chore(deps): bump github.com/modelcontextprotocol/go-sdk from 1.6.1-0.20260529072934-189a85ad92ff to 1.6.1

[dependabot]

Bumps github.com/modelcontextprotocol/go-sdk from 1.6.1-0.20260529072934-189a85ad92ff to 1.6.1.

Release notes

Sourced from github.com/modelcontextprotocol/go-sdk's releases.

v1.6.1

This release adds an MCPGODEBUG flag to opt out of the Content-Type check on POST requests.

Behavior Changes

Prior to v1.6.0 (v1.4.0...v1.5.0), the Content-Type check on POST requests was gated by the same disablecrossoriginprotection MCPGODEBUG flag as the cross-origin protection. In v1.6.0, the cross-origin protection was disabled by default (replaced by the opt-in enableoriginverification flag), but the Content-Type check was kept on unconditionally, leaving no way to disable it. This release restores an escape hatch for both the Streamable HTTP and SSE transports: setting MCPGODEBUG=disablecontenttypecheck=1 skips the Content-Type: application/json validation on POST requests. See #957.

What's Changed

• mcp: add MCPGPDEBUG for opt-in Content-Type check by @​guglielmo-san in modelcontextprotocol/go-sdk#972

Full Changelog: modelcontextprotocol/go-sdk@v1.6.0...v1.6.1

Commits

• See full diff in compare view