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MoonKey provides comprehensive wallet infrastructure for two major blockchain ecosystems: Ethereum and Solana. These chains receive full native support with complete functionality across all MoonKey features.

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Fully supported chains

MoonKey offers complete, production-ready support for the following blockchain ecosystems:

Ethereum & EVM Networks

Full support for Ethereum and all EVM-compatible networks including Base, Arbitrum, Polygon, Optimism, and more.

Solana & SVM Networks

Complete support for Solana and all SVM-compatible networks including mainnet, devnet, and testnet.

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What “fully supported” means

Chains with full MoonKey support include:

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Complete wallet functionality

  • Create and manage embedded wallets
  • Automatic wallet creation on user login
  • Manual wallet creation when needed
  • Private key export for maximum portability

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Transaction capabilities

  • Sign messages for authentication and verification
  • Sign transactions without broadcasting
  • Send transactions with automatic broadcasting
  • Full support for smart contract interactions

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User experience features

  • Pre-built, customizable UI components
  • Headless APIs for custom interfaces
  • Real-time transaction status
  • Clear error messages and handling

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Developer tools

  • React SDK with TypeScript support
  • REST API for server-side operations
  • Comprehensive documentation
  • Code examples and guides

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Ethereum ecosystem

MoonKey provides native support for Ethereum and the entire EVM ecosystem:

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Mainnet networks

  • Ethereum - Ethereum mainnet
  • Base - Coinbase’s L2 solution
  • Arbitrum - Optimistic rollup L2
  • Optimism - Another optimistic rollup
  • Polygon - Fast and low-cost EVM sidechain
  • And more - Any EVM-compatible network

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Testnets

  • Sepolia - Ethereum testnet
  • Base Sepolia - Base testnet
  • Arbitrum Sepolia - Arbitrum testnet
  • Other testnets - All major EVM testnets

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Configuration

Configure EVM networks in your MoonKey provider: 
import { MoonKeyProvider } from '@moon-key/react-auth';
import { base, arbitrum, polygon } from 'viem/chains';

<MoonKeyProvider
  publishableKey="your_publishable_key"
  config={{
    supportedChains: [base, arbitrum, polygon]
  }}
>
  {children}
</MoonKeyProvider>
Learn more about configuring EVM networks.

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Solana ecosystem

MoonKey offers complete support for Solana and SVM-compatible networks:

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Networks

  • Mainnet Beta - Solana production network
  • Devnet - Development and testing network
  • Testnet - Public testing network
  • Custom SVM - Other SVM-compatible chains

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Configuration

Configure Solana networks with custom RPC endpoints: 
import { MoonKeyProvider } from '@moon-key/react-auth';

<MoonKeyProvider
  publishableKey="your_publishable_key"
  config={{
    solana: {
      rpcs: {
        'solana:mainnet': {
          rpc: 'https://api.mainnet-beta.solana.com',
          rpcSubscriptions: 'wss://api.mainnet-beta.solana.com'
        },
        'solana:devnet': {
          rpc: 'https://api.devnet.solana.com',
          rpcSubscriptions: 'wss://api.devnet.solana.com'
        }
      }
    }
  }}
>
  {children}
</MoonKeyProvider>
Learn more about configuring Solana networks.

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Features by chain

Both Ethereum and Solana ecosystems receive identical feature support:
FeatureEthereum/EVMSolana/SVM
Embedded wallets✓✓
Automatic creation✓✓
Sign messages✓✓
Sign transactions✓✓
Send transactions✓✓
Export private key✓✓
UI components✓✓
REST API✓✓
Custom RPC✓✓

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Custom networks

Both Ethereum and Solana support custom networks:

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Custom EVM networks

Add any EVM-compatible network using viem’s defineChain: 
import { defineChain } from 'viem';

const customChain = defineChain({
  id: 12345,
  name: 'Custom Chain',
  network: 'custom',
  nativeCurrency: {
    decimals: 18,
    name: 'Custom Token',
    symbol: 'CTK',
  },
  rpcUrls: {
    default: {
      http: ['https://custom-rpc-url.com'],
    },
  },
  blockExplorers: {
    default: {
      name: 'Explorer',
      url: 'https://explorer.custom-chain.com',
    },
  },
});

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Custom SVM networks

Connect to custom SVM-compatible networks with custom RPC endpoints: 
import { Connection } from '@solana/web3.js';

const connection = new Connection('https://custom-svm-rpc.com');

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Choosing your blockchain

When building with MoonKey, consider these factors:
  • DeFi applications - Largest DeFi ecosystem
  • NFT marketplaces - Most NFT activity
  • Smart contracts - Mature tooling and libraries
  • Institutional adoption - Widely recognized
  • L2 solutions - Fast and cheap with Base, Arbitrum, etc.
  • High performance - Fast transaction speeds
  • Low costs - Minimal transaction fees
  • Gaming - Real-time blockchain gaming
  • NFT minting - Fast and affordable minting
  • Payment applications - Micropayments and instant transfers

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Future chain support

MoonKey’s architecture is designed to support additional blockchains in the future. We’re continuously evaluating new chains and ecosystems to add to our platform.
Interested in support for a specific blockchain? Contact us to discuss your requirements.

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Best practices

  • Develop on testnets (Sepolia, Devnet)
  • Test thoroughly before mainnet deployment
  • Use separate API keys for test and production
  • Use reliable RPC providers (Alchemy, QuickNode, etc.)
  • Consider rate limits for free RPC endpoints
  • Set up fallback RPC URLs for reliability
  • Allow users to switch chains easily
  • Show current chain clearly in your UI
  • Handle transactions for the correct chain
  • Test wallets on both Ethereum and Solana
  • Verify proper chain isolation
  • Test network switching flows

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Getting started

Configure EVM Networks

Set up Ethereum and EVM-compatible chains

Configure Solana Networks

Set up Solana and SVM-compatible networks

Quick Start Guide

Build your first multi-chain wallet app

REST API

Manage wallets via REST API