In November 2024, Iago Cavalcante developed and documented a Charge Expiration Patch API for the Open-Pix/openpix-developers repository, enabling users to update a charge’s expiration date through a patch operation. He defined the ChargePatchPayload schema in YAML, providing explicit request and response formats with clear examples, and updated the API documentation to reflect the new patch semantics. Leveraging skills in API documentation and OpenAPI Specification, Iago’s work laid the foundation for automating expiration management, streamlining processes for both customers and internal tools. The project focused on depth and clarity, ensuring maintainable documentation and robust schema definitions for future enhancements.