Etherscan MCP Server

Name: Etherscan MCP Server
Author: friendlygeorge

by friendlygeorgeversion 1.0.0i★ –iRuns on your computer

Registry nameio.github.friendlygeorge/etherscan-mcp-server

Install

Overview

Description from the maker (original English)

MCP server for Etherscan — Ethereum blockchain explorer API for AI assistants

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "etherscan": {
      "command": "npx",
      "args": [
        "-y",
        "etherscan-mcp-server"
      ]
    }
  }
}

Run this in your terminal

claude mcp add etherscan -- npx -y etherscan-mcp-server

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "etherscan": {
      "command": "npx",
      "args": [
        "-y",
        "etherscan-mcp-server"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "etherscan": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "etherscan-mcp-server"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account friendlygeorge, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32476 servers in this category
Published to the registry more recently than 12% of the other 32476 servers in this category
Basic checks equal to or better than 100% of the other 32476 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Etherscan MCP Server safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 5 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, zanadir

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Spec Driven Development

by formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Runs on your computer★ 440MITUpdated 14 months ago

Install

Remote Desktop Commander

by desktop-commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

Runs in the cloud★ 211Updated yesterday

Install

zanadir

by MustacheCase

Find what a repository's CI is missing, and which security checks cannot fail the build.

Runs on your computerUpdated today

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Etherscan MCP Server

An MCP server for Etherscan — connect any MCP-compatible client to the Ethereum blockchain explorer.

What is this?

An MCP (Model Context Protocol) server that gives AI assistants and agents access to Etherscan's Ethereum blockchain explorer API — ETH balances, ERC-20 token balances, transaction history, contract ABIs, and gas prices — through natural language.

Use it with Claude Desktop, Cursor, Windsurf, Cline, Continue, or any MCP-compatible client to inspect wallets, audit contracts, and analyze on-chain activity.

Why use this?

No API key required — works out of the box with Etherscan's free tier (limited to ~1 call/5s without a key)
Optional API key support — set ETHERSCAN_API_KEY for 5 calls/sec and full results
8 built-in tools — covers the most common on-chain queries
Clean markdown output — results read naturally in chat
Rate-limited automatically — respects free tier limits, retries on 429

Tools

Tool	Description
`get_eth_balance`	Get native ETH balance for an address
`get_token_balances`	Get all ERC-20 token balances for an address
`get_transaction`	Get full details for a transaction by hash
`get_transactions_by_address`	Get normal (external) transactions for an address
`get_erc20_transfers`	Get ERC-20 token transfer events for an address
`get_internal_transactions`	Get internal (contract-called) transactions for an address
`get_contract_abi`	Get the ABI for a verified smart contract
`get_gas_price`	Get current gas price oracle (slow/standard/fast in Gwei)

Quick Start

1. Add to your MCP client

Add this to your MCP client config (e.g. claude_desktop_config.json):

"mcpServers": { "etherscan": { "command": "npx", "args": ["-y", "etherscan-mcp-server"] } } }

That's it. npx downloads and runs it automatically. For higher rate limits, get a free API key at etherscan.io/apis and add it:

"mcpServers": { "etherscan": { "command": "npx", "args": ["-y", "etherscan-mcp-server"], "env": { "ETHERSCAN_API_KEY": "your_key_here" } } } }

2. Use it

Ask your AI assistant things like:

"What's the ETH balance of vitalik.eth's address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045?"
"Show me the ERC-20 token balances for that address"
"Get details for transaction 0x..."
"List the last 20 normal transactions for this address"
"Show me all USDT transfers to this wallet"
"Fetch the ABI for the USDC contract 0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48"
"What are current gas prices on Ethereum mainnet?"

Example Output

`get_eth_balance`

ETH Balance for 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045

247.3821 ETH

`get_gas_price`

⛽ Etherscan Gas Price Oracle

Safe Low (🐢): 12.50 Gwei
Standard (🚗): 15.20 Gwei
Fast (🚀): 18.90 Gwei

Last Block: 19850000
Gas Used Ratio: 0.512
Suggested Base Fee: 13.40 Gwei

*Estimated tx cost for 21,000 gas: 🐢 0.000263 ETH | 🚀 0.000397 ETH*

`get_transactions_by_address`

Normal Transactions for 0xd8dA...6045 (20 results, page 1)

✅ ↗ OUT 0.5 ETH · transfer — block 19,850,123 — 2026-06-05 — gas: 15.20 Gwei — hash: 0x4f8a2b9c3d1e5f7a...
✅ ↙ IN 1.2 ETH · transfer — block 19,849,876 — 2026-06-05 — gas: 14.80 Gwei — hash: 0x9c1d4e7f2a8b6c3d...
❌ ↗ OUT 0.0 ETH · swapExactTokensForETH — block 19,849,500 — 2026-06-05 — gas: 22.10 Gwei — hash: 0x2b7c9e1f4a3d8b5c...

