A webhook is an HTTP callback. When an event happens in system A, system A proactively sends an HTTP request (usually a POST) to a URL you provided, carrying data about that event.
In short: instead of you asking over and over, the other system tells you when something happens.
Real-life analogy: You order something online. Polling = walking to the front door every 10 minutes to check if the courier has arrived. Webhook = leaving your phone number so the courier calls you when they're outside.
PionPay helps online shops and businesses automatically confirm bank transfer payments and get balance change notifications right in Telegram, Zalo OA, Lark, Google Sheets, or via webhook. No more checking your banking app or manually reconciling every transaction.
PionPay connects to banks' Open Banking APIs to receive balance updates and match them with the corresponding orders. It currently supports Vietnamese banks VPBank, ACB and BIDV.
