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Connect to EVM and Solana in MetaMask

Get started with MetaMask Connect in your multichain JavaScript dapp. You can connect to EVM networks and Solana in MetaMask at the same time, and make requests to each network without having to switch between them.

Prerequisites​

  • Node.js version 19 or later installed.
  • A package manager installed, such as npm, Yarn, pnpm, or bun.
  • MetaMask installed in your browser or on mobile.

Steps​

1. Install MetaMask Connect​

Install MetaMask Connect in an existing JavaScript project:

npm install @metamask/connect-multichain

2. Initialize MetaMask Connect​

Initialize MetaMask Connect with configuration options:

import { createMultichainClient } from "@metamask/connect-multichain"

const multichainClient = createMultichainClient({
  dapp: {
    name: "Metamask Connect Multichain Example",
    url: window.location.href,
    iconUrl: "https://mydapp.com/icon.png" // Optional
  },
  api: {
    supportedNetworks: {
      'eip155:1': 'https://mainnet.infura.io/v3/YOUR_INFURA_API_KEY', // Ethereum Mainnet
      'eip155:11155111': 'https://sepolia.infura.io/v3/YOUR_INFURA_API_KEY', // Ethereum Sepolia
      'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp': 'https://api.mainnet.solana.com', // Solana Mainnet
      'solana:4sGjMW1sUnHzSxGspuhpqLDx6wiyjNtZ': 'https://api.devnet.solana.com', // Solana Devnet
    },
  },
})

This example configures MetaMask Connect with the following options:

  • dapp - Ensures trust by showing your dapp's name, url, and iconUrl during connection.
  • api.supportedNetworks - A map of caipChainIds -> RPC URLs for all networks supported by the app.

3. Connect and use provider​

Connect to MetaMask and get the provider for RPC requests:

await multichainClient.connect()

const provider = multichainClient.getProvider()

// TODO: replace with provider snippet
const result = await provider.request({
  chain: 'eip155:1',
  method: 'eth_accounts',
  params: [],
});
console.log('eth_accounts result:', result)

Next steps​

Now that you've connected to multiple ecosystems in MetaMask, learn how to send EVM and Solana transactions.

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