API to add and read attachments?

API to add and read attachments?

I'm writing an application that works with Zoho CRM. I'd like to be able to query for the attachments on a Potential, and then be able to query for the attachment files to get at the bytes of the files. I'd also like add attachments to a Potential via the API.  Is this possible?

I believe such a call to query attachments would be something like:

https://crm.zoho.com/crm/private/xml/ Attachments/getRelatedRecords?newFormat=1&apikey=<my api key>&ticket=<my ticket>&parentModule=Potentials&id=<my potential id>

as this works for other related records, such as Cases.

Is this already possible? If not, is it coming in the future?