--- title: "Agent2Agent (A2A): definition and example | Agent MCP Directory" description: "Agent2Agent (A2A): A protocol for agents to discover each other and exchange tasks, now at version 1.0.0. Defined with a sourced example." canonical: https://agentmcpdirectory.com/glossary/agent2agent site: "Agent MCP Directory" last_updated: 2026-11-04 section: "Glossary" --- # Agent2Agent (A2A): definition and example | Agent MCP Directory > Agent2Agent (A2A): A protocol for agents to discover each other and exchange tasks, now at version 1.0.0. Defined with a sourced example. Source: https://agentmcpdirectory.com/glossary/agent2agent Site: Agent MCP Directory Last reviewed: 2026-11-04 # 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](https://a2a-protocol.org/latest/blog/2026/08/27/a-new-chapter-for-a2a-joining-the-agentic-ai-foundation/), read 4 November 2026) ## Where it appears on this site - [A2A](https://agentmcpdirectory.com/standards/a2a/) ## Neighbouring terms - [Agent Skills](https://agentmcpdirectory.com/glossary/agent-skills/): A folder with a SKILL.md file of instructions and optional scripts that agents load on demand. - [Agentic AI Foundation (AAIF)](https://agentmcpdirectory.com/glossary/agentic-ai-foundation/): The Linux Foundation-directed foundation that hosts MCP, A2A, goose and AGENTS.md. - [agents.json](https://agentmcpdirectory.com/glossary/agents-json/): An OpenAPI-based file at /.well-known/agents.json describing flows of API calls for agents. Edition 4 November 2026 Method [How rows are verified](https://agentmcpdirectory.com/method/) Data [CSV and JSON](https://agentmcpdirectory.com/data/) Markdown [This page as markdown](https://agentmcpdirectory.com/glossary/agent2agent/index.md) ## Sources - [Source for the Agent2Agent (A2A) example](https://a2a-protocol.org/latest/blog/2026/08/27/a-new-chapter-for-a2a-joining-the-agentic-ai-foundation/), read 4 November 2026 Last reviewed 4 November 2026