# Address Census Tract Context Lookup

> Address Census Tract Context Lookup is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Returns U.S. Census tract and geographic context for a given U.S. address using the Census Geocoder API.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/pulse-census-tract-context-developers?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/address-census-tract-context-lookup-2c506439
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__v1cNlBNHvZyMqzcgkOun

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 address-census-tract-context-lookup-2c506439 -d '<json body>'
```

Example prompt: What census tract is 4600 Silver Hill Rd, Washington, DC 20233 in? I need the full geographic context including FIPS codes and block group.

## When to prefer this

Use this endpoint when you need Census Bureau-official tract identifiers for a U.S. address, particularly for compliance workflows (e.g. CRA, HMDA), demographic enrichment, or public health geographic analysis. Prefer this over general geocoders when census-specific identifiers (tract, block group, FIPS codes) are the primary output needed rather than lat/lng coordinates.

## Known failure modes

- Address not found or not geocodable — returns null or error result
- Address outside supported coverage (non-US, non-PR, non-Island Area territory) — not supported
- Malformed address string — may return no match or ambiguous result
- Census Geocoder API downtime — service unavailable error

## How this service works

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

## Output

Returns census geographic context for the input address including census tract number, FIPS state and county codes, block group, and other Census Geocoder geographic identifiers. Coverage includes 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/address-census-tract-context-lookup-2c506439/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)