You can point your API calls to two endpoints (base URLs). “Stage” if you are testing, and “Production” if you finish testing on “Stage” and want your application to go live.
UI URLs are used for OAuth2 Authorization, while API URLs are used in all other cases. UI URLs use cookie and session information, while API URLs do not.
The URLs are:
Stage API: https://stage.wepayapi.com/v2/ Stage UI: https://stage.wepay.com/v2/ Production API: https://wepayapi.com/v2/ Production UI: https://www.wepay.com/v2/