Michael Henderson enhanced the modelcontextprotocol/typescript-sdk by implementing support for the 'none' authentication method in the OAuth token endpoint, expanding the SDK’s integration flexibility. He updated the OAuth metadata to recognize 'none' as a valid option, allowing broader authentication scenarios while maintaining existing security guarantees. Using TypeScript and leveraging his expertise in API and backend development, Michael also revised the router logic and introduced targeted tests to ensure robust handling of the new authentication flow. His work focused on feature delivery and verification, reducing integration friction and aligning the SDK’s capabilities with evolving partner requirements and business objectives.