[oacgnol]

I think they just mean that it's supposed to be an easy, versatile API for photo integration into whatever web app you're working on, like how Twilio is an API for phone integration.

[Barnabas]

You know that product {X} has arrived when it's assumed to be so mainstream that is's being used to describe functionality {Y} in sentences like "it's like {X} for {Y}".

[switz]

There used to be a great site: http://nowthatswhaticallstartups.com/ but it appears to be down now unfortunately.