This package provides a comprehensive set of tools for standardized URL annotation, designed to support autonomous data curation and integration. It includes: An ontology template (.owl file) for detailed URL structure representation Transformation rules (.json files) for mapping API-specific data classes to the ontology An Excel schema template (.xls file) for structured URL data entry These resources enable precise and consistent annotation of URL endpoints, facilitating seamless data exchange and knowledge discovery across diverse repositories. They are particularly valuable for enhancing AI-driven autonomous curation agents and supporting Linked Data initiatives.