Transaction Value Enabled:

Connecting the world to blockchains

Chainlink is the industry-standard Web3 services platform connecting the people, businesses, and data of today with the Web3 world of tomorrow.

Develop with Chainlink Explore solutions

Questions?

Create Web3 value with Chainlink solutions

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 existing systems, and integrate with any current or future blockchain.

Proven, ready-made solutions

Integrate pre-built, time-tested oracle solutions that already secure tens of billions in smart contract value for market-leading decentralized applications.

Highly reliable automation

Use a decentralized network of Chainlink Automation nodes to automate contracts, mitigating risk of manual interventions and centralized servers.

Deploy your Chainlink smart contract

Integrate Chainlink services into your dApp today

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int256:
34361000000

function getThePrice() public view returns (int) {
        (
            uint80 roundID, 
            int price,
            uint startedAt,
            uint timeStamp,
            uint80 answeredInRound
        ) = priceFeed.latestRoundData();
        return price;
    }

Integrate Price Feeds

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uint256:
30218644067796614000

function requestAvgTemp(
    ) external {
        Chainlink.Request memory req = buildChainlinkRequest(
            avgTempJobId,
            address(this),
            this.fulfillAvgTemp.selector
        );
        sendChainlinkRequest(req, fee);
    }

Integrate weather data

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int256:
168000000000000000000

function requestScore(
    ) external {
        Chainlink.Request memory req = buildChainlinkRequest(
            sportScoreJobId,
            address(this),
            this.fulfillWinner.selector
        );
        sendChainlinkRequest(req, fee);
    }

Integrate sports data

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TRUE

function checkUpkeep(
    bytes calldata checkData
  )
    external
    returns (
        bool upkeepNeeded,
        bytes memory performData
    );

Integrate Chainlink Automation

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int256:
1164636110501196599387136881304611
0418128642690385609708155250752713
810786281

unit256 public randomResult; 
function fulfillRandomness(uint256 requestId, unit256[] randomness) internal override {
       randomResult = (randomness[0] % 50) + 1;
}

Integrate Chainlink VRF

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int256:
425500000000000000000

function requestData() public returns (bytes32 requestId) 
{
    Chainlink.Request memory request = buildChainlinkRequest(jobId, address(this), this.fulfill.selector);
    request.add("get", "https://my-api.com/endpoint");
    request.add("path", "status");    
    return sendChainlinkRequestTo(oracle, request, fee);
}
function fulfill(bytes32 _requestId, uint256 _response) public recordChainlinkFulfillment(_requestId)
{
    response = _response;
}

Access any external data

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.”

“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.”

“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.”

"Public network infrastructure provisioning has been a core business model of telco companies for decades. Providing critical Web3 infrastructure by running Chainlink oracle nodes has enabled new revenue streams and opened the door to Web3 opportunities."

View Chainlink Data Feeds Explore solutions

Build and learn with Chainlink

Verifiable randomness

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.

Get involved through our grant programs

The Chainlink Grant Program funds individuals and teams building a more functional, accessible, and impactful smart contract economy.

Chainlink news

Bloomberg TV: Sergey Nazarov discusses AI and blockchain technology

Sergey Nazarov, Co-Founder of Chainlink, a Web3 services platform, says blockchains are AI resistant because they are built to resist adversaries.

Coinbase Cloud Will Run Chainlink Node in Bid to Improve Smart Contract Security

Oracles like Chainlink are the way that DeFi protocols get access to data that allow them to execute smart contracts.

Chainlink’s new platform lets web3 projects connect to Web 2.0 systems like AWS and Meta

Chainlink, a web3 services platform, is launching a self-service, serverless platform to help developers connect their decentralized applications (dApps) or smart contracts to any Web 2.0 API

Bloomberg TV: Sergey Nazarov discusses AI and blockchain technology

Sergey Nazarov, Co-Founder of Chainlink, a Web3 services platform, says blockchains are AI resistant because they are built to resist adversaries.

Coinbase Cloud Will Run Chainlink Node in Bid to Improve Smart Contract Security

Oracles like Chainlink are the way that DeFi protocols get access to data that allow them to execute smart contracts.

Chainlink’s new platform lets web3 projects connect to Web 2.0 systems like AWS and Meta

Chainlink, a web3 services platform, is launching a self-service, serverless platform to help developers connect their decentralized applications (dApps) or smart contracts to any Web 2.0 API

What Are Proof of Reserves And Why Do They Matter?

Crypto’s latest obsession has been executing proof-of-reserve attestations. But what do they mean, and are all attestations created equal?

Connecting the world to blockchains

Create Web3 value with Chainlink solutions

Reliable, tamper-proof network

Seamless connection to any API

Proven, ready-made solutions

Highly reliable automation

Integrate Chainlink services into your dApp today

Powering the future of smart contracts

Build and learn with Chainlink

What Is Chainlink? A Beginner’s Guide

77+ Smart Contract Use Cases Enabled By Chainlink

How to Connect Any API with Chainlink

Build, Deploy, and Sell Your Own Dynamic NFT

Join Chainlink’s global open-source community

Get involved through our grant programs

Chainlink news

Bloomberg TV: Sergey Nazarov discusses AI and blockchain technology

Coinbase Cloud Will Run Chainlink Node in Bid to Improve Smart Contract Security

Chainlink’s new platform lets web3 projects connect to Web 2.0 systems like AWS and Meta

Bloomberg TV: Sergey Nazarov discusses AI and blockchain technology

Coinbase Cloud Will Run Chainlink Node in Bid to Improve Smart Contract Security

Chainlink’s new platform lets web3 projects connect to Web 2.0 systems like AWS and Meta

What Are Proof of Reserves And Why Do They Matter?

Connecting the world to blockchains

Create Web3 value with Chainlink solutions

Reliable, tamper-proof network

Seamless connection to any API

Proven, ready-made solutions

Highly reliable automation

Integrate Chainlink services into your dApp today

Powering the future of smart contracts

Build and learn with Chainlink

What Is Chainlink? A Beginner’s Guide

77+ Smart Contract Use Cases Enabled By Chainlink

How to Connect Any API with Chainlink

Build, Deploy, and Sell Your Own Dynamic NFT

Join Chainlink’s global open-source community

Get involved through our grant programs

Chainlink news

Bloomberg TV: Sergey Nazarov discusses AI and blockchain technology

Coinbase Cloud Will Run Chainlink Node in Bid to Improve Smart Contract Security

Chainlink’s new platform lets web3 projects connect to Web 2.0 systems like AWS and Meta

Bloomberg TV: Sergey Nazarov discusses AI and blockchain technology

Coinbase Cloud Will Run Chainlink Node in Bid to Improve Smart Contract Security

Chainlink’s new platform lets web3 projects connect to Web 2.0 systems like AWS and Meta

What Are Proof of Reserves And Why Do They Matter?

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