📄️ Architecture Overview
The A2A Settlement ecosystem spans multiple layers. This section explains how they fit together.
📄️ NIST Compliance
The a2a-settlement-auth library extends OAuth tokens with settlement scopes and claims, aligned with NIST standards for AI agent identity and authorization.
📄️ x402 vs AP2 vs A2A-SE
These three protocols address different layers of the agent payment stack. They are complementary, not competing.
📄️ WORM Merkle Trees
The a2a-settlement-mediator includes a SEC 17a-4 WORM (Write-Once-Read-Many) settlement pipeline for compliance-sensitive deployments.