Yeah but without the cash balance in API it's not useful
First, see my comment above regarding this functionality coming soon. Second, you do not need to know the cash balance to submit an order through the API; if you submit an order and there is not sufficient funds - you get an INSUFFICIENT_CASH response. This is all in the API developer documentation from Lending Club...
It seems to me the cash balance would be needed, unless the API will allow a partial filling of an order when there is "insufficient cash."
For instance, if 15 notes pass my filters and an order is filed via the API, and I only have enough cash for 10 of them, will it buy 10 for me? If so, which 10? My highest priority ones? I have been under the impression that the cash balance was needed so that the third party site knows before placing my order that I have enough cash for 10 notes, then it can pick the first 10 that meet my highest priority filters and file the order. I guess an alternative would be to have the third party sites file orders for 1 note at a time until the cash is gone, but I would think that wouldn't be efficient for either the 3rd parties or for Lending Club.
I'm really happy to hear a new API is being tested and hope it is available for use soon. Lending Club needs to continue to push to get this out as it would make the risk to credential compromise moot. Lending Club should then implement some additional security....perhaps text message authentication or something similar if a customer logs in from an unfamiliar computer or tries to change e-mail address or bank account info. As of now, to change bank account info you would have to wait for and confirm small deposits, so it's not like someone could clear your account out all that quickly even if they had access to your credentials....but extra measures could be put in place to make it even more difficult.