WHMCS FastSpring Payment Gateway
# WHMCS FastSpring Payment Gateway
Payment Gateway modules allow you to integrate payment solutions with the WHMCS platform.
# FastSpring Payment Module for WHMCS
First Setup WHMCS software. then go to Root directory whmcs_root-> /modules/gateways/ upload the php file: fastspring.php and fastspirng folder. whmcs_root-> /modules/gateways/callback upload the php file: fastspring.php
Begin by activating the payment gateway under Setup > Payments > Payment Gateways and choose FastSpring from the Available Gateways tabs.
Here you need Fastspring api, popup storebuder url