> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mezmo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Webhook (WebSub)

> Accept RESTful webhook messages using the WebSub protocol, verifying payloads with an HMAC signature based on a configured signing key.

## Description

This source provides a way to accept RESTful Webhook messages using the WebSub protocol for verification.

## Configuration

This source corresponds to the [WebSub specification](https://www.w3.org/TR/websub/). All that is needed for this processor is the signing key to use to verify the payload with the HMAC digest.

### Configuration Options

| Option      | Description                                                       |
| ----------- | ----------------------------------------------------------------- |
| Signing key | This is the key used for the HMAC signature to verify the sender. |