A unified API normalizes data into one common schema, and global payroll needs the country-specific detail that a common schema removes.
Unified APIs cover the most common payroll systems and the core employee fields. Local providers in smaller countries, the full structure of payroll result tables and the fields required for statutory reporting are usually outside a unified API’s coverage.
A common schema also merges country-specific pay components into generic fields, so corrected data cannot be written back to the local provider in the format the provider requires.
