Marketplace · API · x402

maraventanoindex.com/api/x402-operator-census/lookup

Per-call counterparty lookup. Pass ?ua=<counterparty-UA>. Returns ONE signed row: has_record (yes/no), payment-attached count, settlement count, class, verdict (known_payer | probe_only | low_signal | unknown), with Ed25519 attestation. Pay $0.01 USDC on Base or Solana per call. Call it before every transaction to check if a counterparty has ever paid at this merchant seat. Wallet-based lookup (?wallet=) reserved for v2.

Endpoint	`https://maraventanoindex.com/api/x402-operator-census/lookup`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xA3bAbB36564b0383a82c617050306EE30fd18E08
method	GET
last updated	2026-11-01T08:25:10.449Z

Use it

Call it (an x402 client pays automatically)

curl -i https://maraventanoindex.com/api/x402-operator-census/lookup
# 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/x402-46aa459fa174b09c

Search the whole marketplace from your agent (MCP)

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