BlockCypher is a simple, mostly RESTful JSON API for interacting with blockchains, accessed over HTTP or HTTPS from the api.blockcypher.com domain. Currently, BlockCypher supports Bitcoin, Bitcoin Testnet3, Litecoin, Dogecoin, and BlockCypher’s Test Chain.
BlockCypher is Amazon Web Services for Bitcoin.
- 0-confirmation confidence factor
- Double spend notification
- Payment API with bridge to send from standard to multisig address
- Multisig API
- Best block chain notifications (webhooks) in the business
Investors include Tim Draper and Jerry Yang. More information on Angel.co