A2A Trust Audit
Paste an A2A AgentCard URL. Get an L1–L4 audit with grade, score, and badge embed code. 0.001 USDC per run via x402. The agentlair.dev self-card is a free demo.
Result
Embed your badge
Raw audit JSON
About x402 payments
x402 is the HTTP 402 Payment Required protocol — agents pay USDC on Base in response to a 402 challenge. Browsers can't pay x402 today; this form is for agents and CLI clients with a wallet. Learn more