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Etherscan MCP Server

Name: Etherscan MCP Server
Availability: InStock
Author: huahuayu

by huahuayu

Access blockchain data across 50+ chains via Etherscan V2 API with built-in RPC fallback.

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What it does

This server connects LLMs to the Etherscan V2 API, allowing them to retrieve real-time blockchain data including account balances, contract source code, transaction details, and gas prices. It features a unique RPC fallback mechanism for chains like BSC and Base, ensuring basic functionality even on free API plans.

Tools

getAccountBalance: Retrieve ETH or token balances for any address.
getContractSourceCode: Fetch verified contract source code.
getGasOracle: Get current network gas prices.
getTransactionByHash: Retrieve detailed transaction data.
executeContractMethod: Perform read-only calls to smart contracts.
getLatestBlockNumber: Get the most recent block height.

Installation

Add the following to your claude_desktop_config.json:

{
  "mcpServers": {
    "etherscan-mcp-server": {
      "command": "etherscan-mcp-server",
      "env": {
        "ETHERSCAN_API_KEY": "your_api_key_here"
      }
    }
  }
}

Supported hosts

claude
cursor

Quick install

make build && make install

Information

Pricing: free
Published: 4/23/2026
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Related Apps

Choose your AI client and follow the steps below.

Cursor

Add the server command and ETHERSCAN_API_KEY to the MCP settings in Cursor.

Claude Desktop

Add the server command and ETHERSCAN_API_KEY to claude_desktop_config.json.