Decentralized Oracle
Also known as: Trustless Oracle, Distributed Data Oracle, Oracle Network
A data service that fetches and verifies external information for smart contracts using multiple independent sources.
A decentralized oracle is a blockchain-based service that supplies real-world data to smart contracts using a network of independent nodes. Unlike centralized oracles, which are single points of failure, decentralized oracles improve reliability and security by aggregating data from multiple sources and reaching consensus. They are essential for DeFi applications, gaming, insurance, and prediction markets. Popular decentralized oracle networks include Chainlink, API3, and Band Protocol. Oracles can provide price feeds, random numbers, weather data, and more—enabling smart contracts to interact with the outside world.