Glossary
Cash-in
Cash-in is money coming into a platform — receiving a payment, for example via PIX.
Cash-in is all the money coming into your operation: receiving a customer payment. In the PIX context, it's when you create a charge (QR Code or PIX copy-paste) and the payer transfers the amount.
Automating cash-in via API means your application creates the charge and is notified by webhook the moment the PIX is confirmed — no manual checking.