How to Build a Webhook Integration in Zapier
Build custom webhook integrations in Zapier. Send and receive webhooks to connect any app or API to your automation workflows.
Step-by-step
How to Build a Webhook Integration in Zapier
Set up a webhook trigger (Catch Hook)
Create a new Zap and select 'Webhooks by Zapier' as the trigger app. Choose 'Catch Hook' as the event. Zapier generates a unique webhook URL. Copy this URL — you'll paste it into the app or service that will send data to Zapier.
Send a test payload
Configure the source app to send a POST request to your Zapier webhook URL. Send a test event (e.g., submit a form, trigger a test notification). Return to Zapier and click 'Test trigger' — it will pick up the payload and show you the data fields.
Map webhook data to action fields
Add your action step (e.g., create a Google Sheets row, send a Slack message). In the field mapping, you'll see all the fields from the webhook payload. Map each field to the appropriate action field. Nested JSON objects are flattened automatically.
Use a webhook action (Send Hook) for outgoing requests
To send data out of Zapier via webhook, add 'Webhooks by Zapier' as an action step and choose 'POST'. Enter the destination URL, set the payload type (JSON or form), and map the data fields from previous steps.
Tips
Pro tips
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Save your Zapier webhook URL securely — if you regenerate it, you'll need to update every service that sends data to it
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Use the 'Catch Raw Hook' variant if you need to process the raw request body instead of parsed JSON
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Add error handling: send yourself a Slack alert if the webhook receives unexpected data (use a Filter to check for required fields)
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For security, add a secret token as a query parameter to your webhook URL and validate it with a Filter step
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