diff --git a/README.md b/README.md
index 4c577eb..04d7461 100644
--- a/README.md
+++ b/README.md
@@ -223,6 +223,7 @@ _List inspired by the [awesome](https://github.com/sindresorhus/awesome) list th
 - [shadcn/ui](https://github.com/shadcn/ui) - Beautifully designed components that you can copy and paste into your apps.
 - [StorageBox](https://github.com/AlandSleman/StorageBox) - A Simple File Storage Service Built with Go and Next.js.
 - [Taskade](https://taskade.com/) - AI-powered workspace for teams with real-time collaboration, AI agents, project management, and workflow automation.
+- [CIPHER x402 Paywall](https://cipher-x402.vercel.app) - Live Next.js demo of the x402 HTTP 402 payment protocol: 4 chapters gated behind pay-per-request USDC micropayments, no accounts or API keys. Deployed on Vercel.
 
 ## Books