Honestly speaking, I think you might have a bit of a chicken and egg problem with getting started. I like the idea of your app and it's something I could use,

Honestly speaking, I think you might have a bit of a chicken and egg problem with getting started. I like the idea of your app and it's something I could use, but since you're asking your customers to hard code stuff into their application at potentially experience-critical moments, any kind of failure on your part would be pretty disastrous. This service is something I would use when it matures a little, it's not something I would hook my app into whilst you're just starting out. Venture backing or an established partner might help me convert sooner. My 2c.