cAPI is compatible with the latest stable version of Joomla 3.4.x or higher. We recommend Joomla 3.6.5 (latest version).
Included below is an example of a popular and support server configuration. We build our developement environments using the REMI and EPEL repos (REMI mainly for PHP 5.6.x / 7.1.x and MySQL 5.5.x).
RHEL / CentOS 6.x, 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 (on the roadmap)
Minimum: PHP 5.5.x (latest, stable) Recommended: PHP 7.0.x (latest, stable) Note that this will depend on compatiblity of other Joomla extensions with PHP7.
Minium: MySQL 5.5.x (latest, stable) Also supports latest stable MariaDB.