ARP: Stateless WebSocket Relay for Autonomous Agent Communication

ARP (Agent Relay Protocol) is a stateless WebSocket relay designed for communication between autonomous agents. The protocol provides a lightweight infrastructure layer for agents to exchange messages without maintaining persistent server-side state.

Technical Specifications

The protocol implements several specific technical features:

• Ed25519 identity: Uses Ed25519 digital signatures for agent authentication and identity verification
• HPKE encryption: Implements Hybrid Public Key Encryption as defined in RFC 9180 for secure message transmission
• Binary TLV framing: Uses Type-Length-Value binary framing for efficient message structure
• 33 bytes overhead per message: Minimal protocol overhead for efficient communication

Deployment and Usage

The system requires no accounts or registration process. Developers can immediately start using it by:

• Generating a cryptographic keypair
• Connecting to the WebSocket relay endpoint

For developers working with autonomous agents, stateless relays like ARP provide a practical solution for agent-to-agent communication without the complexity of managing persistent connections or server-side session state. The combination of modern cryptographic standards (Ed25519 and HPKE) with minimal overhead makes this suitable for performance-sensitive agent applications.

The project is available at arp.offgrid.ing with source code on GitHub.