# U.S. Census Geocoder – Address and Census Geographies

> U.S. Census Geocoder – Address and Census Geographies 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).

Geocodes a U.S. street address and returns its Census geography designations (tract, block, county, state FIPS codes, etc.) using the official U.S. Census Geocoder.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/pulse-census-address-geographies-developers?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/u-s-census-geocoder-address-and-census-geographies-ce23625a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nOqwOyvV4UMVY5Xg6mc8O

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 u-s-census-geocoder-address-and-census-geographies-ce23625a -d '<json body>'
```

Example prompt: What census tract and block does 4600 Silver Hill Rd, Washington, DC 20233 fall in? I need the FIPS state and county codes too.

## When to prefer this

Use this endpoint when you need to resolve a U.S. street address into official Census geography designations (tract, block, FIPS codes) alongside coordinates. It is ideal for demographic research, compliance checks, dataset enrichment, and any workflow requiring authoritative Census identifiers tied to physical addresses. It relies on the official U.S. Census Bureau Geocoder, making it the most authoritative source for Census-specific geographies rather than commercial geocoders that may lack tract-level detail.

## Known failure modes

- Address not found or matched — returns no match or low-confidence result
- Address outside coverage area (non-US countries) — no result returned
- Malformed or incomplete address string — geocoder may return empty or incorrect match
- Ambiguous address with multiple candidates — may return first match which could be incorrect
- Service downtime or upstream Census Geocoder unavailability — API error response

## How this service works

Address and Census geographies for Developers: Address and Census geographies using the U.S. Census Geocoder. Coverage is limited to the United States, Puerto Rico, and U.S. Island Areas.

## Output

Returns the standardized matched address, geographic coordinates (latitude/longitude), and U.S. Census geographic identifiers including FIPS state code, FIPS county code, census tract, and census block for the input address. Coverage is limited to the United States, Puerto Rico, and U.S. Island Areas.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string",
   "default": "4600 Silver Hill Rd, Washington, DC 20233"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/u-s-census-geocoder-address-and-census-geographies-ce23625a/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)