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1 change: 1 addition & 0 deletions README.md
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Expand Up @@ -39,6 +39,7 @@ x402 is an emerging open standard from the Coinbase ecosystem focused on safer,
- [Strale](https://strale.dev) - Business data & compliance APIs for AI agents. 250+ quality-scored capabilities (company data, VAT validation, sanctions screening, KYB) across 27 countries with x402 payment support. [MCP server](https://www.npmjs.com/package/strale-mcp) available.
- [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.
- [systemprompt.io reports](https://systemprompt.io/api/v1/mcp/systemprompt-reports/mcp) - Paid MCP server selling per-call EU AI Act compliance reports to agents ($1.50, USDC on Base or Stripe checkout, no account). Discovery and usage guide free; inputs validated before payment; more report tools launching in tools/list.

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