# Coordinates to Census Geography (U.S. Census Geocoder)

> Coordinates to Census Geography (U.S. Census Geocoder) is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Converts latitude/longitude coordinates to U.S. Census geographic identifiers (e.g. tract, block, county, state) using the U.S. Census Bureau Geocoder.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/pulse-census-reverse-census-geography-agent-builders?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coordinates-to-census-geography-u-s-census-geocoder-7726f94f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fGvz1nQ2WBRwRaGlZ1caY

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 coordinates-to-census-geography-u-s-census-geocoder-7726f94f -d '<json body>'
```

Example prompt: What U.S. Census tract and block does latitude 38.9047, longitude -77.0164 fall in? I need the full census geography breakdown for that point.

## When to prefer this

Choose this endpoint when you need authoritative U.S. Census geographic identifiers (FIPS codes, tract, block) from a latitude/longitude coordinate — especially for demographic research, federal compliance reporting, or enriching location data with Census geography. It wraps the official U.S. Census Geocoder, so results are authoritative for U.S. domestic geographies. Not suitable for non-U.S. locations.

## Known failure modes

- Coordinates outside U.S., Puerto Rico, or U.S. Island Areas return no results or an error
- Invalid latitude/longitude values (out of range) may return a 400 error
- Coordinates in bodies of water or uninhabited areas may not map to a census block
- Service may be slow or unavailable if the upstream Census Geocoder API is down

## How this service works

Coordinates to Census geography for Agent builders: Coordinates to Census geography using the U.S. Census Geocoder. Coverage is limited to the United States, Puerto Rico, and U.S. Island Areas.

## Output

Returns U.S. Census geographic identifiers for the given coordinates, including state, county, census tract, and census block FIPS codes, along with geographic boundary metadata. Coverage is limited to the United States, Puerto Rico, and U.S. Island Areas.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "latitude": {
   "type": "number",
   "default": 38.9047
  },
  "longitude": {
   "type": "number",
   "default": -77.0164
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coordinates-to-census-geography-u-s-census-geocoder-7726f94f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)