This is a free REST service like JSONPlaceholder, but here you can CRUD your own data.
To CRUD your own posts and comments you need to create a user then send HTTP requests with Api-Token of this user.
If you find anything wrong in this documentation or anything need to improve please send me an email sourovfci@gmail.com
https://api.sourov.im/comments
Documentation for this api can be found on the here.