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Developers Docs Start building your universally connected smart contract Developer resources Tools, tutorials, and technical support Developer Experts Chainlink’s most active and supportive technical community members Solutions Overview Chainlink provides a full suite of decentralized services for smart contracts Decentralized Market Data Decentralized oracle networks powering price feeds Verifiable Randomness Provably fair randomness for blockchain gaming apps Keepers & Compute Low-cost, verifiable off-chain computation for dApps Cross-Chain Bridging Universal interface for secure cross-chain applications Enterprise Solutions Secure middleware for connecting to any blockchain Ecosystem Ecosystem Overview The Chainlink Network is composed of data providers, node operators, and more Data Providers Sell your existing data and APIs on any blockchain Community Community overview Chainlink is developed by a global community Grant program Support for community development and research Events Upcoming hackathons, meetups, demos, and more Blog Start building en ZH KO Menu Start building Chainlink Labs is hiring. Come join an industry-leading team.

The Chainlink Virtual Hackathon is underway! Sign up today to compete for $125k+ in prizes. NEW Chainlink Keepers is now live on mainnet. Learn more SmartCon is LIVE right now. Discover 200+ leading DeFi, NFT, and blockchain projects. Sign up today Chainlink Labs is hiring. Come join an industry-leading team. See current openings

Connect your smart contract to the outside world

Chainlink's decentralized oracle network provides reliable, tamper-proof inputs and outputs for complex smart contracts on any blockchain. Develop with Chainlink Explore solutions Questions?

Start building your universally
connected smart contract

Price Feeds Randomness Any API Integrate price feeds Integrate verifiable randomness Access any external data

Highly secure and flexible infrastructure

Reliable, tamper-proof network

Use decentralization, trusted nodes, premium data, and cryptographic proofs to connect highly accurate and available data/APIs to any smart contract.

Seamless connection to any API

Build on a flexible framework that can retrieve data from any API, connect with your existing systems, and integrate with any blockchain, now and in the future.

Proven, time-tested solutions

Integrate battle-hardened and time-tested oracle solutions that secure billions of dollars in value for market-leading blockchain projects.

Transparent oracle computation

Independently monitor and verify Chainlink’s open-source code, the performance of its oracle networks, and the quality of individual node operators. Deploy your Chainlink smart contract

What is Chainlink?

The industry standard oracle network

Chainlink greatly 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.

Watch a video explaining why Chainlink is the industry standard oracle network.

Powering the future of smart contracts

“Part of composability is that you don’t have to build everything by yourself. Chainlink’s oracle is very good, and it’s part of this whole composability idea, it’s vital.” Stani Kulechov CEO

“We really did our due diligence and looked around... Chainlink is definitely the most established, and every time we dealt with them the level of expertise was incredible so I feel like we are in good hands.” Justin Moses CTO

“This product is built on the foundation of blockchain technology and utilizes Arbol’s smart contracts along with decentralized weather data provided by Chainlink to offer users a product unlike any other on the market.” Siddhartha Jha CEO and Founder

“Integrating industry-leading decentralized oracle technology is the key step in the continued decentralization of Celsius. Partnering with Chainlink solidifies our mission to bring revolutionary financial services to millions around the world.” Alex Mashinsky CEO View Chainlink Data Feeds Explore solutions

Start building with Chainlink

Guides / Random number generation

How to Get Random Numbers in an NFT

Guides / Build your own oracle

How to Build a Blockchain Lottery

Guides / Build your own oracle

How to Connect Any API with Chainlink

Guides / External Adapters

Building and Using External Adapters

Join Chainlink’s global open-source community

Chainlink is open-source technology that is collectively developed by a large community of developers, researchers, and users who share the goal of building Chainlink into a public good for the benefit of the entire blockchain ecosystem. Discord Get involved Twitter Read the latest YouTube Watch videos Telegram Join discussion GitHub Build with us

Get involved through our grant programs

Community grant program

Rewarding developers who expand the amount of data available on-chain, enhance the security of the Chainlink node infrastructure, and integrate Chainlink across new systems. Apply for a community grant

