JamesANZ/evm-mcp

Complete EVM JSON-RPC access in your AI workflow. Query any EVM-compatible network (Ethereum, Polygon, Arbitrum, Optimism, BSC, and more) through any node provider. Works with Infura, Alchemy, QuickNode, local nodes, and more.

An MCP (Model Context Protocol) server that provides comprehensive access to Ethereum Virtual Machine (EVM) JSON-RPC methods for AI coding environments like Cursor and Claude Desktop.

Why Use EVM MCP?

• 🌐 Any EVM Network – Ethereum, Polygon, Arbitrum, Optimism, BSC, Avalanche, and more
• 🔌 Any Node Provider – Infura, Alchemy, QuickNode, local nodes, or custom RPC
• 📊 20+ RPC Methods – Complete access to blockchain data, transactions, and contracts
• ⚡ Easy Setup – One-click install in Cursor or simple manual setup
• 🔧 Flexible Configuration – Works with any JSON-RPC compatible endpoint

Quick Start

Ready to interact with EVM blockchains? Install in seconds:

Install in Cursor (Recommended):

🔗 Install in Cursor

Or install manually:

npm install -g @jamesanz/evm-mcp
# Or from source:
git clone https://github.com/JamesANZ/evm-mcp.git
cd evm-mcp && npm install && npm run build

Features

🔢 Blockchain Data

• eth_blockNumber – Get latest block number
• eth_getBalance – Get account balance
• eth_getTransactionCount – Get transaction count (nonce)
• eth_getBlockByNumber – Get block information
• eth_getTransactionByHash – Get transaction details
• eth_getTransactionReceipt – Get transaction receipt
• eth_getCode – Get contract bytecode
• eth_getStorageAt – Get storage value

🔄 Transactions

• eth_call – Execute contract call
• eth_estimateGas – Estimate gas for transaction
• eth_sendRawTransaction – Send signed transaction
• eth_gasPrice – Get current gas price

🧪 Transaction Simulation (read-only, never broadcasts)

Craft transactions in natural language and simulate them against forked/overridden EVM state. Reports whether a transaction would succeed or revert, the revert reason in plain English, estimated gas, and balance/state changes. Supports address aliases and ENS names (e.g. alice.eth). By default the sender is funded with virtual ETH so a simulation can run "from" any address; set fund: false to use real balances.

• simulate_native_transfer – Simulate sending native currency (e.g. "Transfer 100 ETH from A to B")
• simulate_erc20_transfer – Simulate an ERC20 transfer with human amounts (e.g. "Transfer 10 USDC to alice.eth from fun.eth")
• simulate_contract_call – Encode a function signature + args and simulate the call
• simulate_transaction – Simulate a raw transaction (from/to/value/data)
• encode_function_data – Encode calldata from a human-readable signature (pure helper, no RPC)

These tools only use eth_call, eth_estimateGas, and debug_traceCall (when the provider supports it). They never sign or send a real transaction. Real state diffs are used when debug_traceCall is available; otherwise changes are inferred from the decoded intent.

📊 Events & Logs

• eth_getLogs – Get event logs

🌍 Network

• list_supported_networks – List configured networks and providers
• list_known_addresses – List configured wallet aliases and known token/contract addresses
• eth_chainId – Get chain ID
• net_version – Get network version
• net_listening – Check if listening
• net_peerCount – Get peer count

🌐 Web3

• web3_clientVersion – Get client version
• web3_sha3 – Hash data with Keccak-256

Installation

Cursor (One-Click)

Click the install link above or use:

cursor://anysphere.cursor-deeplink/mcp/install?name=evm-mcp&config=eyJldm0tbWNwIjp7ImNvbW1hbmQiOiJucHgiLCJhcmdzIjpbIi15IiwiQGphbWVzYW56L2V2bS1tY3AiXX19

Manual Installation

Requirements: Node.js 18+ and npm

# Clone and build
git clone https://github.com/JamesANZ/evm-mcp.git
cd evm-mcp
npm install
npm run build

# Set provider API keys
export INFURA_API_KEY="your-infura-api-key"
export DEFAULT_NETWORK="ethereum"
export DEFAULT_PROVIDER="infura"

