git annex readpresentkey key uuid
This plumbing-level command reads git-annex's records about whether the specified key's content is present in the remote with the specified uuid.
It exits 0 if the key is recorded to be present and 1 if not.
Note that this does not do an active check to verify if the key is present. To do such a check, use git-annex-checkpresentkey(1)
Joey Hess <firstname.lastname@example.org>