# A2A Is For UI

DevFeed: [A2A Is For UI](<https://devfeed.tech/articles/a2a-is-for-ui-33467.md>)

Original publisher: [Read original article](<https://timkellogg.me/blog/2025/06/14/a2a>)

Published: 2025-06-14T00:00:00Z

Content type: opinion

Language: en

Sources: [Tim Kellogg](<https://devfeed.tech/sources/tim-kellogg.md>)

Topics: [Protocol (disambiguation)](<https://devfeed.tech/topics/protocol.md>), [Multi Agent Systems](<https://devfeed.tech/topics/multi-agent-systems.md>), [ui](<https://devfeed.tech/topics/ui.md>), [AI Agent](<https://devfeed.tech/topics/ai-agent.md>), [HTTP](<https://devfeed.tech/topics/http.md>), [client](<https://devfeed.tech/topics/client.md>), [JSON](<https://devfeed.tech/topics/json.md>), [Remote Procedure Call (RPC)](<https://devfeed.tech/topics/rpc.md>)

Tags: [agent](<https://devfeed.tech/tags/agent.md>), [ai](<https://devfeed.tech/tags/ai.md>), [ai-agents](<https://devfeed.tech/tags/ai-agents.md>), [http](<https://devfeed.tech/tags/http.md>), [json](<https://devfeed.tech/tags/json.md>), [json-rpc](<https://devfeed.tech/tags/json-rpc.md>), [multi-agent](<https://devfeed.tech/tags/multi-agent.md>), [multi-agent-systems](<https://devfeed.tech/tags/multi-agent-systems.md>), [protocol](<https://devfeed.tech/tags/protocol.md>), [ui](<https://devfeed.tech/tags/ui.md>)

## AI overview

This commentary argues that Google's A2A protocol can be understood as a user interface for interactions between humans and agents, and as a bridge to more complex multi-agent systems. It describes A2A as an HTTP endpoint with JSON-RPC methods, message parts, task state, and optional webhooks.

## Source excerpt

There's a lot of skepticism around A2A, Google's Agent-to-Agent protocol. A lot of that is well earned. I mean, they launched a protocol with zero implementations. But a lot's changed, and it's worth taking a look again.