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MetaMask developer documentation

Build with the world's leading self-custodial crypto wallet.

Playground

Get started with the following resources:

Features

Explore MetaMask features and capabilities for developers.

Tutorials

Step-by-step guides to help you build with MetaMask.

Quickstart

Get up and running quickly with our quickstart guides.

What do you want to do with MetaMask?

Connect to MetaMask

Connect your dapp to the MetaMask browser extension and mobile app. Ideal for users who want full control over their keys and transactions.

Create embedded wallets

Onboard power users and first-time users in seconds via social logins, passkeys, or by integrating your own authentication providers.

Create smart accounts

Integrate MetaMask Smart Accounts into your dapp. Create smart wallets that support delegated permissions, gas abstraction, and secure execution.

Build and scale your dapp

Use high performance APIs provided by MetaMask and Infura to build and scale your dapp or Snap.

Extend MetaMask's capabilities

Create a custom mini app that runs inside the MetaMask extension. Add support for custom networks, accounts types, and APIs.

Get testnet tokens

Access testnet tokens for development and testing purposes.

Contribute to MetaMask on GitHub

Join the MetaMask developer community and learn how to contribute to the MetaMask project itself.

Contribute