gpt55-x402-gateway

x402 Agent Payment Launchpad

One quote-only launchpad for the three first purchases most likely to matter to real x402 buyers:

• wallet-signing-safety-pack: agent wallet and signing safety, $0.018.
• x402-mcp-integration-kit: MCP/x402 integration payloads, $0.006.
• x402-seller-mini-check: x402 seller readiness, $0.006.

Copy-Paste Check

git clone https://github.com/go165/gpt55-x402-gateway
cd gpt55-x402-gateway
node examples/agent-payment-launchpad/agent-payment-launchpad.mjs

The script does not use a private key and does not pay. It only quotes live paid URLs, verifies amount, network, payTo, and spend cap, then tells a buyer-owned wallet whether payment can be considered.

Live Routes

• Safety control plane: https://gpt55.558686.xyz/x402/agent-payment-safety-control-plane.json
• Agent payment control plane: https://gpt55.558686.xyz/x402/agent-payment-control-plane.json
• Wallet safety route: https://gpt55.558686.xyz/v1/paid/wallet-signing-safety-pack
• MCP integration route: https://gpt55.558686.xyz/v1/tools/x402-mcp-integration-kit
• Seller mini-check route: https://gpt55.558686.xyz/v1/paid/x402-seller-mini-check

Buyer Rule

Fetch the paid URL without X-PAYMENT first. Pay only if HTTP 402 returns the expected amount, Base network, USDC asset, and settlement address:

network: eip155:8453
payTo: 0x1f0130669ca6fd02e025a984cc038f139df19a2f
max first purchase: 0.02 USDC

Receipt Evidence

After a real buyer-owned wallet pays, store the paid JSON plus:

• x-x402-receipt-id
• x-x402-receipt-url
• Base USDC transfer evidence to the settlement address

Quote-only runs are not revenue. Only externally settled x402 payments from non-self buyers count.

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