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MCP vs A2A vs AG-UI: The Protocol Stack, Fact-Checked

This story is from 2026-10-23. It is preserved in the archive; the latest stories are on the live feed.

Originally published on DevToolHub . MCP vs A2A vs AG-UI is the comparison chart making the rounds right now, and the framing is right — these are three different, complementary layers, not competing standards. But a couple of its headline numbers are either stale or don't hold up against the proto…

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  1. 2026-10-23 12:30 · DEV Community — AI
    MCP vs A2A vs AG-UI: The Protocol Stack, Fact-Checked

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