Global payments company Mastercard has announced that it will be opening up its internal blockchain API to developers. According to the company, the API, which is focused on B2B transactions, "Mastercard’s blockchain solution provides a new way for consumers, businesses and banks to transact."
CapLinked, a provider of secure virtual data rooms and document sharing for enterprises, has announced TransitNet, "an open and unified blockchain framework for protecting digital assets and permanently recording data access during enterprise transactions", along with a protocol API.
Microsoft has released a development kit for blockchain. The initial release extends the features of its Azure Blockchain Workbench and blockchain developer templates. It focuses on connecting interfaces, integrating data and systems, and deploying smart contracts and blockchain networks.