Integration grants

Encouraging projects and teams from all over the world to procure specific technological work and services from Chainlink. Apply for an integration grant

Bug bounty program

Supporting developers who examine Chainlink’s core code and harden it against potential attack vectors now and in the future. Submit a report

Research program

Funding academics and specialists who conduct and publish innovative research that enhances the security and performance of the Chainlink Network. Apply for a research grant

Chainlink news

Chainlink’s New Acquisition From Cornell University Could Transform Blockchain For Good

Chainlink announced that it has acquired DECO from Cornell University.

Chainlink to Provide Data for Farming Insurance Startup Arbol

Data provider Chainlink will provide decentralized weather data for insurance startup Arbol, according to a blog shared with CoinDesk.

Blockchain smart contracts are finally good for something in the real world

A startup says it has tackled a long-standing problem that has kept smart contracts from responding to actual events.

Chainlink’s New Acquisition From Cornell University Could Transform Blockchain For Good

Chainlink announced that it has acquired DECO from Cornell University.

Chainlink to Provide Data for Farming Insurance Startup Arbol

Data provider Chainlink will provide decentralized weather data for insurance startup Arbol, according to a blog shared with CoinDesk.

Blockchain smart contracts are finally good for something in the real world

A startup says it has tackled a long-standing problem that has kept smart contracts from responding to actual events.

Blockchain, Yesterday’s Hype, Transitions Into Something Else

Say goodbye to hype and hello to a new era of mundane usefulness for the distributed ledger. Read more news

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Connect your smart contract to the outside world

Start building your universally
connected smart contract

Highly secure and flexible infrastructure

Reliable, tamper-proof network

Seamless connection to any API

Proven, time-tested solutions

Transparent oracle computation

What is Chainlink?

The industry standard oracle network

Powering the future of smart contracts

Start building with Chainlink

How to Get Random Numbers in an NFT

How to Build a Blockchain Lottery

How to Connect Any API with Chainlink

Building and Using External Adapters

Join Chainlink’s global open-source community

Get involved through our grant programs

Community grant program

Integration grants

Bug bounty program

Research program

Chainlink news

Chainlink’s New Acquisition From Cornell University Could Transform Blockchain For Good

Chainlink to Provide Data for Farming Insurance Startup Arbol

Blockchain smart contracts are finally good for something in the real world

Chainlink’s New Acquisition From Cornell University Could Transform Blockchain For Good

Chainlink to Provide Data for Farming Insurance Startup Arbol

Blockchain smart contracts are finally good for something in the real world

Blockchain, Yesterday’s Hype, Transitions Into Something Else

Developers

Solutions

Community

Chainlink

Contact

Social

Connect your smart contract to the outside world

Start building your universally connected smart contract

Highly secure and flexible infrastructure

Reliable, tamper-proof network

Seamless connection to any API

Proven, time-tested solutions

Transparent oracle computation

What is Chainlink?

The industry standard oracle network

Powering the future of smart contracts

Start building with Chainlink

How to Get Random Numbers in an NFT

How to Build a Blockchain Lottery

How to Connect Any API with Chainlink

Building and Using External Adapters

Join Chainlink’s global open-source community

Get involved through our grant programs

Community grant program

Integration grants

Bug bounty program

Research program

Chainlink news

Chainlink’s New Acquisition From Cornell University Could Transform Blockchain For Good

Chainlink to Provide Data for Farming Insurance Startup Arbol

Blockchain smart contracts are finally good for something in the real world

Chainlink’s New Acquisition From Cornell University Could Transform Blockchain For Good

Chainlink to Provide Data for Farming Insurance Startup Arbol

Blockchain smart contracts are finally good for something in the real world

Blockchain, Yesterday’s Hype, Transitions Into Something Else

Stay updated on the latest Chainlink news

Developers

Solutions

Community

Chainlink

Contact

Social

Start building your universally
connected smart contract