ATTOM API MCP Server

An MCP server for the ATTOM API, providing real estate data via the MCP protocol. This server acts as middleware, exposing the ATTOM API endpoints as MCP tools that can be used by AI agents.

Features

• MCP interface for ATTOM API endpoints
• Comprehensive API coverage for property data, valuations, assessments, and sales
• Structured error handling and logging
• Configurable via environment variables
• Packaged as a Python CLI tool for easy deployment

Prerequisites

• Python 3.11 or higher
• uv for dependency management
• An ATTOM API key

Installation

Using UVX (Recommended)

The easiest way to install and run the ATTOM API MCP Server is via uvx:

uvx mcp-server-attom --help

This will download and run the tool directly without requiring a permanent installation.

To install it permanently:

uv tool install mcp-server-attom

Local Development

1. Clone this repository:

git clone https://github.com/nkbud/mcp-server-attom.git
cd mcp-server-attom

2. Install dependencies:

uv sync --locked --all-extras --dev

3. Create a .env file with your ATTOM API key:

cp .env.example .env
# Edit .env and add your ATTOM API key

Usage

MCP Client Integration

For detailed instructions on using this server with various MCP clients (Claude Desktop, mcp-inspector, mcp-cli) and stdio communication, see the Client Integration Guide.

Quick Start Examples:

# With Claude Desktop - add to configuration file
{
  "mcpServers": {
    "attom-api": {
      "command": "uvx",
      "args": ["mcp-server-attom"],
      "env": {"ATTOM_API_KEY": "your_api_key_here"}
    }
  }
}

# With MCP Inspector
npx @modelcontextprotocol/inspector uvx mcp-server-attom

# With MCP CLI
mcp list tools uvx mcp-server-attom
mcp call uvx mcp-server-attom property_detail '{"attom_id": "145423726"}'

# Direct stdio communication
export ATTOM_API_KEY=your_api_key_here
uvx mcp-server-attom

Running as a CLI Tool

Start the server using the mcp-server-attom command:

# If installed via uv tool install
mcp-server-attom --port 8000 --host 0.0.0.0

# Or run directly via uvx
uvx mcp-server-attom --port 8000 --host 0.0.0.0

Available command-line options:

• --host: Host to bind the server to (default: 0.0.0.0)
• --port: Port to bind the server to (default: 8000)
• --log-level: Logging level (debug, info, warning, error)
• --reload: Enable auto-reload on code changes

Running Locally During Development

Start the server during development:

python -m src.server

This will start the server using stdio transport for MCP communication.

Making Requests

The server exposes MCP tools for various ATTOM API endpoints. Here's an example of using the property_detail tool:

await mcp.tools.property_detail(
    attom_id="145423726"  # OR
    # address="123 Main St, New York, NY 10001"  # OR
    # address1="123 Main St", address2="New York, NY 10001"  # OR
    # fips="36061", apn="12345"
)

Configuration

The server can be configured using the following environment variables:

Variable	Description	Required	Default
ATTOM_API_KEY	Your ATTOM API key	Yes	-
ATTOM_HOST_URL	Base URL for the ATTOM API	No	https://api.gateway.attomdata.com
ATTOM_PROP_API_PREFIX	Prefix for property API endpoints	No	/propertyapi/v1.0.0
ATTOM_DLP_V2_PREFIX	Prefix for DLP v2 API endpoints	No	/property/v2
ATTOM_DLP_V3_PREFIX	Prefix for DLP v3 API endpoints	No	/property/v3
LOG_LEVEL	Logging level (DEBUG, INFO, WARNING, ERROR)	No	INFO
LOG_FORMAT	Log format (json or console)	No	json

Available Tools

This MCP server provides complete 1:1 coverage of ATTOM's Data API with 55+ endpoints across all major categories. For detailed API coverage mapping, see ATTOM_API_COVERAGE.md.

Core Categories

• Property Tools (14 endpoints): Address lookup, property details, profiles, building permits, sales history
• Assessment Tools (3 endpoints): Assessment details, snapshots, and history
• Sale Tools (6 endpoints): Sales details, history, comparables, and trends analysis
• Valuation Tools (6 endpoints): AVM data, home equity, rental valuations
• Area & Location Tools (8 endpoints): Geographic boundaries, hierarchy lookups, CBSA data
• POI Tools (2 endpoints): Points of interest search with 14+ business categories
• Community Tools (1 endpoint): Comprehensive neighborhood data (crime, population, education, weather, commute times)
• School Tools (3 endpoints): School profiles, districts, and search functionality
• Event Tools (2 endpoints): Property events and snapshots
• Utility Tools (3 endpoints): Field definitions, transportation noise, preforeclosure data

Tool Parameters

All property-related tools support multiple identification methods:

• AttomID: Direct property identifier
• Address: Full property address string
• Address1 + Address2: Split address format (street + city/state/zip)
• FIPS + APN: County FIPS code + Assessor Parcel Number

Area and location tools support geographic identifiers:

• GeoIDv4: Version 4 geographic identifiers
• Latitude/Longitude: Coordinate-based searches
• WKT Strings: Well-Known Text geometric representations
• Radius: Search radius for location-based queries

Development

Running Tests

uv run pytest

Linting

uv run ruff check .
uv run black .
uv run isort .

Building and Publishing

To build and publish the package to PyPI:

1. Ensure you have the latest version of uv:

pip install -U uv

2. Set up a PyPI token:

   • Create an account on PyPI if you don't have one
   • Go to Account Settings > API Tokens
   • Create a token with scope restricted to the mcp-server-attom project
   • Save the token securely

3. Build the package:

uv build --no-sources

4. Publish the package using your PyPI token:

uv publish --token YOUR_PYPI_TOKEN

Alternatively, you can store your token in a .pypirc file or as an environment variable:

export PYPI_TOKEN=YOUR_PYPI_TOKEN
uv publish

License

MIT

Support

For issues with this MCP server, please open an issue on the GitHub repository.

For issues with the ATTOM API itself, please contact ATTOM Data Solutions support.