# Sigil

> A trust layer for AI agent skills: stake USDC on what a skill does, lose it when the evidence goes against you.

- [What is Sigil?](https://sigil-docs-568611a1.mintlify.app/docs/introduction.md): Stake real money on what an AI skill does. Break the claim with proof, take the money.
- [How it works](https://sigil-docs-568611a1.mintlify.app/docs/how-it-works.md): One claim, from the money going in to the money moving out, in five steps.
- [Architecture](https://sigil-docs-568611a1.mintlify.app/docs/architecture.md): Five parts, three chains, and why each chain earns its place.
- [Paid access over x402](https://sigil-docs-568611a1.mintlify.app/docs/x402-payments.md): How an agent pays to use a skill, settled on Hedera by Blocky402 — with real transactions you can open.
- [What is real vs stubbed](https://sigil-docs-568611a1.mintlify.app/docs/whats-real.md): An honest map of what runs live on testnet today and the one thing that is still a labelled mock.
- [Run it yourself](https://sigil-docs-568611a1.mintlify.app/docs/run-it.md): Open the hosted app, buy a skill, or run the whole thing locally.