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Documentation Index

Fetch the complete documentation index at: https://seilabs.mintlify.app/llms.txt

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@sei-js/create-sei is a CLI tool that scaffolds production-ready Sei dApps in seconds. Quickly spin up templates with Next.js, modern wallet integration, and TypeScript support. 
npx @sei-js/create-sei app --name my-sei-app
Every generated project includes wallet connections, contract interactions, TypeScript, Tailwind CSS, Mantine UI, Biome for formatting, and responsive layouts — no additional setup required.

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Quick Start

You don’t need to install @sei-js/create-sei globally. Use it directly with npx or pnpm:
bash npx @sei-js/create-sei app --name my-sei-app

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Interactive Setup

1

Run the CLI

Execute the create-sei command with your project name:
npx @sei-js/create-sei app
2

Install and run

cd my-sei-app
npm install
npm run dev
3

Start building

The CLI automatically configures TypeScript, Next.js, Tailwind CSS, Biome formatting, Mantine UI components, and Git initialization.

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CLI Options

CommandDescription
appCreate a new Sei dApp
app --name <name>Specify a project name (must be a valid package name)
app --extension <ext>Add an optional extension to your project
list-extensionsList available extensions

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Default Template

The default template creates a Next.js + Wagmi (EVM) application — a production-ready Next.js app with Wagmi for type-safe Ethereum wallet connections and blockchain interactions. Includes built-in support for MetaMask, WalletConnect, Coinbase Wallet, and other popular wallets. Tech Stack: Next.js 14, Wagmi v2, Viem, TanStack Query, Tailwind CSS 
npx @sei-js/create-sei app --name my-sei-app

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Extensions

Enhance your project with additional functionality using extensions.

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List Available Extensions

npx @sei-js/create-sei list-extensions

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Precompiles Extension

Add Sei precompile contract integration with examples for querying native blockchain data like token supply, staking info, and governance proposals. 
npx @sei-js/create-sei app --name my-sei-precompile-app --extension precompiles
Includes Bank precompile, Staking precompile, and Governance precompile examples.

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What’s Included

After running the CLI, you’ll have a fully configured Sei dApp ready for development:
  • Project structure — Organized file structure with components, hooks, and utilities
  • Wallet integration — Pre-configured wallet connections and hooks
  • Development tools — TypeScript, Biome, Mantine UI, and Tailwind CSS with sensible defaults
  • Sei network integration — Built-in network configuration and contract interaction examples
Prerequisites: Node.js v18 or higher is required. Use node --version to verify your installation.

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Troubleshooting

  • Node version conflicts — Use nvm use to switch to the correct Node.js version
  • Permission errors — Avoid using sudo with npm. Use nvm or fix npm permissions
  • Network timeouts — Try switching to a different registry: npm config set registry https://registry.npmjs.org/