Google open-sources A2A, which is used for agent interaction protocol. Anthropic's MCP is a model content interaction protocol. The value of A2A is greater than that of MCP.

Written by
Silas Grey
Updated on:July-03rd-2025
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**Google open-sources the A2A protocol, bringing a revolutionary breakthrough to agent interaction. **

Core content:
1. A2A protocol definition and its significance to agent interaction
2. A2A comparison with MCP and its value beyond MCP
3. How A2A promotes agent integration, application integration and standardization development

Yang Fangxian
Founder of 53AI/Most Valuable Expert of Tencent Cloud (TVP)

My point of view:

1. A2A value exceeds MCP

2. With A2A, MCP is not required in theory

3. A2A solves agent integration and realizes application integration, and application companies have integration standards

4. Agent tools will also be more standardized

5. Promote the development and popularization of Agent.



1. What is A2A

A2A is an open protocol that provides a standard way for agents to interact, enabling them to collaborate with each other, regardless of the underlying framework or vendor.

Previously, agents on these platforms could not communicate freely. Now, through the A2A protocol, these enterprise platforms can safely and freely automate the interaction of data.


2. What are the values ​​of A2A?

1. The server agent can publish service cards for clients to discover.

2. The client agent can send tasks to the server agent.

3. The client agent and the server agent have established a collaborative negotiation mechanism, which can submit artifacts to the client agent after completing the task.
4. The problem of communication protocol standardization between agents has been solved.

5. Unify the chaotic Agent structure and create new execution and interaction standards. This is much more powerful than the MCP some time ago.