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Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications.

13 mentions on Hacker News by 12 people: 4 stories, 9 comments · first 2025-04-09 · latest 2026-06-18

Mentions per year 13 mentions · busiest year 2025 (10)
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  1. ▲ 96
    Ask HN: Is anyone using the A2A protocol?
    story by asim · 2026-06-18 · 45 comments
  2. ▲ 2
    Show HN: A2A Utils – a comprehensive set of utility functions for A2A servers
    story by benclarkeio · 2026-04-10 · 0 comments
  3. Have you looked at the Linux Foundations (Formerly Google Project) under the nearly identical name ? https://github.com/a2aproject/A2A There are many sub projects for the various languages like Go, Python, etc Edit: to be clear, A2A does…
    comment by joshuafuller · 2026-02-09 · in Show HN: A2A Protocol – Infrastructure for an Agent-to-Agent Economy
  4. …between agents, humans, and applications". https://github.com/i-am-bee/ACP Which is now part of A2A https://github.com/a2aproject/A2A I'm curious if there was an attempt to extend this to add first class support for interaction with IDEs…
    comment by jasonjmcghee · 2025-08-27 · in Bring Your Own Agent to Zed – Featuring Gemini CLI
  5. ▲ 2
    Google A2A: API Framework for AI Assistants
    story by manupati · 2025-04-15 · 0 comments
  6. ▲ 5
    Google launches (horribly named) A2A for AI to AI integration
    story by anymouse123456 · 2025-04-14 · 0 comments
  7. …for the feedback? Would you consider writing up an issue on our github with some more specifics? https://github.com/google/a2a A2A is being developed in the open with the community. You are finding some early details that we are looking…
    comment by TS_Posts · 2025-04-12 · in The Agent2Agent Protocol (A2A)
  8. Hi there! If you load the CLI demo in the github repo ( https://github.com/google/A2A/tree/main/samples/python/hosts... ) you can see what the A2A servers are returning. Take a look!
    comment by TS_Posts · 2025-04-12 · in The Agent2Agent Protocol (A2A)
  9. …tool in MCP? Since the agents I got from the 'A2A' protocol is passed as tools to another Agent... https://github.com/google/A2A/blob/72a70c2f98ffdb9bd543a57c8...
    comment by fengkx · 2025-04-10 · in The Agent2Agent Protocol (A2A)
  10. …standard that is Apache licensed[1]. That's no moat for Google. At best it's a drainage ditch. [1]: https://github.com/google/A2A
    comment by mindcrime · 2025-04-09 · in The Agent2Agent Protocol (A2A)
  11. …calling an LLM (ie messages, artifacts, etc.). The JS server example that they give is interesting https://github.com/google/A2A/tree/main/samples/js/src/serve... - they're using a generator to send sse events back to the caller - a little…
    comment by Flux159 · 2025-04-09 · in The Agent2Agent Protocol (A2A)
  12. …Context Protocol (MCP), which provides helpful tools and context to agents. A "server" sample: https://github.com/google/A2A/tree/main/samples/js/src/serve... So it looks like the point is that it keeps the connection/context open for…
    comment by flakiness · 2025-04-09 · in The Agent2Agent Protocol (A2A)
  13. Link to repo: https://github.com/google/A2A Docs: https://google.github.io/A2A/#/documentation I think they are trying to ride the MCP hype as well with their own implementation that is also meh. MCP itself is also an over-engineered…
    comment by _pdp_ · 2025-04-09 · in The Agent2Agent Protocol (A2A)