Memcache :
Memcached is an easy-to-use, high-performance, in-memory data store. This is a tool to make web applications faster and more efficient by caching frequently accessed data in memory.
To enable API caching with Memcache,
Step 1: Log in to the ImprintNext Admin with your admin credentials.
Step 2: On the navigation menu, go to Global settings > integration and click the Set up button in the Memcache icon. 
Step 3: The Memcache setting page will appear. Fill in the necessary credentials for your server and click on the save Button.
MEMCACHE HOST: By default local host is set here or the host where memcache is installed.
MEMCACHE PORT: The port number.
You can enable and disable the settings by clicking the Enable API data caching with Memcache.
You have successfully enabled Memcache settings.