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Etherscan MCP Server

@huahuayu

Repository

Basic information

Category

Other

Transports

stdio

Author

huahuayu

Submitted by

Shiming Liu

About Etherscan MCP Server

etherscan v2 api mcp server

Etherscan MCP Server config

Add this server to your MCP-compatible client using the configuration below.

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

Etherscan MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is Etherscan MCP Server?

Etherscan MCP Server is a Go implementation of an Etherscan API client for the Model Context Protocol (MCP). It enables LLM applications to access blockchain data from over 50 supported chains via a single Etherscan API key.

How to use Etherscan MCP Server?

Set the ETHERSCAN_API_KEY environment variable, build with make build, and run the server in default stdin/stdout mode or SSE mode with --sse. Provide the server configuration in your MCP client’s JSON settings.

Key features of Etherscan MCP Server

  • Access Etherscan API V2 for multi-chain support
  • Single API key for 50+ supported chains
  • Supports account balances, block info, and contract data
  • Provides gas oracle, token, and transaction data
  • Operates in stdin/stdout or SSE transport modes
  • Includes 19 structured blockchain data tools

Use cases of Etherscan MCP Server

  • Query ETH balances and token holdings for any address
  • Retrieve contract source code and ABI for verified contracts
  • Monitor pending transactions and gas prices on Ethereum
  • Track token transfers and NFT holdings across chains
  • Compare gas usage and activity between different L2s

Frequently asked questions

1

What API key is needed?

You must obtain an Etherscan API key from [etherscan.io/myapikey](https://etherscan.io/myapikey) and set it as the `ETHERSCAN_API_KEY` environment variable.

2

What chains does the server support?

It supports over 50 chains via Etherscan API V2. See the [supported chains list](https://docs.etherscan.io/etherscan-v2/getting-started/supported-chains) for details.

3

How does the server communicate with clients?

Two modes are available: default stdin/stdout for direct MCP integration, and SSE mode with `--sse` that listens on HTTP (default port 4000).

4

Can I use it with Cursor or similar tools?

Yes. Configure it under `mcpServers` in your editor’s MCP settings JSON, setting the command or URL and passing `ETHERSCAN_API_KEY` as an environment variable.

5

Are there any runtime dependencies besides the API key?

The only required dependency is an Etherscan API key. The server is built from Go source, but no Go runtime is needed after building the binary.

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