Ethereum provider API
MetaMask injects a global JavaScript API into websites visited by its users using the
window.ethereum provider object.
This API is specified by EIP-1193, and it allows dapps to
request users' Ethereum accounts, read data from blockchains the user is connected to, suggest
that the user sign messages and transactions, and more.
The MetaMask Ethereum provider API contains the following:
- Properties - The provider contains a property that detects if a user has MetaMask installed.
- Methods - The provider contains methods that dapps can call.
The
window.ethereum.request(args)provider method wraps the MetaMask JSON-RPC API; dapps can use this provider method to call any RPC method. - Events - The provider emits events that dapps can listen to.
View the provider API reference for all the provider properties, methods, and events.
You can call the provider API from a dapp with or without MetaMask SDK installed, but we recommend using the SDK to enable users to easily connect to the MetaMask browser extension and MetaMask Mobile. The SDK supports multiple dapp platforms including mobile and gaming dapps.
Get started by setting up the SDK.