This plugin has been closed as of August 7, 2019 and is not available for download. Reason: Security Issue.
working fine here... Wordpress 5.1
I recently installed the plugin and it seemed untrustworthy, that's why I just installed it and it works wonders. I hope the programmers give you an update as soon as possible and improve the plugin's appearance ... from the title and presentation image. Three years without update, I hope they do.
Best ever Wordpress JSON API plugin, unfortunately it's not updated since 2 years now. I recommend this plugin to everyone needing to use JSON on your blog