API3 API

What is API3?

API3 is a decentralized oracle network that provides secure, reliable off-chain data to smart contracts. Unlike traditional oracles, API3 uses first-party oracles operated by API providers themselves, reducing middleman risk.

API3 Airnode

• First-Party Oracles - Data providers operate their own nodes
• No Middleman - Direct connection between APIs and smart contracts
• Gas-Efficient - Optimized for minimal on-chain costs
• Quantified Security - Transparent security parameters
• Easy Integration - Simple smart contract interfaces

Using API3 Data Feeds

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@api3/contracts/api3-server-v1.sol";

contract MyContract {
    Api3ServerV1 public api3Server;
    
    function readDataFeed(address _feed) public view returns (
        int256 value,
        uint256 timestamp
    ) {
        (value, timestamp) = api3Server.readDataFeed(_feed);
    }
}

Available Data Feeds

• Price Feeds - Crypto, forex, commodities
• Asset Prices - Stocks, ETFs
• Reference Rates - Benchmark rates
• Custom Feeds - Request custom data sources