# What are webhooks? Imagine you have a toy mailbox in your room, and sometimes your friends send you letters or small gifts. Normally, you would have to wait by the mailbox and check if there's anything new. But what if the mailbox could let you know as soon as something arrives? Well, that's kind of how webhooks work. Instead of waiting and checking if something happened on a website or app, webhooks are like special signals that get sent to you automatically whenever something important occurs. It's like the website or app is saying, "Hey, something new happened! Come and see!" Just like your mailbox needs to know your address to send you things, webhooks need to know where to send the signals. You set up a special address, like your email or phone number, and tell the website or app to send the signals there. So whenever something happens on Simple Phones, like a new message or call, it sends a signal to your special address. Then you can quickly know that something happened without having to keep checking all the time. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.simplephones.ai/webhooks/what-are-webhooks.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.