OnchainKit - Build Onchain Apps

OnchainKit - Build Onchain Apps

Build production-ready onchain applications using Coinbase's React component library.

Overview

OnchainKit provides ready-to-use components that abstract blockchain complexity:

• No backend infrastructure required
• Works automatically on Base
• Cost-effective transactions (< $0.01 fees)

Commands

Project Setup

/​onchainkit create <project-name>    Create new onchain app
/​onchainkit add <component>          Add component to project

Templates

/​onchainkit template wallet          Wallet connection template
/​onchainkit template swap            Token swap app template
/​onchainkit template nft             NFT minting template
/​onchainkit template checkout        Payment processing template

Docs

/​onchainkit docs wallet              Wallet integration docs
/​onchainkit docs identity            Identity components docs
/​onchainkit docs swap                Token swap docs
/​onchainkit docs transaction         Transaction building docs

Core Components

Wallet Connection

import { Wallet, ConnectWallet } from '@coinbase/​onchainkit/​wallet';
<Wallet><ConnectWallet /></​Wallet>

Identity Display

import { Identity, Avatar, Name } from '@coinbase/​onchainkit/​identity';
<Identity address={address}><Avatar /><Name /></​Identity>

Token Swap

import { Swap, SwapButton } from '@coinbase/​onchainkit/​swap';
<Swap><SwapButton /></​Swap>

Quick Start

# Create new app
npm create onchain@latest

# Or add to existing project
npm install @coinbase/​onchainkit

Configuration

export NEXT_PUBLIC_CDP_API_KEY="..."        # Coinbase API key
export NEXT_PUBLIC_WC_PROJECT_ID="..."      # WalletConnect ID

Resources

• Docs: https://onchainkit.xyz
• GitHub: https://github.com/coinbase/onchainkit