NEW

Chainlink Keepers are live on Polygon and Binance Smart Chain. Learn more.

Securely connect smart contracts with off-chain data and services

Chainlink decentralized oracle networks provide tamper-proof inputs, outputs, and computations to support advanced smart contracts on any blockchain.

Develop with Chainlink Explore solutions

Questions?

TOTAL VALUE SECURED:

82,376,550,025.45

Start building your hybrid smart contract with Chainlink

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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 Keepers

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int256:
1164636110501196599387136881304611
0418128642690385609708155250752713
810786281

function getRandomNumber(uint256 seed) public returns (bytes32 requestId) {
        return requestRandomness(keyHash, fee, seed);
    }

function fulfillRandomness(bytes32 requestId, uint256 randomness) internal override {
        randomResult = randomness;
    }

Integrate Chainlink VRF

RUN

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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

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 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.

Secure off-chain computation

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

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.

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.”

“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.”

View Chainlink Data Feeds Explore solutions

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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

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

Social Impact program

Working with nonprofits, NGOs, and socially conscious projects to accelerate hybrid smart contract development and enable an economically fair world.

Apply for a social impact grant

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

AP, Chainlink to Bring Trusted Data onto Leading Blockchains

The Associated Press, one of the world’s largest news organizations, is launching a Chainlink node to bring economic data, sports outcomes, and business financials on-chain.

Oracles: The Invisible Backbone of DeFi

Forbes highlights why oracles are the backbone of decentralized finance and how Chainlink helps secure tens of billions of dollars across the DeFi landscape.

Chainlink Integrates Weather Data From Google Cloud

Chainlink is collaborating with Google Cloud to enable smart contracts to query NOAA weather data on Google BigQuery for on-chain parametric insurance.

AP, Chainlink to Bring Trusted Data onto Leading Blockchains

The Associated Press, one of the world’s largest news organizations, is launching a Chainlink node to bring economic data, sports outcomes, and business financials on-chain.

Oracles: The Invisible Backbone of DeFi

Forbes highlights why oracles are the backbone of decentralized finance and how Chainlink helps secure tens of billions of dollars across the DeFi landscape.

Chainlink Integrates Weather Data From Google Cloud

Chainlink is collaborating with Google Cloud to enable smart contracts to query NOAA weather data on Google BigQuery for on-chain parametric insurance.

Securely connect smart contracts with off-chain data and services

Start building your hybrid smart contract with Chainlink

Highly secure and flexible infrastructure

Reliable, tamper-proof network

Seamless connection to any API

Proven, ready-made solutions

Secure off-chain computation

What is Chainlink?

The industry standard oracle network

Powering the future of smart contracts

Start building with Chainlink

Verify Stablecoin Collateral With Chainlink

How to Connect Any API with Chainlink

How to Fetch Cryptocurrency Prices in Solidity

Build, Deploy, and Sell Your Own Dynamic NFT

Join Chainlink’s global open-source community

Get involved through our grant programs

Community grant program

Integration grants

Social Impact program

Research program

Chainlink news

AP, Chainlink to Bring Trusted Data onto Leading Blockchains

Oracles: The Invisible Backbone of DeFi

Chainlink Integrates Weather Data From Google Cloud

AP, Chainlink to Bring Trusted Data onto Leading Blockchains

Oracles: The Invisible Backbone of DeFi

Chainlink Integrates Weather Data From Google Cloud

Securely connect smart contracts with off-chain data and services

Start building your hybrid smart contract with Chainlink

Highly secure and flexible infrastructure

Reliable, tamper-proof network

Seamless connection to any API

Proven, ready-made solutions

Secure off-chain computation

What is Chainlink?

The industry standard oracle network

Powering the future of smart contracts

Start building with Chainlink

Verify Stablecoin Collateral With Chainlink

How to Connect Any API with Chainlink

How to Fetch Cryptocurrency Prices in Solidity

Build, Deploy, and Sell Your Own Dynamic NFT

Join Chainlink’s global open-source community

Get involved through our grant programs

Community grant program

Integration grants

Social Impact program

Research program

Chainlink news

AP, Chainlink to Bring Trusted Data onto Leading Blockchains

Oracles: The Invisible Backbone of DeFi

Chainlink Integrates Weather Data From Google Cloud

AP, Chainlink to Bring Trusted Data onto Leading Blockchains

Oracles: The Invisible Backbone of DeFi

Chainlink Integrates Weather Data From Google Cloud

Stay updated on the latest Chainlink news