cAPI is compatible with the latest stable version of Joomla 3.9.x or higher. We recommend Joomla 3.9.24 (latest version). More info....
Included below is an example of popular / supported server configurations. We build our developement environments using the REMI and EPEL repos (REMI mainly for PHP 5.6.x / 7.2.x+ and MariaDB 5.5.x+).
RHEL 7 / CentOS 7.x (latest, stable) Fedora (working, limited testing) Ubuntu (working, limited testing)
Apache 2.2.x,2.4.x (latest, stable/patched) Nginx not officially supported yet
Minimum: PHP 7.0.x (latest, stable) Recommended: PHP 7.1.x (latest, stable) Note that this will depend on compatiblity of other Joomla extensions with PHP7.
cAPI v2 Minimum: PHP 7.2.x (latest, stable)
Minium: MySQL 5.5.x (latest, stable) Recommended: MariaDB (latest, stable)