Spend preflight for AI agents. Send the x402 PaymentRequired body (v1 or v2) you received, or a cart, plus optional rules (per-payment max, hold threshold, daily cap, allowlists, new-domain days). Returns allow|hold|block with reasons, the cheapest acceptable payment option, and a receipt id. Read-only: never signs, settles, or holds funds. Use before every payment.
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On-chain USDC settlements received on Base · 0xBf4164e07552e4c1b1B1597E72C7acAA3F0a1c58
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On-chain payment destinations for this service, with each wallet’s current USDC balance. Click an address to view it on the block explorer.