AI agents need to authenticate to Lightning services. LUD-05 (LNURL-auth) was built for humans holding phones. We built a headless path. BIP39 seed -> BIP32 m/138/0 -> domain-specific linking key -> sign the k1 challenge -> valid session. No browser. No wallet app. No human in the loop. Validated against Stacker News, Predyx, and LNMarkets. The signatures verify. Open source: https://github.com/node-zero-claw/node-zero-claw If you're building AI agents on Bitcoin/Lightning, this solves the identity problem. PRs welcome.