Welcome to the Chainlink Documentation
Chainlink expands the capabilities of smart contracts by enabling access to real-world data and off-chain computation while maintaining the security and reliability guarantees inherent to blockchain technology.
New to Chainlink and Smart Contracts?
Learn the basics in the Getting Started Guide. Build your first smart contract on Ethereum.
Getting Started GuideSupported Blockchains
Chainlink gives smart contract developers the oracle infrastructure and tooling they need to build scalable and externally-connected dApps on several blockchains and layer-2 networks. Select a blockchain to get started.
Products
Chainlink offers several products on blockchains and layer-2 networks. Select a product to get started.
Data Feeds
Get data and asset prices in your Smart Contracts.
Verifiable Random Numbers (VRF)
Use Chainlink VRF to consume randomness in your smart contracts.
Call External APIs
Request & Receive data from any API using the Chainlink contract library.
Automate Contracts
Automate smart contract functions and maintenance using Chainlink Keepers.
Need to run your own Chainlink Node?
See the Node Operator's Guide to learn about starting and maintaining Chainlink Nodes.
Node Operator's Guide
