The Zeplin Public API Developer Hub

Welcome to the Zeplin Public API developer hub. You'll find comprehensive guides and documentation to help you start working with Zeplin Public API as quickly as possible, as well as support if you get stuck. Let's jump right in!

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Securing Webhook Requests

You probably want to protect your webhook against malicious behaviors such as man-in-the-middle and replay attacks. Making sure that events originate from Zeplin, and your webhook receives them almost immediately is a good start.

You can verify that a request has originated from Zeplin following the steps below:

  1. Verify the request has a valid signature (Zeplin-Signature header)
  2. Ensure the request is not too old (Zeplin-Delivery-Timestamp header)

Verifying a signature

Zeplin signs the webhook events using the secret of your webhook and includes the signature in each request (Zeplin-Signature header). The signature is hex digest of a hash computed using HMAC with SHA-256.

The signed payload is obtained by concatenating delivery timestamp (Zeplin-Delivery-Timestamp header), '.' character, and the JSON payload sent in the request body.

The following code snippets show how to generate from the payload:

const crypto = require("crypto");

const secret = "...";
const request = {
  headers: {},
  body: {}
};

const timestamp = request.headers["zeplin-delivery-timestamp"];
const requestBody = request.body;
const signedPayload = `${timestamp}.${requestBody}`;

const hmac = crypto.createHmac("sha256", secret);
hmac.update(signedPayload)

const signature = hmac.digest("hex");

Ensuring valid timestamp

Make sure that you receive the payload within a particular time window (e.g., 5 minutes) after Zeplin sends it. To determine this, you can safely compare the delivery timestamp (Zeplin-Delivery-Timestamp header) with the current timestamp.

Whitelisting IP addresses

All webhook requests will originate from the following IP address:
44.233.154.151

Updated 2 months ago


Securing Webhook Requests


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