How to get count of all documents in account?

There is no way to get a count or a list of all agreements sent by all users in the account from a single API call.  You would need to make the call as each user in the account (x-api-user = user1@domain.com, x-api-user = user2@domain.com ...)  In the API, as in the web UI, you can't access agreements as multiple users at the same time.

A.

Hello,

If your "documents" means "agreements", you might use "/search" to get total hits.

https://secure.na1.adobesign.com/public/docs/restapi/v6#!/search/searchResources