various ATS APIs (Workday

Workday’s recruiting and staffing APIs provide the programmatic infrastructure to sync candidate data, job requisitions, and hiring workflows with enterprise HR systems.

Workday offers a dual-protocol API suite (REST and SOAP) designed to bridge the gap between external recruitment tools and core human capital management. Developers use the Recruiting and Staffing modules to automate high-volume tasks like posting job requisitions, retrieving candidate applications, and transitioning pre-hires into active worker records. These APIs support OAuth 2.0 for secure, token-based authentication and handle complex data structures through specific endpoints like /jobPostings and /workers. By leveraging these interfaces, teams eliminate manual data entry and maintain a single source of truth for talent acquisition across the enterprise.

https://developer.workday.com/