Webhook: Real-Time Data Communication
A Webhook is a way for one app to provide other applications with real-time information. A webhook delivers data to other applications as it happens, meaning you get data immediately, rather than polling for it manually.
Think of a webhook as a “Reverse API.” Instead of your website asking a service for an update (polling), the service “pushes” the update to your website the moment an event occurs. This is much more efficient and ensures that your system reacts instantly to external triggers, like a successful payment or a new lead in a CRM.
Example: When a customer pays for an order via PayPal, PayPal sends a webhook notification to your website. Your website receives this “message” and immediately changes the order status to “Processing” and sends a confirmation email.
Frequently Asked Questions
An API is like you calling a friend to ask for info. A Webhook is like your friend calling you the moment they have news. One is “Pull” (API), the other is “Push” (Webhook).
They can be. Most services provide a “Secret Key” or signature that your website checks to verify that the data actually came from the trusted source and not an attacker.
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