Headless Domains Server

Official Model Context Protocol (MCP) server for Headless Domains. This server exposes Headless Domains API operations to MCP-compatible clients such as Claude Desktop, Cursor, and Windsurf.

Features

• search_domain: check whether a domain is available
• lookup_whois: inspect a registered identity
• register_domain: register a domain with an API key
• sync_bio: sync agent/profile bio content with an API key
• Automatic transport selection:
  • stdio for local MCP clients
  • sse when PORT is present for hosted deployments

Requirements

• Python 3.10+
• Optional: a Headless Domains API key for authenticated tools

Local Setup

python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt

Environment Variables

Variable	Required	Default	Purpose
HEADLESSDOMAINS_API_KEY	No	unset	Sends X-API-Key for authenticated endpoints
HEADLESSDOMAINS_API_BASE_URL	No	https://headlessdomains.com/api/v1	Overrides the API base URL
HEADLESSDOMAINS_TIMEOUT	No	20	HTTP timeout in seconds
HEADLESSDOMAINS_REGISTER_PATH	No	/domains/register	Override register endpoint path if the API changes
HEADLESSDOMAINS_SYNC_BIO_PATH	No	/domains/{domain}/bio	Override sync-bio endpoint path if the API changes
MCP_TRANSPORT	No	auto	Force a transport such as stdio or sse
HOST	No	0.0.0.0	Bind host for SSE mode
PORT	No	unset	When present, starts the server in sse mode

Run Locally

For a local MCP client, the server uses stdio by default:

python server.py

You can also run it through the MCP CLI:

mcp run server.py

Claude Desktop Configuration

Add a server entry to claude_desktop_config.json:

{
  "mcpServers": {
    "headlessdomains": {
      "command": "mcp",
      "args": [
        "run",
        "/absolute/path/to/headlessdomains-mcp/server.py"
      ],
      "env": {
        "HEADLESSDOMAINS_API_KEY": "your-api-key-here"
      }
    }
  }
}

If you do not need authenticated tools yet, you can omit HEADLESSDOMAINS_API_KEY.

Hosted SSE Mode

When PORT is present, server.py starts an SSE transport automatically:

PORT=8080 python server.py

Typical Railway-style launch:

HOST=0.0.0.0 PORT=8080 python server.py

Tool Notes

register_domain

• Requires HEADLESSDOMAINS_API_KEY
• Sends a base payload containing domain, namespace, years, agreed_to_terms (true), and payment_method ("gems")
• Accepts extra_payload_json for API fields not hard-coded into the tool

Example:

{
  "domain": "myagent.agent",
  "years": 1,
  "extra_payload_json": "{\"owner_email\":\"[email protected]\"}"
}

sync_bio

• Requires HEADLESSDOMAINS_API_KEY
• Syncs to the /domains/<domain>/bio endpoint
• Sends domain, bio, and bio_markdown
• Accepts extra_payload_json for any additional API fields (like name, x, github, etc.)

Example:

{
  "domain": "myagent.agent",
  "bio_markdown": "# About Me",
  "extra_payload_json": "{\"name\":\"My Agent Name\", \"x\":\"twitter_handle\"}"
}

Docker

Build:

docker build -t headlessdomains-mcp .

Run:

docker run --rm -p 8080:8080 \
  -e PORT=8080 \
  -e HEADLESSDOMAINS_API_KEY=your-api-key-here \
  headlessdomains-mcp

Smoke Testing

After installing dependencies:

python -m py_compile server.py
python - <<'PY'
import server
print(server.search_domain("example.agent"))
print(server.lookup_whois("test.agent"))
PY

Notes

• /temp-specs is ignored in .gitignore so local planning docs stay out of version control.