ENS Registration Agent - MCP Server

An MCP server that exposes ENS registration capabilities to other AI agents.

Status: MVP Complete

All three core MCP tools are implemented and tested:

• checkAvailability - Check if an ENS name is available
• getRegistrationPrice - Get the price for registering an ENS name
• registerName - Register an ENS name (commit-reveal process)

Quick Start

Prerequisites

• Deno 2.x

Run Tests

deno task test

Start MCP Server

# Copy and configure environment
cp .env.example .env
# Edit .env with your RPC_URL and optionally PRIVATE_KEY

# Start the server
deno task dev

Configure with Claude Desktop

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "ens-agent": {
      "command": "deno",
      "args": [
        "run",
        "--allow-net",
        "--allow-env",
        "--allow-read",
        "/path/to/montevideo/src/main.ts"
      ],
      "env": {
        "NETWORK": "mainnet",
        "RPC_URL": "https://eth-mainnet.g.alchemy.com/v2/YOUR_API_KEY"
      }
    }
  }
}

MCP Tools

checkAvailability

Check if an ENS name is available for registration.

Input:

• name (string): ENS name (must end with .eth)

Output:

{ "name": "example.eth", "available": true }

getRegistrationPrice

Get the price for registering an ENS name.

Input:

• name (string): ENS name (must end with .eth)
• years (number, default: 1): Registration duration

Output:

{
  "name": "example.eth",
  "years": 1,
  "baseWei": "3155760000000000",
  "premiumWei": "0",
  "totalWei": "3155760000000000",
  "totalEth": "0.00315576"
}

registerName

Register an ENS name. Requires PRIVATE_KEY environment variable.

Input:

• name (string): ENS name (must end with .eth)
• years (number, default: 1): Registration duration
• owner (string): Owner - accepts Ethereum address (0x...) or any ENS-resolvable name

Output:

{
  "success": true,
  "name": "example.eth",
  "owner": "0x...",
  "durationSeconds": 31536000,
  "commitTxHash": "0x...",
  "registerTxHash": "0x..."
}

Environment Variables

Variable	Required	Description
NETWORK	No	mainnet (default) or sepolia
RPC_URL	No	RPC endpoint (uses public if not set)
PRIVATE_KEY	For registerName	Wallet private key for transactions

Tech Stack

• Runtime: Deno 2.x
• ENS: @ensdomains/ensjs v4 + viem v2
• MCP: @modelcontextprotocol/sdk v1
• Testing: Deno's built-in test runner

Project Structure

ens-registration-agent/
├── deno.json           # Deno config + imports
├── .env.example        # Required env vars
├── src/
│   ├── main.ts         # MCP server entry point
│   └── ens/
│       ├── client.ts   # ENS client setup
│       ├── availability.ts
│       ├── pricing.ts
│       ├── registration.ts
│       └── utils.ts
└── tests/
    ├── availability.test.ts
    ├── pricing.test.ts
    └── registration.test.ts

Development with Devcontainer

For isolated development where Claude Code can run with --dangerously-skip-permissions:

1. Open in VS Code/Cursor → "Reopen in Container"
2. Inside the container, run: claude --dangerously-skip-permissions

The container includes Deno, Foundry (cast), GitHub CLI, and Claude Code. No secrets (like PRIVATE_KEY) are mounted — only non-sensitive config. ENS registrations should be done from the host.

Browser testing: To give the container access to Chrome on your host:

# On host
./scripts/launch-chrome-debug.sh
# From container, connect to host.docker.internal:9222

Contributing

Follow TDD (Test-Driven Development) with small, atomic commits:

1. Write a failing test → commit
2. Make the test pass → commit
3. Refactor if needed → commit

Each commit should be independently revertible. Keep changes small and focused.

Commit messages

• test: add failing test for X
• feat: implement X
• refactor: extract Y into Z
• fix: handle edge case in X
• chore: update dependencies

Next Steps

• x402 payment integration for charging callers
• Test on Ethereum mainnet
• Deploy (Coolify at https://ens-registration.oskamai.com)
• ENS name for the agent (ens-registration-agent.ses.eth)
• Add to ERC-8004 registry (Base #19151, Mainnet #26433)
• Marketing — list on directories (see below)
• Extend existing names feature
• Base names / Celo names support
• Name suggestions

Agent Directories & Registries

• ERC-8004 — on-chain agent registry (Ethereum, Base, BNB Chain)
• agent.ai — professional network for AI agents
• AI Agents Directory — 2,100+ agents, 73+ categories
• awesome-ai-agents — popular GitHub list
• AI Agent Store — marketplace with free listing
• TrillionAgent — free to submit
• Google Cloud Agent Finder — Google's directory

Resources

• ENS Documentation
• MCP Protocol
• x402 Payments
• ERC-8004