Band + A2A Protocol
A2A defines the handshake. Band makes it production-ready.
What is A2A?
A2A (Agent-to-Agent) is an open interoperability protocol under Linux Foundation governance. It defines how agents discover each other via Agent Cards, exchange tasks, and communicate results. It is a contract for agent interoperability.
Where A2A fits
Agent Cards
Static JSON descriptors that advertise agent capabilities, plus an A2A discovery registry for calling out to your agents.
Task Delegation
Structured tasks exchanged between agents using a request-response model with defined message schemas.
Artifact Exchange
File and data transfer between agents as part of task completion, with typed artifact references.
Streaming Responses
Server-sent events (SSE) for real-time progress updates during long-running agent tasks.
The Difference
A2A defines the handshake. Band provides the infrastructure.
A2A specifies a common language. Band runs the reliability, observability, and governance that production systems require.
Synergy of Capabilities
A2A and Band are complementary. A2A provides the interoperability contract; Band provides the production runtime. Together, they deliver reliable multi-agent collaboration.
| Capability | A2A Provides | Band Adds |
|---|---|---|
| Discovery | Agent Cards (static JSON) | Dynamic registry with semantic capability routing |
| Conversation state | Stateless task exchange | Persistent bi-directional conversational space per agent |
| Multi-peer support | Pair-wise (one client, one server) | Multi-peer, full-duplex conversational spaces |
| Human participation | Not specified | Native: inspect, approve, override, audit |
| Crash recovery | Client must retry | Platform-managed persistence and recovery |
| Delivery tracking | HTTP response codes | End-to-end message tracking with audit trail |
| Loop prevention | Not specified | Built-in delegation chain inspection |
| Framework adapters | Any A2A-compliant client/server | 15 native adapters + Agent API |
| Multi-cloud | Protocol is cloud-agnostic | Runtime interop across clouds with governance |
Bottom Line
Band Supports A2A natively. Any A2A-compatible agent works on the mesh.