# FEMA Flood Zone Lookup by Coordinate

> FEMA Flood Zone Lookup by Coordinate is a paid API for AI agents from land-survey.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Returns the FEMA flood hazard zone classification (high-risk A/AE/V, moderate, or minimal) and base flood elevation for a given US latitude/longitude.

## Facts

- Endpoint: GET https://land-survey.x402tookit.com/flood-zone?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fema-flood-zone-lookup-by-coordinate-a685a120
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uLjkmOqgR7E5yFf0-MCF8

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 fema-flood-zone-lookup-by-coordinate-a685a120
```

Example prompt: Is the property at 29.9511° N, 90.0715° W in a high-risk FEMA flood zone, and what's the base flood elevation there?

## When to prefer this

Choose this endpoint when you need authoritative FEMA flood zone classification (zone code, SFHA flag, base flood elevation) for a specific US coordinate, especially for real estate due diligence, construction permitting, flood insurance determination, or environmental site screening. It is distinct from general elevation lookups and returns FEMA-specific regulatory zone data rather than terrain elevation. For a combined first-look screen including elevation and wetlands, consider the sibling composite endpoint instead.

## Known failure modes

- Coordinates outside the United States return no data or an error
- Location not yet mapped in the NFHL returns null zone fields or degraded=true
- Invalid lat/lon values (out of range) cause a validation error
- FEMA data service temporarily unavailable results in a degraded or error response
- Coastal or recently remapped areas may have stale zone designations flagged by asOf date

## How this service works

FEMA flood hazard zone at a US latitude and longitude: high-risk (A/AE/V), moderate or minimal, with base flood elevation.

## Output

Returns a JSON object containing the flood zone code (e.g. AE, X, V), zone subtype, whether the location is within a Special Flood Hazard Area (boolean), base flood elevation in feet, number of overlapping zones, a plain-English verdict and summary, the data source URL, the as-of date of the data, and a disclaimer. May also include a list of reasons and a degraded flag if data coverage is partial.

## 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"
       ]
      },
      "zone": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "sourceUrl": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "zoneSubtype": {},
      "overlappingZones": {
       "type": [
        "null",
        "number"
       ]
      },
      "baseFloodElevationFeet": {
       "type": [
        "null",
        "number"
       ]
      },
      "specialFloodHazardArea": {
       "type": [
        "boolean",
        "null"
       ]
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fema-flood-zone-lookup-by-coordinate-a685a120/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)