ADP Embedded Payroll (RUN)
ADP Embedded Payroll lets a software platform embed complete RUN Powered by ADP payroll screens — "Journeys" for People, Payroll, Reports, Taxes, Onboarding and Settings — inside its own product via a client-side JavaScript SDK and an iframe, alongside REST APIs for mutual-client linking and SSO. It is the only ADP developer library still actively maintained, and it has its own documentation site with a published llms.txt.