[wsetchell]

I would think of this like a normal customer development / lean startup problem.

Is there anyone other than your company using this API? If not, it might make sense to find a single "customer" and make sure the API solves tons of problems for them. If you cannot get first adopter, iterate on the product/API until you can create something that a customer loves.

It sounds like people don't see strong enough value in being the early adopters of these APIs. You might need to iterate on API/product until they do.