Trigger Zaps from webhooks

• Click the Trigger step.
• Search for and select Webhooks by Zapier.
• Click the Trigger Event dropdown menu and select your webhook type.
• Click Continue.

For most webhooks, the Catch Hook trigger will be the best option. Catch hooks work by giving you a unique URL that you can make POST requests to. If you want Zapier to make a GET request of an external URL to check for new entries, use a Retrieve Poll webhook trigger.

Next, you’ll be given the URL for your webhook and can set it up:

• Silent Mode: some apps need to receive an empty body. If you don’t want to receive content in the response from Zapier, select the Silent Mode checkbox.
• Pick Off A Child Key: this is the specific key you want Zapier to use from the request you make to the webhook URL. This is useful if you only need a subset of the data that is sent to the webhook.

Open the app you want to connect to Zapier, and find its webhooks settings page. You'll often find it in your app's core settings or options page. If you’re unable to find it, check your app's help and support documentation.

In your app's webhook settings, you'll typically choose to add a new webhook connection. Paste the webhook URL you copied from Zapier, select any options that app offers—including which data you want to receive via the webhook—and save your changes.

The app that's connected to your Zapier webhook URL will send data to it whenever something new is added. To test a webhook trigger, you must first add something new to your app. For example, if you're connecting to an email marketing app such as MailChimp, you could add a new subscriber to Mailchimp.

Sending more than one event per webhook request

Webhook triggers can receive more than one event in a single webhook request. You can send an array of properly formed JSON objects, and Zapier will trigger the Zap once for each object in the array.

For example, if you POST this payload to a Webhook endpoint:

[
{
    "first_name": "Bryan",
    "last_name": "Helmig",
    "age": 27
},
{
    "first_name": "Mike",
    "last_name": "Knoop",
    "age": 28
},
{
    "first_name": "Wade",
    "last_name": "Foster",
    "age": 29
}
]

Zapier will trigger the actions three times, once for every object in the array.

• After the trigger is set up, click Continue.
• Click Test trigger.
• If your data sent to the webhook URL is found, the step will show it was successful as well as the data received.

Zapier will separate each field from your webhook data, which lets you use them (e.g. email addresses, names, project info) in later steps in your Zap.

If you have multiple webhooks you want to trigger from the same event in your app, you can combine their URLs into a single URL. For example, if you have three Zaps, the URLs would look like this:

https://hooks.zapier.com/hooks/catch/123456/zbB61

https://hooks.zapier.com/hooks/catch/123456/kzXC4

https://hooks.zapier.com/hooks/catch/123456/2Ajjn

You can take the last part of each URLs and combine them into a single URL like this:
https://zapier.com/hooks/catch/123456/zbB61,kzXC4,2Ajjn

Requests sent to this URL will trigger all three webhook URLs at once.