Setup Callback URL

Before commencing with the integration of the VASP API and GTR APIs, you are required to configure your callback URL which will be used for receiving incoming verifications.

Here's how to configure your callback URL:

1. Log into the GTR Website and go to [My Account] > [Settings].
2. Find and open the [Callback URL] tab on this page.
3. Enter your callback URL in the designated field and save the changes.

callbackUrl is your server URL that will accept callback requests from the GTR server, which can use the HTTP protocol. However, using the HTTPS protocol is recommended. We will show you the callback server implementation inside each solution and discuss it in the

Callback Server Implementation section. For now, just use your company domain URL that you will use later. (localhost or IP is not acceptable).

During the development stage, you can utilize the following services to facilitate quick testing with our integration test service:

• https://smee.io/
• https://ngrok.io
• https://github.com/fatedier/frp
• https://www.shuttle.rs/
• https://www.heroku.com/

Please be aware that GTR will send the mTLS Client Certificate during callbacks. While pure HTTP without TLS is acceptable, it also means that you may not be able to test the functionality of mTLS.