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Universally connected smart contracts

Chainlink connects smart contracts on any blockchain to data providers, web APIs, enterprise systems, cloud services, IoT devices, payment systems, other blockchains, and much more.

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Connect your smart contract to real world data

Smart contracts are inherently disconnected

Blockchains are highly secure and reliable networks for value exchange but lack the functionality to natively fetch external data or send data to off-chain systems in a manner that retains end-to-end tamper-resistance.

Chainlink connects smart contracts to the real world

Through the use of secure oracles, Chainlink extends the functionality of blockchains by connecting smart contracts to real-world data, events, payments, and more in a highly tamper-resistant and reliable manner.

Secure oracle networks for any smart contract

End-to-end decentralization

Use decentralized oracle networks made up of independent and Sybil-resistant nodes for high availability and manipulation resistance.

Provably secure nodes

Provide cryptographic proof of the oracle networks' overall security as every piece of data is digitally signed by nodes and stored on-chain.

High-quality data

Access any password-protected or authenticated API data source, redundantly validated by multiple nodes to prevent any single points of failure.

Crypto-economic security

Leverage binding service agreements outlining the terms of an oracle service with financial penalties for poor results.

Defense in depth

Apply multiple layers of security such as cryptographic signatures, trusted execution environments, zero-knowledge proofs, and more.

Open-source community

Improve network security and accelerate development through ongoing contributions from node operators, developers, researchers, security auditors, and more.

Blockchain agnostic

Connect to all leading public and private blockchain environments from a single framework, providing a universal abstraction level for cross-network connectivity.

The most trusted oracle network in DeFi

Chainlink Price Feeds provide critical market data needed to issue, settle, and secure DeFi applications

The Chainlink Network supports a multitude of price feeds live in production, securing billions in value for many leading DeFi applications, CeFi companies, and various other financial institutions.

A leading source of on-chain randomness

Chainlink VRF generates reliable randomness used to mint NFTs, distribute random rewards, and power unpredictable gameplay scenarios

Chainlink Verifiable Random Function (VRF) provides numerous blockchain games with a cryptographically secure and provably fair source of on-chain randomness (RNG), giving users a strong guarantee of application impartiality.

Connect your smart contract to all real-world data and events

Chainlink External Adapters allow developers to connect their smart contracts to any off-chain data resource or service

Chainlink’s ability to connect with any API opens up a wide variety of use cases, such as Arbol using Chainlink for weather data to create weather risk products and Theta Network leveraging Chainlink for viewership data to fight ad fraud for online content.

Easy blockchain adoption for enterprises

Chainlink provides enterprises and governments with numerous ways to leverage the benefits of blockchain technology without rearchitecting their current systems.

Secure your existing systems

Automate the backend of business processes to remove counterparty risk and reduce dependencies on third parties.

Increase transparency for users

Incorporate decentralized data inputs to provide your users with superior guarantees about the execution of key services.

Connect to any blockchain

Use a single software to connect your existing systems to any current or future blockchain environment.

Monetize your current APIs

Sell your data and API services directly to smart contract applications to expand your addressable market.

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A comprehensive set of resources to empower developers

Seamless integration

Implement Chainlink into your existing tech stack with minimal effort and time.

Simple documentation

Up-to-date documentation and guides, simplifying the developer experience and minimizing friction.

Dedicated support

Our support channels are available around the clock to provide you with a path to answers, whenever needed.

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