The API is an open source multi ledger API, that allows developers to build multi-blockchain and multi-ledger solutions on 26+ blockchains. You can retrieve information, such as balances, transaction history, address validation. Also, the library allows you to sign transactions client-side.
This is an official API
Offers SSL Support
Requires No Keys needed/Deterministic Encryption
Request format: GET/POST requests
Response format: JSON; Binary; Capable of serving HTML pages