This module will expose some services which you can use to connect to a json_api standardized api.
Include the following packagist to your repository.
{
"type": "composer",
"url": "https://packagist.synetic.nl"
}
Use composer to require this module.
composer require drupal/json_api_client
Inject the drupal.synetic.json_api_client.client into your class or service.