Agent2Agent (A2A)

Agent2Agent (A2A): A protocol for agents to discover each other and exchange tasks, now at version 1.0.0. Example: A2A joined the Agentic AI Foundation on 27 Aug 2026. Next in the glossary is Agentic AI Foundation (AAIF): The Linux Foundation-directed foundation that hosts MCP, A2A, goose and AGENTS.md.

Definition

A protocol for agents to discover each other and exchange tasks, now at version 1.0.0.

Example, with source

A2A joined the Agentic AI Foundation on 27 Aug 2026. (a2a-protocol.org, read 4 November 2026)

Where it appears on this site

• A2A

Neighbouring terms

• Agent Skills: A folder with a SKILL.md file of instructions and optional scripts that agents load on demand.
• Agentic AI Foundation (AAIF): The Linux Foundation-directed foundation that hosts MCP, A2A, goose and AGENTS.md.
• agents.json: An OpenAPI-based file at /.well-known/agents.json describing flows of API calls for agents.