Image tagging which endpoint

[AmandaCifuentes]

Which http endpoint can I use to add tags to an image?

[Greg-DB · Accepted solution]

The Dropbox API offers custom "file properties" functionality you can use to programmatically add your own metadata to files of any type:

https://www.dropbox.com/developers/documentation/http/documentation#file_properties

Note that this isn't specific to images and is only accessible to the API app itself.