Kastle Kastle.Providers.Bitcoin.BlockCypher by: Kastle .NET Core 2.0 3,533 total downloads last updated 7/21/2018 Latest version: 1.0.3 SDK for calling the BlockCypher bitcoin API. Kastle.Providers.Civic by: Kastle .NET Core 2.0 817 total downloads last updated 9/1/2018 Latest version: 0.0.1 SDK for interacting with Civic.