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Overview Basic Request Model Decentralized Data Model Off-Chain Reporting Ethereum Proof-of-Stake Merge
DATA FEEDS Introduction to Data Feeds Data Feeds API Reference Historical Price Data Feed Registry API Reference Using ENS with Data Feeds Ethereum Data Feeds BNB Chain Data Feeds Polygon (Matic) Data Feeds Gnosis Chain (xDai) Data Feeds HECO Chain Data Feeds Avalanche Data Feeds Fantom Data Feeds Arbitrum Data Feeds Harmony Data Feeds Optimism Data Feeds Moonriver Data Feeds Moonbeam Data Feeds Metis Data Feeds Klaytn Data Feeds L2 Sequencer Uptime Feeds
USING RANDOMNESS Introduction to Chainlink VRF Get a Random Number Programmatic Subscription Subscription Manager UI Security Considerations Best Practices Supported Networks Migrating to VRF v2
Connect to any API Introduction to Using Any API Single Word Response Multi-Variable Responses Array Response Large Responses Existing Job Request Find Existing Jobs Testnet Oracles Data Provider Nodes API Reference
AUTOMATE CONTRACTS Introduction to Chainlink Keepers Time-based Automation Custom Logic Automation Create Keepers-compatible Contracts Manage your Upkeeps Creating Flexible Upkeeps EthBalanceMonitor Keepers Architecture Supported Networks Keepers Economics Keepers Release Notes FAQs
Resources Videos and Tutorials Acquire testnet LINK Fund Your Contracts Install Frameworks LINK Token Contracts Developer Communications Getting Help Selecting Data Feeds Hackathon Resources Contributing to Chainlink

Chainlink on EVM (Ethereum) Chains

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Chainlink turns your smart contracts into hybrid smart contracts, giving them access to real-world data and services while maintaining the security and reliability guarantees inherent to blockchain technology.

Ethereum Merge

The Ethereum Merge is coming soon. See the Ethereum Proof-of-Stake Merge page to learn how Chainlink is supporting the Ethereum Merge.

Ethereum Proof-of-Stake Merge Overview

Get Data Feeds in your Smart Contracts

Retrieve the latest prices and data points of assets in your smart contracts.

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Generate Verifiable Random Numbers (VRF)

Use Chainlink VRF to consume randomness in your smart contracts.

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Call External APIs from Smart Contracts

Request & Receive data from any API using the Chainlink contract library.

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New to Chainlink and Smart Contracts?

Learn the basics in the Getting Started Guide. Build your first smart contract on Ethereum.

Getting Started Guide

Automate and Maintain with Chainlink Keepers

Chainlink Keepers provide smart contract developers, decentralized applications (dApps), and decentralized autonomous organizations (DAOs) with a highly reliable, decentralized, and cost-efficient method of automating smart contract functions and regular contract maintenance.

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