run-action-api-request.php

<?php
/**
* Callback function for Caldera Forms Run Action to send to a remote API
* 
* SEE: https://calderaforms.com/downloads/caldera-forms-run-action/
*/
add_filter( 'my_run_action', 'my_run_action_callback' );
function my_run_action_callback( $data ) {
    //Create request body
    $request_data = array(
        //Add each part of array here
        'MODULE' => $data[ 'module' ],
        'EMAIL' => $data[ 'email' ]
    );

    //Send request - SEE: https://developer.wordpress.org/reference/functions/wp_remote_post/
    //IMPORTANT change URL to your API URL
    $r = wp_remote_post( 'https://google.com',
        array(
            //You might need to json_encode this and set the content-type, check the API docsss
            'body' => $request_data
        )
    );

    //Request failed without response
    if( is_wp_error( $r ) ){
        //Cause form submission to fail with the WP_Error message displayed
        return array(
            'type' => 'error',
            'message' => $r->get_error_message()
        );
    }

    //Request failed with response
    //IMPORTANT: Check your API docs for what status code(s) indicate sucess
    if( 201 !== wp_remote_retrieve_response_code( $r ) ){
        //Cause form submission to fail with some message display
        return array(
            'type' => 'error',
            //Your API response might have errors, use $body = wp_remote_retrieve_body($r) to read request body
            'message' => 'Failed with code ' . wp_remote_retrieve_response_code( $r )
        );
    }

    //Don't return anything because it worked!
    //Returning in a pre-process callback causes form submission to stop
}