WordPress Plugin for API Endpoints?

I need to generate, customize or manage API endpoints of certain features in my Wordpress website. My mobile app developer wants to use these endpoints to call API and make the app interact with my website without having to create a separate database.

Example of API endpoints I need:

1. Register user
2. Login user
3. Product categories
4. Post categories
5. Specific pages
6. Specific posts
7. All pages
8. All posts
9. Specific Payment processors active on the website WooCommerce for app users to pay with such payment processors.

Which plugin can I use to generate ir customize API Endpoints for this purpose?

Guys please help

If you really want to get help a bit faster you may need to find another section for this question.
Perhaps such plugin does not exist and you will have to hire someone to get that done and have it working in the way you need.

WordPress has a rest API and plugin.