Bulk by list

You can’t exactly just give a list of URLs, partially because your images aren’t stored by URL.
But you CAN pick and choose which images you’d like to process: https://docs.ewww.io/article/62-power-user-options-in-list-mode

Maybe there is a WP-CLI method? I parsed problem images from Google insight. That list is huge – near 5k pics, but number on server is over 100k. So I just don’t want waste credits for normal images.

We do have this, but it still doesn’t really let you do (ONLY) specific images: https://docs.ewww.io/article/25-optimizing-with-wp-cli

That said, if you know how to code in PHP, you could write yourself a little function that would use the ewww_image_optimizer( $filename ) function to process each of those images.
Of course, you’d have to convert the urls into the actual filesystem paths first…

I do have one other idea that’s a bit of a different take on the problem, but you’d have to hit me up at https://ewww.io/contact-us/ as we’re getting into discussion about paid services which isn’t permitted on the forums.