This Recommendation introduces a service exposure for decentralized services (DSE) for Internet of things (IoT) applications and specifies its common characteristics, general requirements, reference architecture and common capabilities. A DSE is a functional entity for IoT applications in an IoT device, which integrates multiple decentralized services (such as services based on distributed ledger technologies) and exposes uniform interfaces to IoT applications. Those integrated decentralized services may support the same or different types of decentralization solutions. IoT applications can use uniform interfaces to integrate and access multiple decentralized services at the same time, regardless of their decentralization solutions. A DSE can bring efficiencies and benefits to application providers and users.