Send a webhook

Send a webhook sends an HTTP POST request with custom data to an external URL. Use it to notify external systems, trigger Zapier Zaps, or push data to third-party APIs when events occur in your automations.

How it works

1. The automation reaches the Send a webhook step
2. The step sends an HTTP request to the URL you configured with the data you specified
3. The external system receives and processes the request
4. The automation continues to the next step

Set up the action

1. Open the automation builder and add a new step
2. Under Advanced, select Send a webhook
3. Configure the fields:

Field	Required	Description
Endpoint URL	Yes	The URL to send the request to. Must use HTTPS.
Method	Yes	The HTTP method. Options: POST, GET, PUT, DELETE.
JSON body	No	Key-value pairs sent as JSON in the request body.
Custom headers	No	Key-value pairs sent as HTTP headers.
Query parameters	No	Key-value pairs appended to the URL as query string parameters.

tip

Use Add dynamic content in any field to insert values from previous steps. All mapped values must be strings — passing integers causes a runtime error.

Outputs

After the step runs, two values are available to downstream steps:

Output	Description
endpoint_url	The URL the request was sent to.
curl_command	A cURL representation of the request that was made.

Tips

• Send data as JSON body, not headers — sending data as headers is the most common misconfiguration
• All values must be strings — if you're passing numbers from dynamic content, wrap them in a Format text step first
• File attachments are not supported — this action sends JSON data only
• HTTPS required — HTTP URLs are not accepted

Related resources

• Actions overview — Browse all available actions
• Format text — Transform values before sending
• Data expressions in automations — Extract and transform data between steps
• Logic & flow control — If/else branches, delays, and jump steps
• Creating and configuring automations — Build and configure workflows