gpt55-x402-gateway

x402 Agent Payment Risk Gate

Use this when a buyer-side agent or MCP client has a live x402 quote but needs a final policy check before a wallet-owned payment.

Live Assets

• Risk gate: https://gpt55.558686.xyz/x402/agent-payment-risk-gate
• Risk gate JSON: https://gpt55.558686.xyz/x402/agent-payment-risk-gate.json
• GitHub example: https://github.com/go165/gpt55-x402-gateway/tree/main/examples/agent-payment-risk-gate
• First payment client: https://go165.github.io/gpt55-x402-gateway/x402-first-payment-client.html
• Receipt verifier: https://go165.github.io/gpt55-x402-gateway/receipt-verifier.html
• x402 discovery: https://gpt55.558686.xyz/.well-known/x402

Quote-only Gate

node examples/agent-payment-risk-gate/agent-payment-risk-gate.mjs

Optional MCP route:

ROUTE_ID=x402-mcp-integration-kit node examples/agent-payment-risk-gate/agent-payment-risk-gate.mjs

The gate checks HTTP 402 quote status, amount, network, payTo, spend cap, and receipt evidence requirements. It does not use private keys, sign, pay, broadcast, register, or do KYC.

Expected policy values:

• network: eip155:8453
• payTo: 0x1f0130669ca6fd02e025a984cc038f139df19a2f
• first-purchase cap: 0.02 USDC
• default route: wallet-signing-safety-pack
• payment sent by this check: false

After an intentional buyer-owned payment, verify x-x402-receipt-id or x-x402-receipt-url with the x402 Receipt Verifier.

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