Ask HN: What APIs do you wish existed?

A comparison API. So for example I could enter '12345' and a unit, and it could return an interesting fact like 'That distance is like climbing Mount Everest twice!'

Looks like similar version is already there. http://numbersapi.com/42

PPP [0] - I wrote my own little node package around it [1], but it was tough to find a proper API(s) to retrieve and aggregate all the data.

- [0] https://en.wikipedia.org/wiki/Purchasing_power_parity

- [1] https://github.com/rwieruch/purchasing-power-parity

That's a pretty interesting one, nice work!

I don't care about just APIs, I want libraries and services.

IRC api over all networks (access to the channel list for example).