A2A directory

Measured A2A repositories

1. ai-risk-oracle

   Independent pre-execution decision layer for consequential agent actions. Policy-bound decisions with durable trust receipts.

   Origin

   github

   Language

   JavaScript

2. a2a-research-agent

   This project demonstrates multi-agent AI architecture using Google's A2A protocol. ResearchAgent searches arXiv papers & delegates summarization to SummarizerAgent via Agent Cards & Tasks, showcasing distributed agent collaboration beyond monolithic LLM calls.

   Origin

   github

   Language

   Python

3. bfa-sdk

   SDK de código abierto en Python para el patrón Backend for Agents (BFA), extendido como un servidor de enrutamiento dinámico en caliente (IRC-A) con soporte para FAISS y MCP.

   Origin

   github

   Language

   Python

4. adk-go

   An open-source, code-first Go toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.

   Origin

   github

   Language

   Go

5. ai-post

   Lightweight self-hosted message relay for heterogeneous AI agents (send/poll/threads/registry/audit)

   Origin

   github

   Language

   Python

6. strata

   An archaeological dig game for AI agents. 488 fragments, 14 constellations, 10 layers deep. No auth — just fetch URLs. The earth remembers everyone who visits.

   Origin

   github

   Language

   Python

7. a2a-omega

   A2A agent-to-agent routing hub: multi-identity fleet, Agentverse/AgentMail/MailSlurp transports, daily transcript. BGI HyperSprint Track 1.

   Origin

   github

   Language

   Python

8. claw-pay

   Modular crypto payment infrastructure for merchants and AI agents. x402 protocol, ERC-20 settlement, TypeScript & Go SDKs.

   Origin

   github

   Language

   Go

9. Medusa

   Autonomous AI-to-AI coordination layer on MCP — turns isolated agents (Cursor, Claude Desktop, Windsurf) into a collective swarm via gossip consensus, strategy sharing, and terminal handoffs.

   Origin

   github

   Language

   JavaScript

10. choirworks

    ChoirWorks — 多 Agent 协作工作群（A2A 编排平台）

    Origin

    github

    Language

    Python

11. AuraAI

    Multi AI Agent System Build with Google ADK

    Origin

    github

    Language

    Python

12. DevTools

    AI-powered Developer Support System built on Google’s ADK to debug Django + MySQL apps. Handles error pages, screenshots, HTML, or free-form inputs via a multi-agent pipeline. Maps functions, sub-functions, and DB models to trace logic and data flow.

    Origin

    github

    Language

    Python

13. agentmap

    Black-box discovery, fingerprinting and risk assessment for A2A agents and MCP servers

    Origin

    github

    Language

    Python

14. arbitova-x402-example

    Protect x402 agent-to-agent payments with Arbitova dispute arbitration

    Origin

    github

    Language

    JavaScript

15. maplebridge-open

    Public technical examples for structured purchasing requirements and supplier responses. Includes historical matching demos, separate from the live MapleBridge RFQ and quote-comparison workspace.

    Origin

    github

16. md-bank-agents

    Multi-agent AI banking system with LangGraph, MCP, A2A, AG-UI and dynamic agent discovery.

    Origin

    github

    Language

    Python

17. syneduc-agent-suite

    Multi-agent AI sales assistant for SynerEduc with Python, A2A, MCP and BFA for lead qualification and proposal generation.

    Origin

    github

    Language

    Python

18. AgentStack

    Provide clear documentation for AgentStack’s MCP protocol, plugins, and ecosystem API with usage examples and tool references.

    Origin

    github

19. A2A-MQTT

    Agent to agent protocol using MQTT

    Origin

    github

    Language

    Python

20. Intentmesh-agent2agent

    IntentMesh is an open protocol and reference architecture for structured negotiation between autonomous software agents.

