Authentication Header
Authorization: {your_credentials}
Replace {your_credentials} with your base64-encoded Basic Auth username and password given to you by your Implementation Manager.
You must use the Authorization header for any request you send to our Token API, unless you are using client certificate authenticating with SSL/TLS.
Accept Header
Accept: application/vnd.worldpay.tokens-v3.hal+json
We use the Accept header to identify which version of our API you are using. You must use the Accept header for any request you send to our Account APIs.
DNS Whitelisting
Whitelist the following URLs:
https://try.access.worldpay.com/https://access.worldpay.com/
Please ensure you use DNS whitelisting, not explicit IP whitelisting. When you make a request within Access Worldpay, you should always cache the response returned.