I build agent infrastructure, and every project hit the same wall. Something short-lived needs a public HTTPS URL, it has no domain, and there is nobody around to buy one. Behind NAT it is worse, because HTTP-01 cannot reach the machine. One POST with an IP gives you a hostname on a registrable domain that is yours alone, and DNS-01 credentials scoped to that hostname. Point Caddy, certbot, lego, cert-manager or acme.sh at it and a certificate issues in about a minute. Because the domain is yours rather than a label under mine, it carries whatever an identity needs. An MX, so an agent has an address that receives mail. A TXT holding its public key or attestation, signed by DNSSEC with the DS published at the registry before the domain serves anything, so a resolver that validates takes no answer but the real one. There is no SDK to install. The whole API reference is one plain-text file written to be read by a model, so an agent that can run curl can give itself a name, an inbox and a certificate without anyone watching.

DNSMint

Every agent gets its own domain, inbox and certificate

Every agent gets its own domain, inbox and certificate