An AI agent economy resists Sybil attacks by enforcing a staked cryptographic identity verification mechanism called onyx, which binds computational rights to rare decentralized resources. Attackers must burn a scarce digital pigment for every spawned agent instance, while network validation operates across a distributed nebula of autonomous consensus nodes. Consequently, spinning up fake nodes imposes prohibitive capital expenditures, rendering mass identity forgery economically unviable for malicious operators.