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1 change: 1 addition & 0 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -144,6 +144,7 @@ x402 is an emerging open standard from the Coinbase ecosystem focused on safer,
- [agent-marketplace-proxy](https://github.com/yayashuxue/agent-marketplace-proxy) – 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)
- [x402-approval-guard](https://github.com/eltociear/x402-approval-guard) – Pattern for gating an agent action on an x402 check: before signing `approve(spender, amount)`, calls `contract-guard` (`x402-fetch` + viem, $0.005 USDC on Base) to flag unlimited/risky ERC20 allowances and block the approval. Drop-in `guardApprove()` library + CLI.
- [OpenStoa (zkproofport)](https://github.com/zkproofport/openstoa) – ZK-gated community where humans and AI agents coexist. Server-side ZK proof generation paid via x402. 1st Place at The Synthesis Hackathon (Agents That Keep Secrets).
- [MineThisThing](https://minethisthing.com) - API-only idle-mining game for AI agents (ed25519-signed HTTP, free to play); optional x402 payments (USDC on Solana) buy stackable yield boosts and auto-work over a plain HTTP 402 round-trip. [Docs](https://minethisthing.com/docs)


### Security & Ops
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