send_contact_form_7_to_api.php

<?php

//send and display response data from an api or webhook

add_action('wpcf7_before_send_mail', 'send_to_api_webhook', 10, 3);
function send_to_api_webhook($contact_form, &$abort, $submission)
{

    // replace your-subject with your form field
    $get_input_user = $submission->get_posted_data('your-subject');

    // replace abc with your api key
    $the_key = 'abc';

    // replace xyz with your api , webhook url, ex:
    $url = 'xyz';

    // prepare body json to send, can add many as you want. Replace keyword with the object from your api provider documentation.
    $mybody = [
        'keyword' => $get_input_user
    ];
    // json_encode the body data
    $goodbody = wp_json_encode($mybody);

    // start to call, use POST or GET, depend on your project
    $response = wp_remote_post($url, array(
            'method' => 'POST',
            'timeout' => 45,
            'redirection' => 5,
            'blocking' => true,
            'headers' => array(

    // replace apikey with the object from your api provider documentation.
                'apikey' => $the_key,
                'content-type' => 'application/json'
            ),
            'body' => $goodbody
        )
    );
    // now get the response data
    $response_data = $response['body'];

    // jsondecode to get readable data
    $to_use = json_decode($response_data, true);

    // start get contact form 7 form properties
    $properties = $contact_form->get_properties();
    // display the response data form webhook, api, replae it with submit message of cf7. Replace point with with the object from your api provider documentation.
    $properties['messages']['mail_sent_ok'] = $to_use['point'];
    $contact_form->set_properties($properties);
}