# Technical documentation

This chapter provides technical information about the methods created for External application.

<p class="callout info">**Info:** The authentication in our system is handled through the mTLS. To get a certificate please visit [Connecting to server-t... | Verestro Developer Zone](https://developer.verestro.com/books/connecting-to-our-services-and-sandbox/page/connecting-to-server-to-server-apis-fe-sandbox)</p>

**[You can find API documentation below using this link](https://payout-to-xpay.verestro.dev/api-docs/).**