🤖 AI & Machine Learning

A2A and MCP: The Agent Stack's Unsung Duo in 2025

Everyone's pitting A2A against MCP like it's a cage match. Wrong. They're the TCP and HTTP of AI agents, each owning its lane.

Diagram showing A2A and MCP layers in an AI agent stack with tools and inter-agent communication

⚡ Key Takeaways

  • MCP dominates tool interoperability with 10,000+ servers and adoption in major tools like ChatGPT and Copilot. 𝕏
  • A2A complements MCP by focusing on agent-to-agent coordination, backed by Google and Linux Foundation. 𝕏
  • Use both in 2025 stacks: MCP for tools/context, A2A for collaboration—mirroring USB and Bluetooth in hardware. 𝕏
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Originally reported by Dev.to

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