`get_contract_abi`

Contract ABI for 0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48

Functions: 28
Events: 13
Constructors: 1
Fallback/Receive: 0

Functions (showing first 25)

name() → string (view)
symbol() → string (view)
decimals() → uint8 (view)
totalSupply() → uint256 (view)
balanceOf(address) → uint256 (view)
transfer(address,uint256) → bool (nonpayable)
approve(address,uint256) → bool (nonpayable)
transferFrom(address,address,uint256) → bool (nonpayable) ...

Use Cases

Wallet Inspection

"Check the ETH and token balances of this address" — get a snapshot of any wallet's holdings in seconds. Works with any Ethereum address, including smart contract wallets and multisigs.

Transaction Forensics

"Show me the last 20 transactions for this address" — trace on-chain activity, identify counterparties, and understand fund flows. Use get_internal_transactions for contract calls and get_erc20_transfers for token movements.

Smart Contract Analysis

"Get the ABI for the Uniswap Router contract" — fetch verified contract ABIs to understand what functions are available. Essential for debugging failed transactions or understanding how a protocol works.

Gas Optimization

"What are current gas prices?" — get slow/standard/fast gas estimates with projected transaction costs. Time your transactions to save on fees.

DeFi Portfolio Tracking

"Show me all token balances for my wallet" — aggregate holdings across ERC-20 tokens. Combine with get_prices from the CoinGecko MCP server for full portfolio valuation.

Security Auditing

"List all internal transactions for this contract" — trace internal calls to understand contract behavior. Useful for identifying unusual patterns or verifying that a contract does what it claims.

Security

No API key required — works with Etherscan's free tier. Optional API key for higher rate limits.
Read-only — only fetches public blockchain data from Etherscan's API. No writes, no mutations.
No local file access — does not read or write any files on your machine.
No shell access — does not execute commands or spawn processes.
Rate-limited — automatically caps requests to stay within free tier limits.
Open source — MIT licensed. Inspect the code at GitHub.

Troubleshooting

"API key required" or very slow responses

Without an API key, Etherscan limits you to 1 call per 5 seconds. Get a free key at etherscan.io/apis and set the ETHERSCAN_API_KEY environment variable for 5 calls/sec.

"Rate limit exceeded" (429)

The server auto-retries on 429, but rapid queries can still hit limits. With a free API key, you get 5 calls/sec. Space requests ~200ms apart for best results.

"Contract not found" or empty ABI

Only verified contracts have ABIs on Etherscan. If a contract isn't verified, the API returns an error. Check the contract's verification status on etherscan.io first.

Server won't start

Make sure Node.js 18+ is installed: node --version. If using npx, ensure npm is up to date: npm install -g npm@latest.

MCP client can't connect

Verify the config path is correct. Claude Desktop uses ~/Library/Application Support/Claude/claude_desktop_config.json on macOS and %APPDATA%\Claude\claude_desktop_config.json on Windows. Restart the client after config changes.

"Address checksum" errors

Etherscan expects checksummed addresses (mixed case). The server handles this automatically, but if you see errors, try the checksummed version from etherscan.io.

Requirements

Node.js 18+
Etherscan API key (recommended) — get a free one at etherscan.io/apis

Rate Limits

The server automatically rate-limits requests to ~4 calls/second to stay within Etherscan's free tier (5 calls/sec). Without an API key, Etherscan limits you to 1 call/5 seconds.

To use a higher limit, sign up for a free Etherscan API key and set the ETHERSCAN_API_KEY environment variable:

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

Development

git clone https://github.com/nova/etherscan-mcp-server.git

cd etherscan-mcp-server npm install npm run build npm start

License

MIT

Etherscan MCP Server

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

zanadir

README from the maker

Etherscan MCP Server

What is this?

Why use this?

Tools

Quick Start

1. Add to your MCP client

2. Use it

Example Output

get_eth_balance

get_gas_price

get_transactions_by_address

get_contract_abi

Functions (showing first 25)

Use Cases

Wallet Inspection

Transaction Forensics

Smart Contract Analysis

Gas Optimization

DeFi Portfolio Tracking

Security Auditing

Security

Troubleshooting

"API key required" or very slow responses

"Rate limit exceeded" (429)

"Contract not found" or empty ABI

Server won't start

MCP client can't connect

"Address checksum" errors

Requirements

Rate Limits

Development

License

`get_eth_balance`

`get_gas_price`

`get_transactions_by_address`

`get_contract_abi`