Google A2A开放的安全代理间通信协议

4.7 (6)

审阅者 Daniel Nikulshyn·更新 2026年5月

Open Source Protocol Multi-Agent Interoperability Enterprise Developer Tools Security

概览

Google A2A（Agent2Agent）是一种开放协议，旨在让 AI 代理在不同平台、供应商和框架之间发现、通信和协作。它建立了通用语言，使基于不同技术栈构建的代理能够交换任务、共享上下文，并在多步骤工作流程中协调合作。该协议侧重于互操作性和安全性，定义了代理发现、能力协商、消息交换和任务委派的标准方法。它支持短期请求和长期协同会话，并内置了身份验证、身份和数据处理的考量。 A2A 面向那些希望避免被单一供应商或框架锁定的多代理系统开发者和企业。它将代理视为一等网络公民，从而支持生态系统中将专业化代理组合成更大规模的解决方案。

主要功能

标准化的代理发现和能力卡
安全的代理间信息交换
-task 代表和状态跟踪
框架中立的规格
支持流式和异步相互作用
认证和身份基本

价格

模型: Free
分类: AI Agent Development Frameworks
评分: 4.7 / 5 (6)

使用场景

跨供应商代理序列化

利用共享通信标准，协调不同框架和供应商上建构的AI代理，以共同处理多步工作流。

安全企业代理网络

使用身份、身份基本和标准化信息交换，确保企业级代理之间的信息安全

代理发现和代表

为代理提供发布能力卡、发现同僚、动态代表任务与状态追踪的功能

长时间的协同会话

对代理在长期的会话（如数据处理、多阶段任务、研究等）进行支持

优点 & 缺点

优点

开放标准减少了供应商的锁定
启用了不同框架上的代理协作
背后支撑着Google和行业伙伴
集成的安全性和认证模式
支持简单及长时间任务

缺点

仍在演进状态，工具仍有不足
需要努力适应
兼容代理的生态仍在早期
增加了复杂性

评测

4.7

6 个评分的平均值。

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Daniel Schmidt

Apr 28, 2026

Skeptical, then convinced

I went in skeptical — most tools in this space overpromise. It actually delivers on framework-agnostic specification, and open standard reduces vendor lock-in caught me off guard. Ecosystem of compatible agents is early-stage is why this isn't a perfect score, still, I'd recommend giving it a real trial.

Nadia Petrova

Dec 12, 2025

Does the job

Pretty happy overall. Authentication and identity primitives just works and enables cross-framework agent collaboration. but no dealbreakers — I'd recommend it to a friend without hesitating.

Marcus Bell

Dec 4, 2025

Use it every day

Honestly didn't expect to like it this much. Authentication and identity primitives is exactly what I needed, and backed by Google and industry partners. I do wish requires implementation effort to adopt, but I reach for it almost every day now and it just clicks.

Frank Müller

Oct 12, 2025

Does the job

Pretty happy overall. Secure message exchange between agents just works and supports both simple and long-running tasks. Ecosystem of compatible agents is early-stage can be annoying, but no dealbreakers — I'd recommend it to a friend without hesitating.

George Papadakis

Aug 26, 2025

Years in this space

I've evaluated a lot of these over the years. What stands out here is framework-agnostic specification — handled better than most — and built-in security and authentication patterns. Worth the time if this is your use case.

Olga Ivanova

Aug 3, 2025

Years in this space

问答

What does Google A2A actually do and who is it for?

A2A is an open protocol that lets AI agents from different platforms, vendors, and frameworks discover each other, exchange messages, and delegate tasks. It's aimed at developers and enterprises building multi-agent systems who want interoperability without locking into a single vendor or framework.

What are the main limitations of adopting A2A today?

A2A is still evolving, with limited mature tooling and an early-stage ecosystem of compatible agents. Adopting it requires implementation effort and adds complexity compared to staying within a single-vendor stack, so early adopters should expect to build against a moving specification.

How does A2A handle security and authentication between agents?

A2A includes built-in primitives for authentication and identity, defining standard patterns for secure message exchange between agents. It also addresses data handling considerations, so agents across vendors can verify each other and communicate safely during both short requests and long-running sessions.