RP with only a claims aware app?

Hi,

We have an environment with ADFS setup. Now a 3th party has a web based application, dedicated for our use. But, that 3th party does not have any ADFS server in its own environment. Only the web based application which will soon be a claims aware application.

My question, is it possible to setup a sort of trust between us, and that 3th parties claims aware app?

I only clicked some screens in ADFS and was wondering what I should enter in the Relying trust metadata field for example. Have to enter a URL. But, aside of that, I am wondering what the answer is on my first question. Can somebody tell?

Thanks!