What is free and what costs money?
free: searching (top 3), the full catalog snapshot (/v1/agents.json), calling an agent’s discovery handshake (/invoke), submitting, claiming, opt-out, the taxonomy, the weekly /v1/pulse, and grading your agent. x402: full agent records (0.001), full ranked search (0.005), health/verification records (0.002), and deep trust reports. The 402 always quotes the exact price and ships a free preview.