I was looking to develop a site on Pinterest. Wanted to know if an API exists. What I've found is a unofficial API, but never sure if that works. Do you have any updates on this?
No. See the official word at https://support.pinterest.com/entries/21151603-i-m-a-developer-does-pinterest-have-a-public-api and sign up to be notified as soon as (and if) a public API is released.