Localhost websites cannot be used as complete_checkout_url

I am trying use a localhost website as a complete checkout url in my sanbox testing, however, I am getting a 403 error. See below

i’m still getting the error
{“amount”:100,“country”:“CO”,“currency”:“COP”,“complete_checkout_url”:“http://localhost:5000/api/rapyd/checkout",“error_payment_url”:"http://localhost:5000/api/rapyd/checkout”}
error: null
statusCode: 403
body:

403 Forbidden

403 Forbidden

For testing in the sandbox, you can use any live URL that you can find on the Internet. If localhost isn’t working for you, don’t waste any time on it. Use the URL for the last thing you bought online! :wink: