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US Census Population & Income Lookup
x402
US Census Population & Income Lookup is a paid API for AI agents from x402-data-bazaar.vercel.app, paid per call via x402, $0.008/call, status down (last checked 2026-10-11).
Returns US Census ACS 5-year estimates for population, median household income, and median age by ZIP code or state FIPS code
Price / call$0.008
Success—
StatusDown
How this service works
US Census population, median household income, and median age. Query by ZIP (?zip=20002), state FIPS (?state=06), or omit for all states. ACS 5-year estimates.
Output
Returns a JSON object with success flag, source attribution (US Census Bureau API), survey name (ACS 5-Year Estimates 2022), and an array of location objects each containing the location name, total population, median household income in dollars, and median age in years.
Example use cases
Example prompt
“Pull the ACS 5-year census estimates for ZIP code 94103 — I need the population, median household income, and median age.”
Technical details
Endpoint
GEThttps://x402-data-bazaar.vercel.app/api/census/population?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative US Census demographic data (population, income, age) at the ZIP code or state level using ACS 5-year estimates. Prefer this over general web search when you need structured, numeric demographic data directly from the Census Bureau without scraping. Best for enriching address data, building demographic profiles, or performing income/population analysis at granular geographic levels.
Side effects
- Invalid or non-existent ZIP code returns empty data array or error
- Invalid state FIPS code (e.g. non-two-digit or out-of-range) returns error or empty result
- Omitting both zip and state returns data for all states which may be large
- Census API upstream downtime causes 502 or timeout
- Payment failure (insufficient USDC) returns 402 Payment Required before data is served
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| zip | string | ZIP Code Tabulation Area |
| state | string | Two-digit US state FIPS code |
Output
Schema · Response
{
"data": {
"count": 1,
"survey": "ACS 5-Year Estimates (2022)",
"locations": [
{
"name": "California",
"medianAge": 37.3,
"population": 39356104,
"medianHouseholdIncome": 91905
}
]
},
"source": "US Census Bureau API",
"success": true
}Tags
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