Webhook
A webhook is an HTTP callback that a service sends to a URL you provide when an event happens, letting systems react to changes in real time without polling.
Instead of repeatedly asking 'has anything changed?', webhooks push a request to your endpoint when an event occurs — a payment succeeds, a row changes, a file uploads.
Receivers should verify webhook signatures, respond quickly with a 2xx, and process work asynchronously to stay reliable under load.
Webhooks are a common way to connect a backend to external services and to trigger downstream automation.
Related terms
See it in practice
Kolaybase gives you PostgreSQL, auth, storage, and a REST API in minutes.