Create account or login on https://app.plasmapay.com
Pass KYC verification on https://app.plasmapay.com/id/profile/identification
Go to business dashboard on https://app.plasmapay.com/business
Create your first crypto checkout app
Then you can use server-to-server integration using provided API KEY. Go to API Reference Docs.
Invoices are statements of amounts owed by a customer, and are either generated one-off.
They contain invoice items, and proration adjustments that may be caused by subscription upgrades/downgrades (if necessary).
Note that finalizing the invoice, when automatic, does not happen immediately as the invoice is created. PlasmaPay would sent a webhook after success invoice payment. If you (and the platforms you may have connected to) have no webhooks configured, PlasmaPay provides an API that can be called to figure out invoice status.
PlasmaPay applies any customer credit on the account before determining the amount due for the invoice (i.e., the amount that will be actually charged). If the success message was receved you should send this `API_KEY` for all your request to the server. Using an request without `API_KEY` will return an error.