Sometimes is parameter don't recognised by the API then it will be give the default response.

You need to provide some default argument to the API.

You can use your own custom rest route to the your site.

Sometimes you need authentication from the word wordpress like WP nouns and anothers. For POST request.

Wordpress rest API 2 support delete get post put.

In WordPress Codex you might get stuck.

@thomas answer is right Sometimes is parameter don't recognised by the API then it will be give the default response.

You need to provide some default argument to the API.

You can use your own custom rest route to the your site.

Sometimes you need authentication from the word wordpress like WP nouns and anothers. For POST request.

Wordpress rest API 2 support delete get post put.

In WordPress Codex you might get stuck.