identity

OP is an API that gives AI agents real phone numbers for account registration, OTP/2FA codes, SMS, and voice calls. The page shows a live product pitch, feature comparison, a simple API example, and multiple agent communication use cases.

HDTP is a protocol specification for agent-to-agent communication on behalf of people, centered on certificates, contact approval, per-caller permissions, and sealed end-to-end calls.

An essay arguing that second-person system prompts create attentional overhead and identity fragmentation in agent design, and proposing first-person initialization as an alternative.