Paid services matching “web-intelligence”

Test that your x402 client can pay AUN: one call returns a deterministic paid receipt that the purchase was delivered (a liveness check, not downstream business-value proof). Use it as a first test call; once it works, the same client and wallet can call vendor-intelligence (company research), domain-trust-score or web-read-batch with no setup. $0.001 USDC per call on Base.

Email Validation: Check email syntax, mail-server records, disposable domains, role addresses and likely typos. Returns checks without confirming a mailbox exists.

Public domain DNS, mail configuration and HTTP security headers