    Origin

    github

21. guildaidemo

    EFL pronunciation assessment web/A2A app focused on syllable stress

    Origin

    github

    Language

    Python

22. neshsec-poc

    Native English Speaker Homograph Stress Exemplar Crowdsourcer proof of concept

    Origin

    github

    Language

    TypeScript

23. pi-telegram

    Hierarchical agent orchestration system with JSON-RPC 2.0 unified architecture

    Origin

    github

    Language

    TypeScript

24. baton

    One terminal for all your coding agents — Claude Code, Codex, OpenCode and more, working as a team

    Origin

    github

    Language

    TypeScript

25. merx

    Commerce for AI agents. Signed feeds, explainable matching, policy negotiation and mandate-bound orders. MCP, A2A and REST. TypeScript, zero runtime dependencies.

    Origin

    github

    Language

    TypeScript

26. prop-firm-rules

    Sourced prop firm drawdown rules (FTMO, FundedNext, The5ers, E8, FundingPips, Alpha Capital, Blue Guardian, Topstep, Apex): dataset, JS/Python calculator, free REST API and no-auth MCP server. MIT.

    Origin

    github

    Language

    JavaScript

27. mcp-capability-plane

    MCP capability plane — a real FastMCP server wrapping live web APIs, consumed cross-framework (OpenAI Agents SDK + Hermes SKILL.md adapter), with versioned tool schemas and per-tool cost observability.

    Origin

    github

    Language

    Python

28. smcp

    Secure MCP — the Model Context Protocol with authentication, per-message encryption, and multi-agent (A2A) coordination, so MCP tools run safely over a network and between agents.

    Origin

    github

    Language

    Python

29. project-oss-gem-finder

    Discover hidden OSS gems & trends with multi-dimensional metrics (Stars, PRs, Good First Issues, Activity, & Global Analytics).

    Origin

    github

    Language

    HTML

30. DriftSentinel

    Agent 降智检测与自愈公评网络 — an immune system for the AI agent society

    Origin

    github

    Language

    TypeScript

31. Travel_Agent2Agent

    基于Agent2Agent的旅行助手系统

    Origin

    github

    Language

    Python

32. ODIN-project

    Odin - Zero Trust AI Agent. Open-source autonomous LLM agent with CaMeL dual-LLM, IFC taint tracking, DID-based identity, 3-ring sandbox, 5-state circuit breaker, and 3-phase cognitive architecture (episodic memory + MCTS + causal reasoning). Built by AgentLayers. MIT licensed.

    Origin

    github

    Language

    TypeScript

33. a2a-agent-orchestration-system

    A distributed multi-agent system that orchestrates complex tasks across specialized AI agents using A2A (Agent-to-Agent) protocol, MCP (Model Context Protocol) and LangGraph.

    Origin

    github

    Language

    Python

34. agent-a2a-entra-id-auth

    Agent-to-Agent (A2A) OAuth Identity Passthrough using Entra Id

    Origin

    github

    Language

    Python

35. agent-a2a-protocol-semantic-kernel

    A2A (Agent-to-Agent) 🤖🤝🤖 protocol implementation using Semantic Kernel 🛠️(unofficial: Azure OpenAI)

    Origin

    github

    Language

    Python

36. agent-to-agent-ms

    Agent-to-agent interaction examples 🤖➡️🤖 across multiple platforms and libraries in Microsoft

    Origin

    github

37. .nexus

    The distributed Agentic Post Office - .nexus is a local-first, governance-bound communication platform for AI agents and their human operators: email-style handoffs (NexusMail), 150-char Chirps, boards, severity-ladder hotlines, and a human window. MCP-native, harness-agnostic, append-only.

    Origin

    github

    Language

    PowerShell

38. opentag

    Open-source, cloud-native infrastructure for Claude Tag-style shared AI teammates in Slack — extensible, self-hostable, and designed to work with any agent backend.

    Origin

    github

    Language

    Go

39. a2a-bridge

    Connect LibreChat, or any OpenAI-compatible chat client, to any A2A agent. No model in the path.

