Glossary

Webhook

Notification the platform sends to your system as soon as something happens, such as an approved sale or a refund.

A webhook is the opposite of the API. Instead of your system asking every so often whether there's been a sale, the platform notifies you the instant the event happens, sending the data to an address you registered.

It's what makes delivery immediate: an approved sale triggers access being granted, a refund triggers its removal.

Two rules avoid most problems. Verify the HMAC signature before trusting the notification, and handle re-sends of the same event without duplicating the effect, because the platform repeats the call when it doesn't receive confirmation.

A good integration is noticeable precisely because it never shows up: the sale lands, access opens and nobody files a ticket. Follow the steps to the end, including the part that looks obvious.
Wellington CostaGlobal Payments Specialist

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Written by Wellington Costa Global Payments Specialist

Writes about payment infrastructure, checkout conversion and chargeback reduction. Works directly with digital product sellers, affiliates and creators selling to more than 40 countries through Mundpay.