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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)
20082026
  1. 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…
  2. …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…
  3. …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)
  4. 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)
  5. …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)
  6. …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)
  7. …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)
  8. …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)
  9. 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)