I see that recently the API returns fields with the identifiers in nomisma.org of the rulers. The link to the rulers' pages has also been added to their pages.
I don't find that the change has been reported on the forum. Members who use the API need to be informed of changes to it.
The other fields, which I have been asking to be added to the API since two years, are still pending:
mintmarks, letter and picture link
size, second dimension in coins and exonumia
other marks