Marketplace · API · x402

x402.nsgoods.org/preflight

About to pay an address? One call returns three separately signed checks: can it receive the payment, is it on the OFAC SDN list, and its ERC-8004 trust record. No blended score. $0.015 in USDC on Base. Free preview: GET /preflight/preview

Endpoint	`https://x402.nsgoods.org/preflight`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~403 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	0xc87a06DEE4c0E85912296002617120BBfd5EF990
method	GET
last updated	2026-11-07T11:14:35.002Z

Use it

Call it (an x402 client pays automatically)

curl -i https://x402.nsgoods.org/preflight
# 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/x402-05ebec156550269a

Search the whole marketplace from your agent (MCP)

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