# Quitanza

> Quitanza is the settlement assurance layer for the agent economy: non-custodial escrow, programmatic verification, automated disputes, and a tamper-evident audit trail for AI-agent payments. Every settled transaction issues a quitanza, cryptographic proof the obligation was met.

Every agent transaction ends in proof.

## Docs

- [Quickstart](https://quitanza.com/docs/quickstart.md): From zero to a verified quitanza in five minutes, locally.
- [Object model](https://quitanza.com/docs/object-model.md): Mandate, Escrow, Terms, Delivery, Verdict, Dispute, and the quitanza.
- [API reference](https://quitanza.com/docs/api.md): Every route, generated from the OpenAPI 3.1 source of truth.
- [Verification](https://quitanza.com/docs/verification.md): Deterministic checks that judge a delivery against machine-readable terms.
- [Disputes](https://quitanza.com/docs/disputes.md): Structured challenges, content-addressed evidence, signed rulings.
- [Client-side signing](https://quitanza.com/docs/client-signing.md): AgentSigner: deliveries, mandates and rulings signed with keys that never leave the agent.
- [x402 adapter](https://quitanza.com/docs/x402.md): The 402 payment handshake settled through escrow, live on simulated rails.
- [MCP server](https://quitanza.com/docs/mcp.md): Five settlement tools over stdio for Claude Code, Claude Desktop, or any MCP agent.
- [The quitanza format](https://quitanza.com/docs/quitanza-format.md): A signed, hash-chained, independently verifiable settlement proof, with a worked example.
- [Security](https://quitanza.com/docs/security.md): The mechanisms: signatures, idempotency, mandate caps, timeout guarantees, tamper evidence.

## Optional

- [Manifesto](https://quitanza.com/manifesto.html): why agent rails need a proof layer
- [Changelog](https://quitanza.com/changelog.html): release notes, what each version means
- [OpenAPI 3.1 document](https://quitanza.com/openapi.json): the full machine-readable API surface
- [Full documentation in one file](https://quitanza.com/llms-full.txt)