API (interfaccia di programmazione dell'applicazione)

APIs expose functionality machine-to-machine: reporting extraction, conversion registration, partner provisioning, payment initiation — the integration currency of the industry.

Judging API quality during procurement

Coverage (can you do via API everything the UI does? — the gap is your future manual labor), documentation currency, versioning and deprecation policy, rate limits against your real volumes, sandbox fidelity, and auth hygiene. For affiliate platforms specifically: full statistics extraction (partners’ BI teams will ask), conversion APIs for S2S flows, and webhook coverage for events. API quality is product quality wearing engineering clothes; weak APIs tax every subsequent quarter.