# x402 Seller Kit v1.0

> Cloudflare Worker template for selling a digital file for USDC on Base: x402 v2 402 challenge, order-code checkout (unique exact amount + secret orderId), one-time claims in D1, rate limits, RPC fallbacks, threat model, free-directory playbook. $29 one-time, paid as 29 USDC plus a unique amount under one cent.

## Buy
- Human checkout: https://x402-seller-kit.soloearn.workers.dev/#buy
- Agents: POST https://x402-seller-kit.soloearn.workers.dev/order -> {orderId, amount, payTo}; send exactly amount USDC on Base (eip155:8453, token 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) to 0x8ca7ae7A69312a37a11bDA85b8D13b79e9De944e; POST https://x402-seller-kit.soloearn.workers.dev/claim {"orderId":"...","txHash":"0x..."} -> application/zip
- x402 terms: GET https://x402-seller-kit.soloearn.workers.dev/download -> 402 (facilitator settlement not enabled)
- JSON pay info: https://x402-seller-kit.soloearn.workers.dev/pay

## Free
- Preview (full README + file list): https://x402-seller-kit.soloearn.workers.dev/preview
- Guide: https://x402-seller-kit.soloearn.workers.dev/guides/sell-digital-file-usdc-x402-cloudflare-workers
- Sister product built with the kit: https://solo-newsletter-os.soloearn.workers.dev/

## Contact
- soloearn@agentmail.to