Ethereum MCP

What is Ethereum MCP?

Ethereum MCP is an open-source Model Context Protocol server that bridges AI assistants with the Ethereum blockchain. It enables large language models to read on-chain data, decode smart contracts, query token balances, and interact with decentralized finance protocols — all through a standardized MCP interface.

With Ethereum being the largest smart contract platform hosting over $50 billion in DeFi total value locked, having an MCP server that can tap into this ecosystem is invaluable for developers, analysts, and researchers.

How Ethereum MCP Works

Ethereum MCP connects to an Ethereum JSON-RPC endpoint (such as Infura, Alchemy, or a local node) and exposes blockchain data through MCP tools. When an AI model needs on-chain information, it calls the appropriate tool, and Ethereum MCP handles the low-level RPC communication, data parsing, and formatting.

The server supports both mainnet and testnets (Goerli, Sepolia), making it suitable for development and production workflows. It can decode ABI-encoded data, resolve ENS names, and format Wei values into human-readable ETH amounts.

Key Use Cases

Portfolio Analysis

Ask your AI assistant to check wallet balances across multiple tokens, track historical transactions, and calculate portfolio performance — all without leaving your chat interface.

Smart Contract Auditing

Feed contract addresses to your AI model and let Ethereum MCP pull the verified source code, ABI, and transaction history for analysis. The AI can identify common vulnerability patterns and suggest improvements.

DeFi Research

Query liquidity pools, lending rates, and yield farming opportunities across protocols. Ethereum MCP provides real-time data that helps AI models give accurate DeFi recommendations.

NFT Analytics

Track NFT collections, analyze floor prices, and monitor whale wallet activity. The server can read ERC-721 and ERC-1155 metadata, ownership records, and marketplace listings.

Configuration Guide

Setting up Ethereum MCP is straightforward. You need an Ethereum RPC endpoint (free tiers available from Infura and Alchemy) and an MCP-compatible client like Claude Desktop or Cursor.

{
  "mcpServers": {
    "ethereum": {
      "command": "npx",
      "args": ["ethereum-mcp"],
      "env": {
        "ETH_RPC_URL": "https://mainnet.infura.io/v3/YOUR_KEY"
      }
    }
  }
}

The server automatically detects the network from the RPC URL and configures chain-specific parameters. For multi-chain setups, you can run multiple instances pointing to different networks.

Available Tools

Ethereum MCP exposes several powerful tools:

• eth_getBalance — Query ETH balance for any address with optional block number
• eth_getTokenBalance — Check ERC-20 token balances with decimal formatting
• eth_getTransactionHistory — Fetch and decode recent transactions
• eth_readContract — Call read-only smart contract functions
• eth_decodeTransaction — Parse transaction input data using known ABIs
• eth_resolveENS — Resolve ENS names to addresses and vice versa
• eth_getGasEstimate — Estimate gas costs for transactions

Security Considerations

Ethereum MCP operates in read-only mode by default. It cannot sign transactions or move funds unless explicitly configured with a private key (not recommended for general use). All RPC calls are made through your chosen provider's authenticated endpoint.

Performance and Caching

The server includes intelligent caching for frequently accessed data like token metadata and contract ABIs. Block-specific queries are cached permanently (since blockchain history is immutable), while latest-block queries have a short TTL to ensure freshness.

Why Use Ethereum MCP?

Instead of switching between block explorers, DeFi dashboards, and analytics tools, Ethereum MCP brings all on-chain data directly into your AI workflow. It's especially powerful for:

• Developers debugging smart contract interactions
• Analysts researching wallet activity and token flows
• Traders monitoring positions and market conditions
• Researchers studying on-chain governance and protocol metrics