ATTOM Data MCP

Single-tenant MCP server wrapping the ATTOM Property Data API. Property profiles, AVMs, sales history, assessments, comparables, school + neighborhood data, and more — 47 tools across the full ATTOM endpoint surface.

Server URL: https://attom.nlma.io/mcp
Auth: OAuth 2.1 (Dynamic Client Registration + PKCE) gated by an operator password.
Operator: Forrest Surprenant / FIDUM — single-tenant.

This server is single-tenant. The OAuth flow asks for an operator password — if you don't have it, this connector isn't for you. The flow itself works on any MCP client that supports the standard OAuth handshake (claude.ai, ChatGPT, Claude Code, Claude Desktop, VS Code).

Claude.ai (Pro / Max / Team / Enterprise)

Settings → Connectors → Add custom connector.
Name: ATTOM. Remote MCP server URL: https://attom.nlma.io/mcp.
Click Add, then Connect. You'll be redirected here to enter the operator password.

ChatGPT (Pro / Business / Enterprise)

Settings → Connectors → Create.
Name: ATTOM. MCP Server URL: https://attom.nlma.io/mcp. Authentication: OAuth.

Claude Code (CLI)

claude mcp add --transport http attom https://attom.nlma.io/mcp

On first tool invocation, Claude Code opens the OAuth flow in your browser.

Claude Desktop

Edit claude_desktop_config.json (Settings → Developer → Edit Config):

{
  "mcpServers": {
    "attom": {
      "command": "npx",
      "args": [
        "-y", "mcp-remote",
        "https://attom.nlma.io/mcp"
      ]
    }
  }
}

mcp-remote bridges the HTTP transport to Claude Desktop's stdio and handles the OAuth flow. Restart Claude Desktop after editing.

VS Code (Copilot Chat / Agent mode)

Create .vscode/mcp.json in your workspace:

{
  "servers": {
    "attom": {
      "type": "http",
      "url": "https://attom.nlma.io/mcp"
    }
  }
}

What's available

Category	Endpoints	Use case
Property	14	Address lookup, basic / expanded profile, building permits, sales history
Sale	6	Details, history, comparables, trends
Valuation	6	AI-AVM, home equity, rental AVM
Assessment	3	Tax, owner of record, mortgage
Area & location	8	Boundaries, hierarchy, CBSA
POI	2	Points of interest within radius
Community	1	Crime, demographics, education, weather, commute
School	3	School profiles, districts, attendance
Event	2	Property events & snapshots
Utility	3	Field defs, noise scores, preforeclosure

Compliance notes

Responses are cached for up to 24 hours (matches ATTOM TOS ceiling).
No persistent storage of ATTOM content — in-memory only.
No redistribution outside the single-tenant operator's workflow.
Coverage: ATTOM Data Solutions, ~99% of US population / 155M+ parcels. Mid-Atlantic counties (DC/MD/VA/DE/PA/NJ/WV) fully covered.

Source: nkbud/mcp-server-attom (FIDUM fork). Stack: Python · FastMCP 3.x · OAuth 2.1 (DCR + PKCE) · 24h TTL cache.