Thanks for the mention (and contributing) Mathias.
A quick clarification: #1: our endpoint is "community" one. It's free and open for dev purposes, but it's not suggested for production use as one can easily self-host it (though we use same server for number of heavy traffic apps like Iframely for Gmail chrome ext).
#2: Iframely now has the oEmbed endpoint too. We trim much richer infos into oembed format for backwards compatibility.