UrbanKit County Parcel Atlas

mcp-atlas MCP server

Query 155 verified US county parcel ArcGIS REST endpoints for owner, APN, and address lookup via the Model Context Protocol (MCP).

An MCP server that gives AI assistants direct access to UrbanKit Studio's atlas of manually verified county parcel GIS services. Ask Claude or Cursor to find the ArcGIS REST endpoint for any covered county, get the exact owner-search query URL, and look up parcel data — without needing to know anything about ArcGIS REST API conventions.

Coverage: 155 counties across all 50 US states.

---

Quick start

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "mcp-atlas": {
      "command": "npx",
      "args": ["-y", "@urbankitstudio/mcp-atlas"]
    }
  }
}

Cursor

Add to .cursor/mcp.json in your project root (or ~/.cursor/mcp.json globally):

{
  "mcpServers": {
    "mcp-atlas": {
      "command": "npx",
      "args": ["-y", "@urbankitstudio/mcp-atlas"]
    }
  }
}

Install globally (optional)

npm install -g @urbankitstudio/mcp-atlas

Then use mcp-atlas as the command instead of npx -y @urbankitstudio/mcp-atlas.

---

Tools

list_counties

Lists all counties with a verified parcel REST endpoint.

Parameter	Type	Required	Description
state	string	No	Two-letter abbreviation (IL) or full name (Illinois)

Example prompt: "List all covered counties in Illinois"

Example output:

ST | County               | Slug                     | Coverage
--------------------------------------------------------------------
IL | Kane                 | kane-county              | owner+APN
IL | Cook                 | cook-county              | APN only
IL | DuPage               | dupage-county            | owner+APN
...

---

find_county

Fuzzy-matches a county by name or 5-digit FIPS code. Returns endpoint URLs, searchable field names, owner field, sample query, and license info.

Parameter	Type	Required	Description
query	string	Yes	County name (Kane), name+state (Kane IL), or FIPS (17089)

Example prompt: "Find the parcel endpoint for Kane County Illinois"

---

get_parcel_endpoint

Returns the full ArcGIS REST URL, layer index, searchable fields, owner field, and a ready sample ?where=…&f=json query for a specific county.

Parameter	Type	Required	Description
state	string	Yes	Two-letter abbreviation or full name
county	string	Yes	County name (Kane or Kane County)

Example prompt: "Give me the ArcGIS REST endpoint for Cook County Illinois"

---

build_owner_query

Constructs the exact ArcGIS REST query URL using the county's verified owner/taxpayer field. Uses UPPER(field) LIKE UPPER('%NAME%') — case-insensitive partial match.

Parameter	Type	Required	Description
state	string	Yes	Two-letter abbreviation or full name
county	string	Yes	County name
owner_name	string	Yes	Owner/taxpayer name (partial match)

Example prompt: "Build an ArcGIS query for properties owned by 'Smith' in Kane County IL"

Example output:

County:       Kane, Illinois
Owner field:  TaxName
WHERE clause: UPPER(TaxName) LIKE UPPER('%SMITH%')

Query URL:
https://gistech.countyofkane.org/arcgis/rest/services/KanePINList/MapServer/0/query
  ?where=UPPER(TaxName)%20LIKE%20UPPER('%25SMITH%25')
  &outFields=PIN,TaxName,SiteAddress,SiteCity,MailingAddress
  &returnGeometry=false&f=json&resultRecordCount=25

---

Example conversation

User: I'm doing due diligence on properties in Kane County, Illinois. Can you find all parcels owned by "Blackstone"?

Claude (using mcp-atlas):

1. Calls get_parcel_endpoint → gets the gistech.countyofkane.org URL and confirms the owner field is TaxName
2. Calls build_owner_query with owner_name=Blackstone → returns a ready fetch URL
3. Optionally fetches the URL and formats the parcel results

---

Atlas coverage

The atlas is maintained by UrbanKit Studio. All endpoints are manually verified. Counties with an owner/taxpayer field support full name-based lookups; PIN-only counties support APN/parcel-number queries.

Full coverage map: https://urbankitstudio.com/parcel-atlas

---

Data

Atlas data is embedded in the package (no network calls at startup). The underlying @urbankitstudio/atlas SDK is also published separately for programmatic use.

---

License

MIT — © Leo Yong / UrbanKit Studio