Hi, I'm not interested in various trading sites with the usual graphs as they usually go in much smaller timescales (weekly at best), I just want an easy peak into the monthly average price of Bitcoin historically, up to present.
Ideally for the last 30 days of rolling average, but I can also do with a monthly average. Is there any such site like that I've missed? Extra bonus points for a public API. Thanks.
Edit: I've only found this, but it's not completely satisfactory:
https://www.barchart.com/crypto/quotes/%5EBTCUSD/technical-analysis