Once you have completed your development on our Sandbox environment you cannot automatically start using our production APIs.
For PSD2 APIs it is possible to get an account by using the PSD2 enrollment API if you are a certified AISP, PISP or CISP. Our Account Information, Payment Initiation and Confirmation Availability of Funds API are available in production.
For using non-PSD2 APIs in production, please refer to the overview page of the API you want to use to learn more about how to request access to production.