Parcel-Data MCP Server

Quick start: Claude Desktop

Open claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/; Windows: %APPDATA%\Claude\) and add or merge in this block:

{
  "mcpServers": {
    "urbankit-atlas": {
      "url": "https://urbankitstudio.com/api/mcp"
    }
  }
}

Restart Claude Desktop. In a fresh conversation ask: "What urbankit-atlas tools do you have?" — Claude will list the six tools it discovered. Try "Find the parcel number for 100 N Lake St in Aurora IL."

Try it from the terminal

The server speaks plain JSON-RPC, so you can hit it with curl to verify connectivity before configuring a client:

curl -X POST https://urbankitstudio.com/api/mcp \
  -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize"}'

The response includes serverInfo, protocolVersion, and a short instructions string Claude reads before deciding which tool to call.

Tools reference

Each tool below is a function the AI can call. Click "Example call" to see the JSON-RPC payload — useful for testing without a client.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "find_parcel_by_address",
    "arguments": {
      "address": "100 N Lake St Aurora IL"
    }
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "geocode_address",
    "arguments": {
      "address": "1600 Pennsylvania Ave NW Washington DC"
    }
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "list_indexed_states",
    "arguments": {}
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "list_counties_in_state",
    "arguments": {
      "state_slug": "illinois"
    }
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "find_county_by_fips",
    "arguments": {
      "fips": "17089"
    }
  }
}

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_county_endpoint",
    "arguments": {
      "state_slug": "illinois",
      "county_slug": "kane-county"
    }
  }
}

What you can ask

• "What's the parcel number for [any U.S. address]?" — Claude calls find_parcel_by_address.
• "Which states does urbankit-atlas cover?" — Claude calls list_indexed_states.
• "What's the county REST endpoint for Kane County, IL?" — Claude calls get_county_endpoint with state and county slugs.
• "I'm holding FIPS 17089, what county is that and what fields does its parcel layer expose?" — Claude calls find_county_by_fips.
• "Geocode 1600 Pennsylvania Ave to FIPS." — Claude calls geocode_address.

Frequently asked questions