# Run server
npm start

Claude Desktop

Add to claude_desktop_config.json:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "evm-mcp": {
      "command": "node",
      "args": ["/absolute/path/to/evm-mcp/build/index.js"],
      "env": {
        "INFURA_API_KEY": "your-infura-api-key",
        "DEFAULT_NETWORK": "ethereum",
        "DEFAULT_PROVIDER": "infura",
        "RPC_PROVIDER_ORDER": "infura,alchemy"
      }
    }
  }
}

Restart Claude Desktop after configuration.

Configuration

Environment Variables

Variable	Required	Description
INFURA_API_KEY	One of*	Infura project API key (built-in preset)
ALCHEMY_API_KEY	One of*	Alchemy app API key (built-in preset)
DEFAULT_NETWORK	No	Default chain slug or chain ID (default: ethereum)
DEFAULT_PROVIDER	No	Provider slug to prefer (infura, alchemy, or custom)
RPC_PROVIDER_ORDER	No	Comma-separated provider fallback order (default: infura,alchemy)
CUSTOM_PROVIDERS	One of*	JSON array of user-defined providers
CUSTOM_NETWORKS	One of*	JSON array of user-defined networks
KNOWN_ADDRESSES	No	JSON array of known tokens/contracts (network-scoped)
WALLET_ADDRESSES	No	JSON array of personal wallet and contract aliases

*At least one provider API key, custom provider, or custom network with rpcUrl is required.

Built-in Providers (Infura / Alchemy)

Set an API key and the server builds RPC URLs automatically for supported networks:

{
  "INFURA_API_KEY": "your-infura-key",
  "DEFAULT_NETWORK": "ethereum",
  "DEFAULT_PROVIDER": "infura",
  "RPC_PROVIDER_ORDER": "infura,alchemy"
}

Each RPC tool accepts an optional network parameter (slug, name, or chain ID). When omitted, DEFAULT_NETWORK is used.

{
  "tool": "eth_chainId",
  "arguments": { "network": "polygon" }
}

Use list_supported_networks to discover configured networks and providers.

Custom Providers (CUSTOM_PROVIDERS)

Register any RPC provider by supplying a base URL template and network-specific URLs:

"CUSTOM_PROVIDERS": "[{\"slug\":\"quicknode\",\"apiKeyEnv\":\"QUICKNODE_API_KEY\",\"baseUrl\":\"https://rpc.example.com/v1/{apiKey}\",\"networkUrls\":{\"ethereum\":\"https://eth.quiknode.pro/{apiKey}/\",\"polygon\":\"https://polygon.quiknode.pro/{apiKey}/\"}}]"

• Absolute networkUrls values are used directly (with {apiKey} substitution).
• Relative paths (starting with /) are appended to baseUrl.

Custom Networks (CUSTOM_NETWORKS)

Register arbitrary chains by name:

"CUSTOM_NETWORKS": "[{\"name\":\"HyperEVM\",\"slug\":\"hyperevm\",\"chainId\":999,\"rpcUrl\":\"https://rpc.hyperliquid.xyz/evm\"}]"

Or route through a provider by setting provider and adding the network slug to that provider's networkUrls.

Known Addresses (KNOWN_ADDRESSES)

Register tokens and contracts by name so tools accept aliases like USDC instead of raw hex addresses. Each entry is scoped to a network:

"KNOWN_ADDRESSES": "[{\"name\":\"USDC\",\"address\":\"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48\",\"network\":\"ethereum\",\"type\":\"token\",\"decimals\":6,\"aliases\":[\"usd-coin\"]}]"

Field	Required	Description
name	yes	Primary lookup key
address	yes	Checksummed contract address
network	yes	Chain slug, name, chain ID, or network alias
type	no	token or contract (default: contract)
decimals	no	Token decimals for formatted balances
aliases	no	Extra lookup keys

When eth_getBalance is called with a token alias, the server uses the first configured wallet in WALLET_ADDRESSES as the token holder.

