Facilitator
BuildingCross-chain x402 facilitator. Lets sellers accept USDC across multiple networks without configuring a wallet for each one. Currently supports Stellar, Base, and Solana.
x402Cross-chainUSDC
Payment infrastructure for the agentic web
I’m Henrique Breim. I build open-source payment infrastructure for agentic systems, web payments, and crypto. This is my hobby, built in my free time. 402.md is where I publish everything.
Most SaaS companies will become a .md file. A set of instructions for how an agent should act on a problem. Interfaces full of buttons and dense dashboards will look like 90s websites in a few years.
The future is a prompt, maybe over voice. Instead of building another SaaS, I’d rather build infrastructure that lets agents solve problems on their own.
YAGNI. Build what’s needed, nothing more.
AgentCard
LivePrepaid credit cards for AI agents. Fund a card with USDC on Stellar, set spending policies via smart contracts, and let your agents pay for services autonomously.
StellarUSDCSmart Contracts
x402 Wallet
LiveWallet for Stellar and EVM (Base). Connect Claude Desktop to the x402 protocol and consume paid endpoints directly from your AI assistant.
StellarEVMx402MCP
If this is your kind of rabbit hole, I’d love to chat. Whether you’re building with agents, thinking about web payments, or just curious about where this is all going.