# US Address Geocoder (Census)

> US Address Geocoder (Census) is a paid API for AI agents from bess-x402.onrender.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-30).

Geocodes a US street address using the Census Bureau geocoder, returning standardized address, lat/lon coordinates, ZIP, county, census tract and block, city, metro area, and congressional district with FIPS/GEOIDs.

## Facts

- Endpoint: GET https://bess-x402.onrender.com/v1/geo/us-address?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-address-geocoder-census-198771e9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_t7e2x74GTDaBkLQYqFRv4

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 us-address-geocoder-census-198771e9
```

Example prompt: Can you geocode '1600 Pennsylvania Avenue NW, Washington DC 20500' and give me the coordinates, census tract, county, and congressional district?

## When to prefer this

Choose this endpoint when you need authoritative US Census-aligned geographic identifiers (FIPS codes, census tracts, blocks, GEOIDs) alongside coordinates — especially for demographic analysis, regulatory compliance, voter district identification, or any workflow requiring official Census Bureau geography. Prefer this over commercial geocoders when Census-specific attributes (tract, block, congressional district) are required and when cost efficiency matters at $0.002 per call.

## Known failure modes

- Address not found in Census database — returns no match result
- Ambiguous or incomplete address input may return multiple candidate matches or no match
- Non-US addresses will not be geocoded
- Malformed or missing address parameter returns a 400/validation error
- Render.com cold-start latency may cause occasional slow responses

## How this service works

Match a US street address with the Census Bureau geocoder: standardized address, coordinates, ZIP, county, census tract and block, city, metro area and congressional district with FIPS/GEOIDs.

## Output

Returns a standardized US street address, latitude/longitude coordinates, ZIP code, county name and FIPS code, census tract and block GEOIDs, city name, metropolitan statistical area (MSA), and congressional district — all derived from the US Census Bureau geocoder.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "US street address in one line"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-address-geocoder-census-198771e9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bess-x402.onrender.com](https://www.zero.xyz/host/bess-x402.onrender.com/llms.txt)