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Fidacy
The firewall for AI agents that move money
Your AI agent can be prompt-injected into paying a scammer, paying an invoice twice, or paying over your limit. Fidacy blocks it before the money moves, deny-by-default, and issues proof anchored to Bitcoin, third-party verifiable, of exactly what was authorized. No one has to trust us. Anyone can verify. Free, local-first, non-custodial.
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?
About Fidacy on Product Hunt
“The firewall for AI agents that move money”
Fidacy was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #68 on the daily leaderboard. Your AI agent can be prompt-injected into paying a scammer, paying an invoice twice, or paying over your limit. Fidacy blocks it before the money moves, deny-by-default, and issues proof anchored to Bitcoin, third-party verifiable, of exactly what was authorized. No one has to trust us. Anyone can verify. Free, local-first, non-custodial.
On the analytics side, Fidacy competes within Fintech, Artificial Intelligence and Security — topics that collectively have 526.1k followers on Product Hunt. The dashboard above tracks how Fidacy performed against the three products that launched closest to it on the same day.
Who hunted Fidacy?
Fidacy was hunted by Lucas CEO. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Fidacy including community comment highlights and product details, visit the product overview.
Lucas CEO