Name: National Register Historic Properties
Creator: National Register of Historic Places unrestricted GIS

API access

Your AI client reaches National Register Historic Properties through one ParcelOps MCP endpoint, so there is no separate key to hold for it and no per-source client to write. Reaching it takes no credentials of your own.

Set up National Register Historic Properties in Claude, ChatGPT, or Cursor Get every fact on this page as JSON

Where it came from

PublisherNational Register of Historic Places unrestricted GIS

Sourcehttps://mapservices.nps.gov/arcgis/rest/services/cultural_resources/nrhp_locations/MapServer

API basehttps://mapservices.nps.gov/arcgis/rest/services/cultural_resources/nrhp_locations/MapServer

Docshttps://home.nps.gov/subjects/nationalregister/data-downloads.htm

Freshness and coverage

FreshnessScheduled · The official point and polygon layers are queried live.

Places coveredUnited States unrestricted National Register records

Time coveredNot declared

CredentialsNo credentials required

What this source cannot tell you

⚠ Anything outside United States unrestricted National Register records. A request past that edge comes back empty rather than approximated.
⚠ Which years it spans, because the covered period is not declared.
⚠ Anything National Register of Historic Places unrestricted GIS does not publish. ParcelOps returns this source as it stands and never fills a blank field from a different one.
⚠ Coordinates and boundaries can be approximate and restricted records are omitted.
⚠ Local landmarks are separate, and this screen does not replace Section 106 or local preservation review.

Methods (2)

A method is one call your agent can make against this source.

searchHistoricProperties

read

Search unrestricted records by identifier, text, geography, or spatial selector.

FreshnessScheduled (source-level)

Input schema

{
  "type": "object",
  "properties": {
    "layer": {
      "type": "string",
      "enum": [
        "points",
        "polygons"
      ]
    },
    "state": {
      "type": "string",
      "pattern": "^[A-Za-z]{2}$"
    },
    "referenceNumber": {
      "type": "string",
      "minLength": 1,
      "maxLength": 40
    },
    "text": {
      "type": "string",
      "minLength": 2,
      "maxLength": 160
    },
    "bbox": {
      "type": "array",
      "description": "[west, south, east, north] in WGS84. At most 2 degrees per side.",
      "minItems": 4,
      "maxItems": 4,
      "items": {
        "type": "number"
      }
    },
    "point": {
      "type": "object",
      "properties": {
        "latitude": {
          "type": "number",
          "minimum": -90,
          "maximum": 90
        },
        "longitude": {
          "type": "number",
          "minimum": -180,
          "maximum": 180
        },
        "radiusMiles": {
          "type": "number",
          "minimum": 0.1,
          "maximum": 25
        }
      },
      "required": [
        "latitude",
        "longitude",
        "radiusMiles"
      ],
      "additionalProperties": false
    },
    "includeGeometry": {
      "type": "boolean"
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 100
    },
    "offset": {
      "type": "integer",
      "minimum": 0,
      "maximum": 20000
    }
  },
  "required": [],
  "additionalProperties": false
}

getServiceInfo
read
Return layers, update semantics, field policy, spatial limits, and review caveats.
FreshnessScheduled (source-level)
Input schema
```
{
  "type": "object",
  "properties": {},
  "required": [],
  "additionalProperties": false
}
```

Where this source is used

Land research
Parcel records, ground conditions, and what reaches the property line, for raw and rural land.
Data center siting
Power, water, transport, airspace, and hazard screening for a site before anyone signs anything.
Commercial real estate
Parcel and assessment records, building programs, and the entity on the other side of the deal.
Residential real estate
The parcel record, the housing programs that touch an address, and the conditions a buyer asks about.
Real estate law
Federal rule text, rulemaking dockets, party records, and the property facts a filing has to state.
Realtors and brokerages
The facts behind a listing, the programs a buyer may qualify for, and your own files in the same place.

National Register Historic Properties API and MCP server