> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://krystal-dev.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Adding a WHMCS Payment Gateway

Payment Gateways allow you to receive payments and make refunds to your clients.

You will need to select a payment processor from the vast list that WHMCS support, which includes PayPal & Stripe.

[WHMCS have a guide containing further details and a video guide - external link opens in a new window](https://docs.whmcs.com/Payment_Gateways).

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