TXT record of _smtp._tls.<domain>: looks up the _smtp._tls 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 _smtp._tls 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 |