options param by @chrisdickinson in #109
• Updates SDK error codes to use JSON-RPC server error range by @sumitesh9 in #103

New Contributors

• @TheFloatingString made their first contribution in #100
• @chrisdickinson made their first contribution in #109
• @sumitesh9 made their first contribution in #103

Full Changelog: 1.0.4...1.1.0