Fidacy: The firewall for AI agents that move money

Hey Product Hunt 👋 I'm Lucas, founder of Fidacy. AI agents are starting to move real money — and they can be prompt-injected into paying a scammer, paying the same invoice twice, or paying over your limit. Zscaler tested 26 models and 4 paid the scammer. One agent sent $442K to a hijacked address in a single transfer. And "the AI did it on its own" isn't a legal defense. Fidacy is a payment firewall for AI agents. It's a drop-in MCP server (npx -y @fidacy/mcp) that checks every agent payment against a signed mandate BEFORE the money moves — deny-by-default — and hands back an EdDSA-signed, Bitcoin-anchored verdict that anyone can verify against public keys. You don't trust us. You check the signature. Free, local-first, non-custodial. Works in Claude Code, Claude Desktop, Hermes, OpenClaw — any MCP host. Would love your feedback, especially from anyone building agents that touch money. What would you point Fidacy at first?