Skip to main content

Welcome

Welcome to the MetaMask Wallet API documentation!

Building a cross-platform or mobile app?

For cross-platform development, mobile integration, or advanced features like QR codes and deep linking, check out the MetaMask SDK docs.

What is the Wallet API?​

The Wallet API is MetaMask's core interface for web applications to interact with the MetaMask browser extension. It enables you to:

  • Connect web dApps to MetaMask browser extension
  • Interact with users' Ethereum accounts
  • Send transactions and sign messages
  • Listen to account and network changes
  • Use the provider methods
  • Use the JSON-RPC methods

The Wallet API uses standardized JSON-RPC calls to interact with users' EVM accounts and implements standard interfaces like EIP-1193 for Ethereum provider methods and EIP-6963 for wallet detection.

Wallet API vs SDK​

The Wallet API is designed for web applications that connect to the MetaMask browser extension. If you're building a desktop web-only dApp, the Wallet API provides everything you need.

The MetaMask SDK builds on top of the Wallet API, adding cross-platform support and features like mobile deep linking and QR code connections. SDK is recommended if you want to build a cross-platform on chain apps.