ShortPixel Image Optimizer

The built-in ShortPixel compatibility syncs images optimised by ShortPixel Image Optimizer with Google Cloud Storage. ShortPixel can read the image from its bucket URL, so nothing has to be downloaded to the server first. Object URLs are passed to ShortPixel in the {bucket}.storage.googleapis.com form so requests are not all counted against one domain; set WP_STATELESS_MEDIA_SHORTPIXEL_DISABLE_SUBDOMAIN_LINK to true to keep the default form.

Enable it on the Compatibility tab of the WP-Stateless settings page, or with the WP_STATELESS_COMPATIBILITY_SHORTPIXEL constant. It is not supported in Stateless mode.

Tested with ShortPixel Image Optimizer 5.5.2.