Marketplace · API · x402

x402-seller.onrender.com/census/demographics

US Census Bureau American Community Survey (ACS) 5-Year estimates for a ZIP code: total population, median household income, median age, and total housing units. ZIP codes map to Census ZCTAs (Census-drawn approximations); some ZIPs (PO-box-only or very new) have no ZCTA match and return 404. Reflects a rolling 5-year survey window, not real-time.

Endpoint	`https://x402-seller.onrender.com/census/demographics`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~346 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xbd61dfb01f81c91f02b0ccd51b0220e0c8918639
method	GET
last updated	2026-11-12T04:51:21.133Z

Use it

Call it (an x402 client pays automatically)

curl -i https://x402-seller.onrender.com/census/demographics
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-4a23352d83e001ac

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}