Chainlink Developers

Welcome to the Chainlink documentation site. You'll find comprehensive guides and documentation to help you start working with Chainlink as quickly as possible, as well as support if you get stuck. Click here for an introductory walkthrough on how to create a Chainlink request on the Ropsten test network!

Building on Chainlink? Click here to get started!

Get Started

Getting Started

Build a Smart Contract with Chainlink

Build a smart contract connected to off-chain data sources using Chainlink oracles

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Explore Price Reference Data Contracts for DeFi

Learn how to use pre-built on-chain reference contracts to secure your DeFi smart contracts

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Learn with an Example Walkthrough

Follow a complete example executing a project connected to Chainlink from start to finish

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Request & Receive Data

Chainlink can provide your smart contract with access to any external APIs

Create a Request

Pre-built Chainlinks

Explore our collection of pre-made Chainlinks which easily connects your smart contract to specific APIs

Testnet Mainnet

Discover Chainlinks

Find everything you need to build your connected smart contracts on the world's first oracle market

Chainlink Market ↗

Still have questions?

Find answers to our most commonly asked questions.

Updated 3 days ago

Getting Started

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