You can find a detailed description of the REST interface for Paysafecash here:
You can find the Paysafecash Integration Guidelines here.
You can find the short descriptive texts for the various types of Paysafecash payments, which you can use for your customer (different languages available) here.
You can download the Paysafecash logo here.
If you would like to integrate Paysafecash via a verified plug-in, you will find here the installation file for the Shop system WooCommerce or PrestaShop.
PrestaShop 1.6.X - 1.7.6