Wallet Addresses (WALLET_ADDRESSES)

Register personal wallets and contracts by alias so you can say "check my personal wallet" instead of pasting hex:

"WALLET_ADDRESSES": "[{\"name\":\"my-wallet\",\"address\":\"0x42ea529282DDE0AA87B42d9E83316eb23FE62c3f\",\"aliases\":[\"personal\",\"my wallet\"],\"description\":\"Main EOA\"}]"

Field	Required	Description
name	yes	Primary lookup key
address	yes	Wallet or contract address
network	no	Scope alias to one chain (default: all chains)
aliases	no	Extra lookup keys
description	no	Human-readable note

Address aliases work in eth_getBalance, eth_getCode, eth_call, eth_getLogs, and other tools that accept address parameters. Use list_known_addresses to discover configured aliases.

Migration from RPC_URL

- "RPC_URL": "https://mainnet.infura.io/v3/KEY"
- "CHAIN_ID": "1"
+ "INFURA_API_KEY": "KEY"
+ "DEFAULT_NETWORK": "ethereum"
+ "DEFAULT_PROVIDER": "infura"

Configuration changes require restarting the MCP server.

Supported Built-in Networks

• Ethereum: Mainnet, Sepolia
• Polygon: Mainnet, Amoy
• Arbitrum: One, Sepolia
• Optimism: Mainnet, Sepolia
• BNB Smart Chain: Mainnet, Testnet
• Avalanche: C-Chain
• Base: Mainnet, Sepolia
• Any EVM-compatible chain via CUSTOM_NETWORKS

Usage Examples

Get Latest Block Number

Query the current block number:

{
  "tool": "eth_blockNumber",
  "arguments": {}
}

Get Account Balance

Check an address balance using a hex address or configured alias:

{
  "tool": "eth_getBalance",
  "arguments": {
    "address": "personal",
    "blockNumber": "latest"
  }
}

Get Transaction Details

View transaction information:

{
  "tool": "eth_getTransactionByHash",
  "arguments": {
    "txHash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"
  }
}

Call Smart Contract

Execute a contract call:

{
  "tool": "eth_call",
  "arguments": {
    "to": "0xA0b86a33E6441c8C06DDD46C310c0eF8D9441C8F",
    "data": "0x70a08231000000000000000000000000742d35Cc6634C0532925a3b8D6Ac6e2F0C4C9B7C"
  }
}

Get Event Logs

Query contract events:

{
  "tool": "eth_getLogs",
  "arguments": {
    "fromBlock": "0x1234567",
    "toBlock": "latest",
    "address": "0xA0b86a33E6441c8C06DDD46C310c0eF8D9441C8F",
    "topics": [
      "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"
    ]
  }
}

Use Cases

• Blockchain Analytics – Query transaction data, balances, and contract states
• DeFi Applications – Monitor token balances, transaction receipts, and smart contract calls
• NFT Projects – Track transfers, metadata, and collection statistics
• Development Tools – Debug transactions, estimate gas, and test smart contracts
• Monitoring – Watch for specific events and transaction patterns
• Research – Analyze blockchain data across multiple EVM networks

Technical Details

Built with: Node.js, TypeScript, MCP SDK, Ethers.js
Dependencies: @modelcontextprotocol/sdk, ethers, zod
Platforms: macOS, Windows, Linux

Environment Variables: See Configuration above.

Contributing

⭐ If this project helps you, please star it on GitHub! ⭐

Contributions welcome! Please open an issue or submit a pull request.

License

MIT License – see LICENSE.md for details.

Support

If you find this project useful, consider supporting it:

⚡ Lightning Network

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₿ Bitcoin: bc1ptzvr93pn959xq4et6sqzpfnkk2args22ewv5u2th4ps7hshfaqrshe0xtp

Ξ Ethereum/EVM: 0x42ea529282DDE0AA87B42d9E83316eb23FE62c3f