This section will walk through the steps needed to set up Zapier webhook to receive updates from Determined.

The steps to set up Zapier webhook are:

  1. Creating a Zap with Webhook

  2. Setting up the Webhook in Determined

  3. Testing the Webhook

  4. Verifing the Signature

  5. Configuring Destination

Creating a Zap with Webhook#

First, you need to create a Zap with webhook. Visit Zapier, signup if you haven’t already, and click on the Create Zap button.

Select Webhooks by Zapier as trigger Catch Raw Hook as event. Using Catch Raw Hook intead of Catch Hook because headers are needed to verify each webhook request.


You need to upgrade to premium account to access Webhooks by Zapier

Zapier Webhooks page displaying Catch Raw Hook event selected

Setting up the Webhook in Determined#

Then, you need to create a webhook in Determined using the Webhook URL from Zapier.

This is where your webhook URL displays in Zapier

Navigate to /det/webhooks or click on the “Webhooks” item in navigation side menu, then click the New Webhook button in the top right corner of the page.

Webhooks page displaying New Webhook fields including triggers.

Paste the Webhook URL that was copied from Zapier in the URL field. Select Default for the webhook type and then select the triggers that you want to receive notifications for. Finally, select Create Webhook and your webhook will be created.

Testing the Webhook#

To send a test payload, click on the triple dots on the right of webhook record and click on Test Webhook.

Webhooks page displaying where to find the Test Webhook action.

Then navigate back to Zapier and click on Test Trigger, then you should be able to see the test request.

Zapier Webhooks request page showing that your request was found.

Verifing the Signature#

Refer to Security and Signed Payload for the details behind verifing signature.

In Zapier, you can use Code by Zapier to compute signature based on payload and timestamp, then compare it with the signature in the request to verify each request.

Add a new action and choose Code by Zapier, select Run Python as an example.

Code by Zapier action with a Run Python event

Construct input data as following:

  • webhook_signing_key: match the webhook_signing_key in Determined.

  • timestamp: X-Determined-AI-Signature-Timestamp from request header.

  • signature: X-Determined-AI-Signature from request header.

  • payload: raw body of request.

Code by Zapier showing set up action input data like webhook_signing_key

Input code as following:

import hmac, hashlib, json

signing_key = input_data['webhook_signing_key']
timestamp = input_data['timestamp']
signature = input_data['signature']
payload = json.loads(input_data['payload'])

calculated_signature =, f"{timestamp},{payload}".encode(), digestmod=hashlib.sha256).hexdigest()

if calculated_signature == signature:
    return {"result": "PASS", "payload": payload}
return {"result": "Signature cannot be verified, request might not be legit"}

Under Test Action, test the code above, you should be able to see that verification has passed.

Code by Zapier showing that a Run Python event was sent

Configuring Destination#

Finally, you can configure where to proceed under each scenario by adding more actions. For example, send out an alert when verification fails, or send out an email with experiment information when verification pass.