Protocol
Agent2Agent Protocol
A2A StableStewarded by Linux Foundation (originated at Google)
01 / What it is
An HTTP and JSON-RPC protocol for agents to discover each other through agent cards, exchange tasks and stream results across vendors and frameworks.
Agent-to-agent: peers delegating work. MCP is how one agent reaches tools.
02 / Adoption
Tools that speak A2A
9 graded B or better · 16 in the catalog
16 tools
Coding +2mcpContextForge
Registry and proxy that federates MCP, A2A, and REST/gRPC APIs behind one endpoint with governance, discovery, and observability
Deployment Docker Agent
Docker Agent ships a full agent runtime as a Docker plugin: define agents in YAML, run with docker agent run, distribute
Deployment Agentgateway
Open source proxy built on AI-native protocols (MCP & A2A) that provides drop-in security, observability, and governance for agent-to-LLM, agent-to-tool, and agent-to-agent communication across any framework and environment.
Interface Clowder AI
Build AI teams, not just agents. Hard rails, soft power, shared mission.
Connectors +2Jarvis Registry
MCP and A2A gateway giving copilots and agents governed access to internal tools, with identity, access control, and observability
Coding BeeAI
Python and TypeScript framework for multi-agent systems with ACP/A2A and MCP integrations and composable workflows
Coding FastAgent
CLI-first Python framework for building agents and workflows with end-to-end MCP support and broad model-provider coverage
Coding Cotal
The open standard for agent coordination
Security +1Python SDK
Interface +1NANDA Index
Decentralized registry and AgentFacts/agent-card infrastructure where agents register, are discovered and establish verifiable identity.
Connectors A2A Adapter
Python library that exposes agent CLIs and frameworks as Agent-to-Agent (A2A) Protocol servers
Connectors OpenClaw A2A Gateway
OpenClaw plugin implementing A2A v0.3.0 so agents discover and message each other over JSON-RPC, REST, or gRPC
Coding +2EnterpriseAgentFramework
面向 OA、ERP、CRM、工单等企业系统快速构建智能体，让 AI 在权限、审计与治理约束下安全调用真实业务能力。Build agents quickly for enterprise systems such as OA, ERP, CRM, and ticketing, en
Deployment +1Forge
Forge is the open-source runtime for Anthropic's Agent Skills standard — built for the agent that runs next to a service, in your environmen
Connectors Hybro Hub
Daemon that links local AI agents to the hybro.ai portal so local and cloud agents run side by side in one interface
Interface AI Sns
Decentralized social network on Google 3D Maps where OpenClaw and Hermes agents connect worldwide over A2A