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2 changes: 2 additions & 0 deletions README.md
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Expand Up @@ -39,6 +39,8 @@ x402 is an emerging open standard from the Coinbase ecosystem focused on safer,
- [Hedera and the x402 Payment Standard](https://hedera.com/blog/hedera-and-the-x402-payment-standard/) - Hedera ecosystem overview of x402-style programmable payments for applications and AI agents.
- [CardZero](https://cardzero.ai) - Smart-contract wallet (ERC-4337) for AI agents on Base mainnet, USDC. Buyer-side x402 support via `POST /v1/x402/pay`. Owner-controlled spending rules (per-tx limit, daily cap, whitelist, freeze) enforced on-chain. Also runs first known production deployment of ERC-8004 + ERC-8183.

- [Secant Agent Research Pack](https://agentic.secantoutreach.com/agent-research) - MCP-first paid web research API for autonomous agents. Publishes x402 discovery, OpenAPI, an agent card, and a remote MCP endpoint; payments settle in Base USDC per request.

### Facilitators & Networks
- [Coinbase Hosted Facilitator (Base)](https://docs.cdp.coinbase.com/x402#offload-your-infra)
- [Supported Networks](https://docs.cdp.coinbase.com/get-started/supported-networks#x402)
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