Is there an API call where I can get a full list of all the accounts?
As far as I have researched, there isn't in Tessitura REST API. You will have to pass in a "constituentId" as a query parameter, or "accountId" as subpath, if making a request to "/CRM/Accounts".
Yogi, do you know if the parameters take wildcard characters or is it only exact match?
It has to be an exact match, afaik.