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In plain language
A webhook is a signal sent automatically when an event happens, such as a new request, payment, upload or form submission. Instead of repeatedly asking whether something changed, another system is notified the moment it does.
Technology - 5 min
What is a webhook?
A webhook is an automatic message from one system to another as soon as something happens. It allows processes to start immediately without constantly checking whether new information is available.
5 sections Practical explanation For teams and organizations
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How is it different from an API?
With an API, you typically request information actively. A webhook does the reverse: a system tells you something happened on its own. In many integrations, both are used together: a webhook triggers the process and an API handles the follow-up work.
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What is usually included?
A webhook often contains an event type, a timestamp, a record ID or a reference to more data. Sometimes that is enough by itself, and sometimes the receiving system must use an API call to fetch the full details.
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Where are the pitfalls?
A webhook needs to arrive reliably and be processed securely. That means paying attention to verification, retries, logging and what happens when the receiving system is temporarily unavailable. Without that, a simple integration can become surprisingly fragile.
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Why is it useful?
Webhooks make processes faster and more efficient. They are useful for notifications, workflow triggers, document processing and any situation where immediate follow-up matters. In well-designed systems, they reduce delay and avoid unnecessary polling traffic.
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