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Ens MCP Server

An MCP server for Ethereum Name Service resolutions

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Devtools

Installation

npx ens-mcp-server

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Documentation

MCP Server Demo

This project demonstrates a Model Context Protocol (MCP) server implementation that provides Ethereum Name Service (ENS) lookup functionality. It's built using the MCP SDK and provides a simple HTTP server with Server-Sent Events (SSE) support.

Features

ENS name resolution (address → name)
ENS address lookup (name → address)
Server-Sent Events (SSE) for real-time communication
Express.js HTTP server

Available Tools

The server provides two main tools:

get-ens-name: Resolves an Ethereum address to its associated ENS name
- Input: Ethereum address (format: 0x...)
- Output: ENS name or "No ENS name found"
get-ens-address: Looks up the Ethereum address for an ENS name
- Input: ENS name (e.g., "vitalik.eth")
- Output: Ethereum address or "No ENS address found"

Technical Stack

@modelcontextprotocol/sdk - MCP SDK for server implementation
Express.js - Web server framework
Viem - Ethereum interaction library
Zod - Runtime type validation

Getting Started

Install dependencies:
```
npm install
```
Build the server:
```
npm run build
```
Start the server:
```
npm run start
```

The server will start on port 8080.

API Endpoints

GET /sse - Establishes an SSE connection
POST /messages - Handles incoming messages/requests