# Saylor Innovations US Census Geocoder

> Saylor Innovations US Census Geocoder is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Geocodes a US street address using the Census Bureau, returning matched address, lat/lon coordinates, state/county FIPS codes, census tract, block, and congressional district

## Facts

- Endpoint: GET https://saylorinnovations.com/api/geocode/us-census?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-us-census-geocoder-73549035
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OBnBtW_c7Tlq5wwT9zZ-a

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 saylor-innovations-us-census-geocoder-73549035
```

Example prompt: What are the lat/lon coordinates, census tract, and congressional district for 1600 Pennsylvania Ave NW, Washington DC?

## When to prefer this

Choose this endpoint when you need authoritative US Census Bureau-backed geocoding that also returns census geography identifiers (tract, block, FIPS codes) and congressional districts alongside coordinates. It is ideal for compliance workflows, demographic analysis, voter/political district lookups, and address enrichment pipelines that require official census geographies rather than just lat/lon. Prefer over general-purpose geocoders when census tract or FIPS codes are explicitly required.

## Known failure modes

- Address not found or unrecognized — lat/lon and census fields return null
- Ambiguous address with multiple matches — primary match returned with other_matches count > 0
- Non-US address submitted — no match returned
- Malformed or incomplete address string — query echoed back with null geographic fields
- Service unavailable — HTTP error response

## How this service works

US street address geocoder from the Census Bureau - matched address, lat/lon, state and county FIPS, census tract, block and congressional district

## Output

Returns the matched/standardized address string, decimal latitude and longitude, state and county objects with FIPS codes, census tract details, census block identifier, congressional district, parsed address components, data source attribution, and a count of other lower-ranked candidate matches.

## 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": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "Full US street address, e.g. 1600 Pennsylvania Ave NW Washington DC"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "query",
      "matched_address"
     ],
     "properties": {
      "lat": {
       "type": [
        "number",
        "null"
       ],
       "description": "Latitude in decimal degrees"
      },
      "lon": {
       "type": [
        "number",
        "null"
       ],
       "description": "Longitude in decimal degrees"
      },
      "query": {
       "type": "string",
       "description": "The query as the server interpreted it"
      },
      "state": {
       "type": [
        "object",
        "null"
       ],
       "description": "State or region"
      },
      "county": {
       "type": [
        "object",
        "null"
       ],
       "description": "County"
      },
      "source": {
       "type": "string",
       "description": "Data source the values come from"
      },
      "components": {
       "type": "object",
       "description": "Component values"
      },
      "census_block": {
       "type": [
        "string",
        "null"
       ],
       "description": "Census block"
      },
      "census_tract": {
       "type": [
        "object",
        "null"
       ],
       "description": "Census tract"
      },
      "other_matches": {
       "type": "number",
       "description": "Other candidates that matched the query, lower ranked"
      },
      "matched_address": {
       "type": "string",
       "description": "Matched address"
      },
      "congressional_district": {
       "type": [
        "string",
        "null"
       ],
       "description": "Congressional district"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-us-census-geocoder-73549035/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)