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a2aproject/A2A

⭐ 25757 TypeScript added to this list on 2025-07-05 repository created 2025-03-25

The Agent2Agent (A2A) Protocol is an open protocol designed to enable communication and interoperability between opaque agentic applications, particularly in the context of generative AI agents developed on diverse frameworks and hosted on separate servers. The protocol addresses the challenge of allowing these AI agents to communicate and collaborate effectively as autonomous agents rather than mere tools. A2A provides a standardized language and framework that facilitates agent discovery, negotiation of interaction modalities (such as text, forms, and media), and secure collaboration on long-running tasks without exposing the internal state, memory, or proprietary tools of the agents involved. Key features of the A2A protocol include standardized communication using JSON-RPC 2.0 over HTTP(S), agent discovery through "Agent Cards" that detail capabilities and connection information, and flexible interaction modes supporting synchronous request/response, streaming via Server-Sent Events (SSE), and asynchronous push notifications. The protocol supports rich data exchange formats including text, files, and structured JSON data, and is designed with enterprise requirements in mind, incorporating security, authentication, and observability. The project provides SDKs in multiple programming languages such as Python, JavaScript, and Java, along with sample implementations to demonstrate the protocol in action. The A2A protocol aims to break down silos between different AI ecosystems, enable complex multi-agent collaboration, promote open standards for agent communication, and preserve the opacity of agents to protect intellectual property and enhance security. The project is open-source, maintained by Google LLC under the Apache License 2.0, and encourages community contributions to evolve the protocol. Future enhancements planned include formalizing authorization schemes within agent discovery, dynamic skill querying, improved task lifecycle and user experience features, and enhancements to client methods and transport mechanisms. Overall, the A2A protocol is a foundational technology for building interconnected, collaborative AI agent ecosystems that can operate securely and efficiently across diverse platforms and organizations.

https://github.com/a2aproject/A2A

a2aa2a-mcpa2a-protocola2a-serveragent-cardsagent-collaborationagent-discoveryagent2agentagentsai-agentsai-ecosystemai-interoperabilityapache-licenseauthenticationcommunicationgenerative-aigooglehttpinteroperabilityjava-sdkjavascript-sdkjson-rpc-2.0multi-agent-systemsopen-protocolopen-sourceopen-standardspython-sdksdksecure-collaborationsecurity