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1 change: 1 addition & 0 deletions Projects.md
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Expand Up @@ -67,6 +67,7 @@ Libraries, SDKs, and dev tools for building with x402.
- [cipher-x402-client](https://github.com/cryptomotifs/cipher-x402-client) - Tiny TypeScript client for x402 v2. Zero-config USDC-on-Base, auto-retry on 402 Payment Required.
- [cipher-x402-mcp](https://github.com/cryptomotifs/cipher-x402-mcp) - MCP server exposing 8 CIPHER x402-gated tools to Claude/Cursor/VS Code. Agents auto-pay USDC per tool call.
- [agenticpay](https://github.com/krystiangw/agenticpay) - Open-source TypeScript x402 stack for MCP on Solana: SDK, CLI, paywall middleware, **first OSS self-hostable facilitator**, Eliza plugin. Hosted devnet endpoint, live Claude Opus demo paying autonomously. MIT. npm: `@agenticpay/{sdk,cli,mcp-server,facilitator,eliza-plugin}`.
- [Hilt Pay](https://www.hilt.so/x402) - Payment-to-access infrastructure for x402 V2 challenge and retry flows on Solana USDC, with settlement verification, receipts, entitlements, atomic usage consumption, webhooks, SDKs, MCP, and A2A discovery.

## x402 Developer Sandboxes & Testing
Tools and playgrounds to experiment and prototype with x402.
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