Chainlink is a decentralized oracle network that connects smart contracts with real-world data, solving one of the biggest limitations of blockchain technology — the inability to access off-chain information in a secure, trustless way. With Chainlink, smart contracts can interact with external data sources such as price feeds, weather updates, sports results, payment systems, and much more.
Founded in 2017 by the company SmartContract, Chainlink has become a core infrastructure layer for the Web3 ecosystem. It supports multiple blockchains including Ethereum, BNB Chain, Avalanche, Polygon, and others. Chainlink operates through a network of independent node operators — oracles — that deliver accurate and tamper-proof data to smart contracts.
One of its flagship products is Chainlink Data Feeds, which provide aggregated and verified data widely used in DeFi protocols. These feeds ensure that lending platforms, stablecoins, and other decentralized applications receive up-to-date and reliable information. Another key feature is Chainlink VRF (Verifiable Random Function) — a secure way to generate random numbers on-chain, used in blockchain gaming, NFT drops, and lotteries.
Chainlink is also leading the development of CCIP (Cross-Chain Interoperability Protocol) — a groundbreaking solution that enables communication between different blockchain networks. This protocol allows developers to build cross-chain applications that can transfer data and assets seamlessly across chains.
Trusted by major enterprises like Google Cloud, SWIFT, and Oracle, Chainlink is widely regarded as the industry standard for secure oracle services. Its decentralized architecture, robust security model, and expanding ecosystem make it a foundational layer of the blockchain economy.
