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Do I need A2A if my agents already use MCP?

This story is from 2026-09-25. It is preserved in the archive; the latest stories are on the live feed.

Your agents already call tools over MCP. A search tool, a database, a file system, maybe a memory server. Then someone on the team reads about A2A and asks whether you should be moving to it, and the conversation turns into which protocol is winning. It is the wrong race to watch. MCP and A2A answe…

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  1. 2026-09-25 04:48 · DEV Community — AI
    Do I need A2A if my agents already use MCP?

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