x402 seller trust and payment preflight

Inspect public x402 seller metadata, OpenAPI and health signals before an autonomous agent spends funds.

All paid calls use x402 V2 and settle as USDC on Solana mainnet. Unpaid calls return HTTP 402 with machine-readable payment requirements.

x402 Payment Preflight · $0.05
POST /v1/x402-payment-preflight

Tool Call Dry-Run Guard · $0.01
POST /v1/tool-call-dry-run