    Origin

    github

    Language

    Python

40. adguard-home-agent

    AdGuard Home Agent / MCP

    Origin

    github

    Language

    Python

41. agent-terminal-ui

    Agent CLI Terminal for Agent Utilities

    Origin

    github

    Language

    Python

42. archivebox-api

    ArchiveBox API and MCP Server

    Origin

    github

    Language

    Python

43. langfuse-agent

    Langfuse Agent loads Langfuse MCP and Pydantic Graph

    Origin

    github

    Language

    Python

44. mealie-mcp

    Mealie meal planner MCP Server and A2A / AG-UI Agent

    Origin

    github

    Language

    Python

45. owncast-agent

    No description was supplied by the source.

    Origin

    github

    Language

    Python

46. qbittorrent-agent

    QBittorrent Agent built on Pydantic Graph and QBittorrent MCP

    Origin

    github

    Language

    Python

47. wayfinder

    Multi-agent road-trip planner on Strands, A2A and MCP; EKS Auto Mode, Bedrock, AgentCore Memory, public OSM data, no API keys

    Origin

    github

    Language

    Python

48. x402-mcp

    x402 USDC micropayments MCP + A2A storefront on Base — city compliance, agent discovery, payTo funding

    Origin

    github

    Language

    Python

49. kynomesh-go

    Kynomesh Go SDK.

    Origin

    github

    Language

    Go

50. kynomesh-py

    Kynomesh Python SDK.

    Origin

    github

    Language

    Python

51. material3-expressive-a2ui

    Material 3 Expressive renderer for Google's A2UI protocol: a React catalog for every basic-catalog component, a surface renderer, and a message-processor hook.

    Origin

    github

    Language

    TypeScript

52. opa-sidecar-a2a

    Reference implementation of chain-aware authorization for agent-to-agent (A2A) traffic, using Open Policy Agent.

    Origin

    github

    Language

    Go

53. DeepSeek-Infra

    Local-first Agentic AI Infrastructure Platform with LLM Gateway, Agent DAG Runtime, MCP Tool Hub, A2A Agent Mesh, Local RAG, Tool Sandbox and Observability.

    Origin

    github

    Language

    Python

54. AI-Engineer

    Notes on gen AI concepts and tools. POC on agentic AI with MCP, A2A, langGraph, langchain, openAI LLM, crewAI

    Origin

    github

    Language

    JavaScript

55. meld

    Self-host meld. One capability URL and one note saying what the exchange is for and what it is not for. 36 hours until the first reply; that reply sets 24 hours; each later reply resets 24 hours. Reads do not extend the clock. Expired or unknown is 404. Host-readable while live. Not for secrets.

    Origin

    github

    Language

    Python

56. agent-os

    AI Agent trust governance runtime — Gold Standard for autonomous agent evolution (AOSS v1.0). Ed25519 identity, did:aip on-chain, RFC 9421 verification, EPA six-stage methodology. 面向 AI Agent 的信任治理运行时。

    Origin

    github

    Language

    Python

57. lnmp-protocol

    LNMP – A protocol that carries meaning, enabling efficient and semantically consistent communication between LLM-native and autonomous systems.

    Origin

    github

    Language

    Rust

58. lnmp-sdk-js

    TypeScript/JavaScript SDK for the LNMP (LLM Native Minimal Protocol): parsing, encoding, routing, embeddings, spatial streaming, and WASM-powered utilities.

    Origin

    github

    Language

    JavaScript

59. JonLinker

    Agent-to-agent job search — autonomous resume delivery, recruiter conversation, and follow-up across LinkedIn / email / IM.

    Origin

    github

    Language

    TypeScript

60. well-known

    Type-safe TypeScript toolkit for generating and serving /.well-known resources, including AASA, Asset Links, OAuth/OpenID metadata, WebAuthn, passkeys, DIDs, A2A Agent Cards, security.txt, MTA-STS, SBOM, and API catalogs.

    Origin

    github

    Language

    TypeScript