How to Hit External REST POST API in WordPress? [closed]

WordPress has several functions for sending requests via PHP, including wp_remote_post(), which you can use to send a POST request to an API. Then you can use wp_remote_retrieve_body() to handle the response. It would look something like:

$response = wp_remote_post( 'http://example.org/api' );
$api_response = json_decode( wp_remote_retrieve_body( $response ), true );

If you need to interact with the API via JavaScript, then WordPress doesn’t get involved, and you would do it the same way you’d do it any any JavaScript application.