{"$schema":"https://schemas.agentskills.io/discovery/0.2.0/schema.json","skills":[{"name":"x402-preflight","type":"skill-md","description":"Preflight before paying any x402 tool. Call x402check for ok|caution|avoid + history before PAYMENT-SIGNATURE. $0.01/URL after 1 free check/wallet.","url":"https://x402check.dev/.well-known/agent-skills/x402-preflight/SKILL.md"}]}