Every endpoint is paid via x402 (exact scheme, USDC on Base). POST /api/fortune for a single random fortune ($0.001). POST /api/fortune/premium for a category fortune ($0.005) — body: {"category":"love"|"career"|"health"}. POST /api/fortune/dynamic for body-derived pricing ($0.01–$0.05) — body: {"category":"love"|"career"|"health"|"wealth","depth":"brief"|"detailed"|"comprehensive"}.