Check an x402 seller before you pay: wallet, domain, sanctions

Preflight before an agent pays an x402 seller: screens the payTo wallet against the OFAC SDN address list, reads who registered the resource domain and when (RDAP), and screens that company against the OFAC, EU and UN lists. Compares the payTo with the wallet the seller publishes in its 402 and /.well-known/x402, and blocks a lookalike (address poisoning). Returns ok, caution or block with one reason per finding.

post/v1/seller/preflight

Request

  • Base URL: https://api.limitguard.ai
  • URL: https://api.limitguard.ai/v1/seller/preflight
  • Auth: one of:
    • API key in header X-API-Key
    • none

Request body

pay_tostring required

The payTo wallet of the x402 quote you are about to pay

networkstring

CAIP-2 network of the quote (default eip155:8453); eip155:* or solana:*

resource_urlstring required

The https URL of the paid resource, on a public DNS name

payerstring

Optional: your own paying wallet (EVM). Its previous USDC payees on Base are compared with pay_to

Response

Success

Changes

No recorded changes to this operation across all 1 revision of this API.