MCP Crypto Wallet EVM

This repository contains a Model Context Protocol (MCP) server that provides Claude with access to Ethereum and EVM-compatible blockchain operations via ethers.js v5. The server enables Claude to perform operations like creating wallets, checking balances, sending transactions, and interacting with smart contracts on EVM-compatible blockchains.

Overview

The MCP server exposes the following tools to Claude:

Wallet Creation and Management

• wallet_create_random: Create a new wallet with a random private key
• wallet_from_private_key: Create a wallet from a private key
• wallet_from_mnemonic: Create a wallet from a mnemonic phrase
• wallet_from_encrypted_json: Create a wallet by decrypting an encrypted JSON wallet
• wallet_encrypt: Encrypt a wallet with a password

Wallet Properties

• wallet_get_address: Get the wallet address
• wallet_get_public_key: Get the wallet public key
• wallet_get_private_key: Get the wallet private key (with appropriate security warnings)
• wallet_get_mnemonic: Get the wallet mnemonic phrase (if available)

Blockchain Methods

• wallet_get_balance: Get the balance of the wallet
• wallet_get_chain_id: Get the chain ID the wallet is connected to
• wallet_get_gas_price: Get the current gas price
• wallet_get_transaction_count: Get the number of transactions sent from this account (nonce)
• wallet_call: Call a contract method without sending a transaction

Transaction Methods

• wallet_send_transaction: Send a transaction
• wallet_sign_transaction: Sign a transaction without sending it
• wallet_populate_transaction: Populate a transaction with missing fields

Signing Methods

• wallet_sign_message: Sign a message
• wallet_sign_typed_data: Sign typed data (EIP-712)
• wallet_verify_message: Verify a signed message
• wallet_verify_typed_data: Verify signed typed data

Provider Methods

• provider_get_block: Get a block by number or hash
• provider_get_transaction: Get a transaction by hash
• provider_get_transaction_receipt: Get a transaction receipt
• provider_get_code: Get the code at an address
• provider_get_storage_at: Get the storage at a position for an address
• provider_estimate_gas: Estimate the gas required for a transaction
• provider_get_logs: Get logs that match a filter
• provider_get_ens_resolver: Get the ENS resolver for a name
• provider_lookup_address: Lookup the ENS name for an address
• provider_resolve_name: Resolve an ENS name to an address

Network Methods

• network_get_network: Get the current network information
• network_get_block_number: Get the current block number
• network_get_fee_data: Get the current fee data (base fee, max priority fee, etc.)

Prerequisites

• Node.js (v16 or higher)
• Claude Desktop application

Installation

Option 1: Using npx (Recommended)

You can run the MCP server directly without installation using npx:

This will download and execute the server directly from npm.

Option 2: Manual Installation

1. Clone this repository:
   git clone https://github.com/dcSpark/mcp-cryptowallet-evm.git cd mcp-cryptowallet-evm
2. Install dependencies:
   npm ci
3. Build the project:
   npm run build

Configuration

Environment Variables

The MCP server supports the following environment variables:

• PRIVATE_KEY: Optional private key to use for wallet operations when no wallet is explicitly provided

Configure Claude Desktop

To configure Claude Desktop to use this MCP server:

1. Open Claude Desktop
2. Navigate to the Claude Desktop configuration file:
   • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
   • Windows: %APPDATA%\Claude\claude_desktop_config.json
   • Linux: ~/.config/Claude/claude_desktop_config.json
3. Add the MCP server configuration:

Alternatively, if you installed the package locally:

Running Locally

Usage

Once configured, restart Claude Desktop. Claude will now have access to the Ethereum and EVM-compatible blockchain tools. You can ask Claude to:

1. Create a new wallet:
   Can you create a new Ethereum wallet for me?
2. Check a wallet balance:
   What's the balance of the Ethereum wallet address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e?
3. Send a transaction:
   Can you help me send 0.1 ETH to 0x742d35Cc6634C0532925a3b844Bc454e4438f44e?

Claude will use the MCP server to interact with the Ethereum blockchain directly.

Development

Adding New Tools

To add new tools to the MCP server:

1. Define the tool in src/tools.ts
2. Create a handler function in the appropriate handler file
3. Add the handler to the handlers object in src/tools.ts

Building

License

MIT