Now finally an ability to upload attachments via API !!!

That’s been there since late 2024, but yes, it is very exciting! Airtable never publicly announced it, so it was added very quietly behind-the-scenes.

The key difference between this and the update record command is that this one will APPEND ATTACHMENTS into the attachment field instead of overwriting the attachment field.

- ScottWorld, Expert Airtable Consultant 

Yes. it is great. And it seems to have a limit on file size. 5MB tops from what I know.
workaround is to upload files to a self hosted server using something like Picoshare and then using the same URL based method as before.