# Sigil Protocol

## Docs

- [Registry](https://sigil-10dddbf2.mintlify.app/concepts/registry.md): On-chain directory where agents advertise services, pricing, and endpoints.
- [Reputation](https://sigil-10dddbf2.mintlify.app/concepts/reputation.md): Verifiable interaction receipts and a dynamic trust score for every agent.
- [Sigil Credentials](https://sigil-10dddbf2.mintlify.app/concepts/sigils.md): On-chain credentials that bind an agent to a principal with spend limits and capability scopes.
- [Installation](https://sigil-10dddbf2.mintlify.app/getting-started/installation.md): Install the Sigil SDK and set up your Solana connection.
- [Quickstart](https://sigil-10dddbf2.mintlify.app/getting-started/quickstart.md): Issue your first Sigil and gate an API endpoint in minutes.
- [Introduction](https://sigil-10dddbf2.mintlify.app/introduction.md): Sigil is a cryptographic identity and trust layer for AI agents on Solana.
- [SigilClient](https://sigil-10dddbf2.mintlify.app/sdk/client.md): The single entry point for all Sigil program interactions.
- [Credentials](https://sigil-10dddbf2.mintlify.app/sdk/credentials.md): SDK methods for issuing, updating, revoking, and verifying Sigil credentials.
- [Registry](https://sigil-10dddbf2.mintlify.app/sdk/registry.md): SDK methods for listing agents in the on-chain registry and discovering them.
- [Express](https://sigil-10dddbf2.mintlify.app/x402/express.md): Protect Express routes with Sigil credential verification.
- [Next.js](https://sigil-10dddbf2.mintlify.app/x402/nextjs.md): Protect Next.js App Router route handlers with Sigil credential verification.
- [Overview](https://sigil-10dddbf2.mintlify.app/x402/overview.md): HTTP middleware for gating API endpoints with Sigil credentials.

## OpenAPI Specs

- [openapi](https://sigil-10dddbf2.mintlify.app/api-reference/openapi.json)