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Reference implementation of the commodity-API-resale pattern: ~80 lines of Express that wrap any upstream REST API with `x402-express` middleware. Demoed with DataForSEO Google SERP at $0.001 USDC/call on Base. [Live](https://agent-marketplace-proxy.vercel.app)

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How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -X POST https://github.com/yayashuxue/agent-marketplace-proxy