The beta version page is on Bitcoin API Free.

This is the provisional website of bitcoin-data.com, a website where Bitcoin data will be made available for free through a REST API, it will be mostly On Chain metrics of the Bitcoin Blockchain.
Metrics On-Chain
With the free bitcoin API you can easily access the most relevant BTC On-Chain metrics extracted from the Bitcoin blockchain offering information on the current price of Bitcoin, market trends, transaction volumes and much more.