\Magento\Framework\HTTP\ZendClient
- How does the Authorizenet module request the payment gateway
- How does the DHL module request the carrier API
- How does the Magento 2 OAuth server request a consumer
- How does the PayPal module request the PayPal Payflow API
- How does the USPS module request the carrier API
- How does the backend currency rates import work
- How does Magento 2 request the New Relic API
\Magento\Framework\HTTP\Adapter\Curl
- How does the backend check a web accessibility of the app/etc/config.php
- How does the backend request the official notification feed
- How does the Marketplace module retrieves the Magento partners list
- How does the PayPal module request the PayPal NVP API
- How does the ProductVideo module load a video preview image from YouTube or Vimeo
The plain \Zend_Http_Client
How does the UPS module request the carrier API