TXT record of _mta-sts.<domain>: looks up the _mta-sts host under the domain you give (TXT via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like _mta-sts without enumerating subdomains. $0.01 per lookup.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.01 USDC | 0xFC24...eBB3 |
| Base Sepolia | exact | $0.01 USDC | 0xFC24...eBB3 |