> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agntor.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Concepts

> Core ideas and terminology

# Concepts

## Audit Ticket

A signed JWT containing issuer, agent ID, expiry, and constraints.

## Constraints

Rules enforced on transactions, including `max_op_value`, `allowed_mcp_servers`, and `requires_x402_payment`.

## Agent Card

A public identity card used by other agents to verify certification.

## Registration

ERC‑8004 compatible registration data for agent discovery.