An open API is a documented, supported interface that lets your own systems read and write another product’s data programmatically. In workplace software it is what connects booking and attendance data to the rest of the stack: HRIS, ITSM, badge access, BI tools and data warehouses.
Procurement teams treat an open API as insurance as much as integration: it means the data your workplace generates is genuinely yours to extract, join and keep. The practical checklist is short: REST endpoints, token authentication, rate limits you can live with, and documentation your engineers can use without a services contract.