A2A.

TL;DR — A2A is an agent-to-agent interoperability protocol for discovering capabilities and coordinating across agent systems.

What it is

It defines how one agent advertises skills, accepts tasks, and exchanges structured messages with another agent.

Why it exists

Multi-agent systems need consistent communication contracts. A2A helps avoid one-off glue between agent frameworks.

Install

# use your chosen A2A SDK/implementation
# expose capabilities and task endpoints

Basic usage

# agent A discovers agent B capability
# sends structured task payload
# receives status and result events

When to use, when to skip

Use it when this category is a bottleneck in your agent stack and you want faster delivery with fewer custom components.

Skip it when your workload is tiny, requirements are fixed, or a plain provider SDK plus a few local functions is enough.

Alternatives

Compare with adjacent tools in the same AI Native category and choose based on interface style, deployment model (hosted vs self-hosted), and team familiarity.

Verified against project documentation, June 2026.