# Land Survey Site Screen (US Coordinate)

> Land Survey Site Screen (US Coordinate) is a paid API for AI agents from land-survey.x402tookit.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-30).

Returns a combined first-look site screening for a US lat/lon: ground elevation, FEMA flood zone classification, and mapped wetland presence, with plain-language verdict flags.

## Facts

- Endpoint: GET https://land-survey.x402tookit.com/site-screen?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/land-survey-site-screen-us-coordinate-3beeeddb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sIOigtidXQUZNxaO1O0ho

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability land-survey-site-screen-us-coordinate-3beeeddb
```

Example prompt: Can you run a quick site screen on the coordinates 36.1627° N, 86.7816° W — I need to know the elevation, whether it's in a FEMA flood zone, and if there are any mapped wetlands on or near the site?

## When to prefer this

Choose this endpoint when you need a fast, combined first-look screen of a US coordinate covering elevation, flood zone, and wetland presence in a single call rather than querying each layer separately. It is ideal for pre-purchase due diligence, permitting pre-checks, or triage workflows where you want a verdict and flags without orchestrating three separate API calls. Prefer the individual sibling endpoints (flood-only, elevation-only, wetland-only) when you need deeper detail on a single layer.

## Known failure modes

- Coordinates outside the US return null or incomplete data for FEMA and elevation layers
- Degraded flag set to true when one or more data sources returned partial or stale data
- notChecked array populated when a data layer (flood, wetland, or elevation) could not be queried
- Invalid lat/lon values result in a 4xx error
- USGS or FEMA upstream service outages may cause missing elevation or flood data

## How this service works

First-look site screen for a US coordinate: elevation, FEMA flood zone and mapped wetlands combined, with flags.

## Output

Returns a JSON object with: ground elevation in feet, FEMA flood zone code and class, base flood elevation, special flood hazard area boolean, wetland presence data, a plain-language summary, a verdict string, human-readable flags array, reasons list, data-degraded indicator, source attribution URL, and a disclaimer. Includes a notChecked array listing any data layers that could not be retrieved.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "lat",
      "lon"
     ],
     "properties": {
      "lat": {
       "type": "number",
       "description": "Latitude"
      },
      "lon": {
       "type": "number",
       "description": "Longitude"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "lat": {
       "type": [
        "null",
        "number"
       ]
      },
      "lon": {
       "type": [
        "null",
        "number"
       ]
      },
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "flags": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "flood": {
       "type": [
        "null",
        "object"
       ],
       "properties": {
        "zone": {
         "type": [
          "null",
          "string"
         ]
        },
        "class": {
         "type": [
          "null",
          "string"
         ]
        },
        "baseFloodElevationFeet": {
         "type": [
          "null",
          "number"
         ]
        },
        "specialFloodHazardArea": {
         "type": [
          "boolean",
          "null"
         ]
        }
       }
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "wetland": {},
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "sourceUrl": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
 
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/land-survey-site-screen-us-coordinate-3beeeddb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from land-survey.x402tookit.com](https://www.zero.xyz/host/land-survey.x402tookit.com/llms.txt)