Version Packages

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Releases

@modelcontextprotocol/client@2.3.2

Patch Changes

• #2762 b022522 Thanks @pcarleton! - x-mcp-header on a number-typed tool parameter is now rejected, matching the 2026-07-28 spec ("Parameters with type number are not permitted"; clients MUST exclude such tools from tools/list). Previously number was accepted only to satisfy an older conformance fixture that has since been corrected. integer, string and boolean are unaffected.

• Updated dependencies []:

  • @modelcontextprotocol/core@2.3.2

@modelcontextprotocol/server@2.3.2

Patch Changes

• #2960 43c45f4 Thanks @claude! - A server whose tool puts x-mcp-header on a number-typed parameter keeps checking that tool's Mcp-Param-* headers on tools/call, as 2.3.0 does: a header that is missing for a value in the body, or that disagrees with the body, is answered 400 with JSON-RPC error -32020. Clients on a 2026-07-28 connection other than stdio no longer list such a tool and send no Mcp-Param-* headers for it, so a call that carries a value for a declared parameter is rejected the same way; the server logs a warning each time tools are listed. Use an integer (z.int()) or remove the annotation.

• #3005 b381559 Thanks @chaeyn! - Reflect resource and resource template update({ title }) changes in list responses. Preserve other metadata and individual resource titles when a template supplies list entries.

• #2762 b022522 Thanks @pcarleton! - x-mcp-header on a number-typed tool parameter is now rejected, matching the 2026-07-28 spec ("Parameters with type number are not permitted"; clients MUST exclude such tools from tools/list). Previously number was accepted only to satisfy an older conformance fixture that has since been corrected. integer, string and boolean are unaffected.

• Updated dependencies []:

  • @modelcontextprotocol/core@2.3.2

@modelcontextprotocol/server-legacy@2.3.2

Patch Changes

• Updated dependencies []:
  • @modelcontextprotocol/core@2.3.2

@modelcontextprotocol/codemod@2.3.2

@modelcontextprotocol/core@2.3.2

@modelcontextprotocol/core-internal@2.0.5

Patch Changes

• #2762 b022522 Thanks @pcarleton! - x-mcp-header on a number-typed tool parameter is now rejected, matching the 2026-07-28 spec ("Parameters with type number are not permitted"; clients MUST exclude such tools from tools/list). Previously number was accepted only to satisfy an older conformance fixture that has since been corrected. integer, string and boolean are unaffected.

• Updated dependencies []:

  • @modelcontextprotocol/core@2.3.2