It sounds like your best market to pitch to would be startups. And if that's the case, it's a tough sell since they're usually very financially conservative, and they want things that will directly lead them to profit. Simple to use APIs is nice, but I don't know if it's a must-have for startup developers. Most of them want to quickly ship something to market.

If you're targeting the enterprise, keep in mind that developers who code for big companies aren't the ones making the buying decisions. If it's not free or open source, most will not have the initiative to pitch to upper management (they just want to get the least done in the least amt of time so they can go home to their families, and watch TV)