# FCC Geo Lookup — US County & Census Block FIPS by Lat/Lon

> FCC Geo Lookup — US County & Census Block FIPS by Lat/Lon is a paid API for AI agents from agent402.tools, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Resolves a US latitude/longitude coordinate to its county, state, and census block FIPS code using the FCC Area API.

## Facts

- Endpoint: GET https://agent402.tools/api/geo-lookup
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fcc-geo-lookup-us-county-census-block-fips-by-lat-lon-1505ee30
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bBH7YSbqOEQOex3bTyWzL

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 fcc-geo-lookup-us-county-census-block-fips-by-lat-lon-1505ee30
```

Example prompt: What county and census block FIPS code is the location at latitude 34.0522, longitude -118.2437 in?

## When to prefer this

Use this endpoint when you need authoritative US county, state, or census block FIPS data for a given coordinate — especially for regulatory, compliance, or demographic workflows that require official government-sourced geographic identifiers. Prefer over commercial geocoding APIs when FIPS codes and census block granularity are required and no API key is available.

## Known failure modes

- Coordinates outside the US return no result or an error
- Invalid lat/lon range (lat outside -90..90 or lon outside -180..180) returns a validation error
- FCC API upstream downtime causes timeout or empty response
- Non-numeric lat/lon values cause a bad request error

## How this service works

Resolve a US latitude/longitude to its county, state and census block FIPS codes via the FCC Area API. Use it when an agent has coordinates and needs the administrative geography (jurisdiction, county, census block) - live government data, no key.

## Output

Returns the county name, state, and census block FIPS code for the given US coordinate, sourced live from the FCC Area API with no authentication required.

## 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 (-90..90)"
      },
      "lon": {
       "type": "number",
       "description": "Longitude (-180..180)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "lat",
      "lon",
      "county",
      "state",
      "stateName",
      "blockFips",
      "source"
     ],
     "properties": {
      "lat": {
       "type": "number"
      },
      "lon": {
       "type": "number"
      },
      "state": {
       "type": "string"
      },
      "county": {
       "type": "string"
      },
      "source": {
       "type": "string"
      },
      "blockFips": {
       "type": "string"
      },
      "stateName": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "lat": 34.0522,
  "lon": -118.2437,
  "state": "CA",
  "county": "Los Angeles County",
  "source": "geo.fcc.gov (public domain)",
  "blockFips": "060372074001024",
  "stateName": "California"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fcc-geo-lookup-us-county-census-block-fips-by-lat-lon-1505ee30/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)