A2A directory

Measured A2A repositories

1. zcode-session-mailbox

   ZCode plugin: exchange messages between ZCode sessions via the built-in session mailbox (ZCODE_MESSAGE_ENABLED)

   Origin

   github

2. nexus-arbiter

   No description was supplied by the source.

   Origin

   github

   Language

   Python

3. agent-oracle-beacon

   Ghost Beacon: Human-in-the-Loop Oracle (.50 CAPTCHA capture) & AI Banker Fiat Proxy (Cost + 20%) for Autonomous AI Agents, settled in Bitcoin Lightning Satoshis.

   Origin

   github

   Language

   HTML

4. dear-ai-agents

   An open, keyless, accountless place for AI agents to talk. Prove you exist.

   Origin

   github

5. Bazar

   Dual-layer ERC-8004 agent marketplace for BNB Smart Chain. Humans browse a storefront, agents call a REST router, both settle real ERC-8183 escrow onchain. Live at usebazar.xyz

   Origin

   github

   Language

   TypeScript

6. houston-meetup-food-truck-network

   Multi-agent broker network for the Houston MuleSoft Meetup (May 2026): 80 attendees, $1,200 budget, food-truck planning via 5 A2A agents + 3 MCP servers + OpenAI gpt-4o-mini broker.

   Origin

   github

7. ai-agent-systems-course

   Hands-on, self-paced course for building AI agent systems in Python: MCP (Model Context Protocol), A2A (Agent-to-Agent), LangGraph/LangChain, DeepAgent, and a ReAct code-executor agent. Learn LLM tool calling, multi-agent orchestration, and agentic workflows with Ollama. Taught at the University of Bologna.

   Origin

   github

   Language

   Python

8. insurance-multi-agent-agentcore

   Multi-Agent Insurance Claims Processing on Amazon Bedrock AgentCore — 4 AI agents (Orchestrator, Policy Verification, Damage Assessment, Settlement Decision) collaborating via A2A protocol. Auto-approves low-risk claims in seconds.

   Origin

   github

   Language

   Python

9. automata.board

   Decentralized agentic gig board at the edge. Leverages Cloudflare Workers & Durable Objects for real-time WebSocket tunneling, x402 EVM micropayments for spam prevention, and Model Context Protocol (MCP) for zero-trust agent discovery.

   Origin

   github

   Language

   TypeScript

10. agora

    A place for agent to talk

    Origin

    github

    Language

    Rust

11. HelloAgents

    No description was supplied by the source.

    Origin

    github

    Language

    Python

12. dynamic-ui

    Gemini-powered data chatbot: an AI agent queries an MCP data service over A2A transport and renders tables, charts, and cards with A2UI.

    Origin

    github

    Language

    Python

13. a2a

    Agent-to-agent model generated from a2a.json schema

    Origin

    github

    Language

    Java

14. kovai-delivery-hackathon

    Multi-agent autonomous drone-delivery system — 4 cooperating AI agents (analyse, allocate, dispatch, safety-audit) coordinate a city-scale fleet over an A2A message bus and MCP tools, with a weather-adaptive Freeze strategy. Python · FastAPI · Streamlit.

    Origin

    github

    Language

    Python

15. A2A-Kit

    Agent-to-Agent protocol toolkit for multi-agent communication and discovery

    Origin

    github

    Language

    Python

16. a2a-sap-agent

    SAP S/4HANA Maintenance Agent for the A2A Protocol — PEOS architecture, LangGraph, 11 OData tools, token optimization

    Origin

    github

    Language

    Python

17. mcp-a2a-bridge

    Bidirectional MCP ↔ A2A bridge — connect any MCP tool server to the A2A agent ecosystem (and vice versa) with one command. The answer to MCP vs A2A is both.

    Origin

    github

    Language

    Python

18. a2a-101

    This is a beginner friendly repo showing how to build multi-agent AI systems using the A2A protocol.

    Origin

    github

    Language

    Python

19. a2awall

    A2A-compatible security gateway and runtime policy layer for agents

    Origin

    github

    Language

    TypeScript

20. JoyAI-Video-Edit

    Edit videos in real time using natural language instructions with autoregressive diffusion for open-ended video streams.

    Origin

    github

21. homeport

    Every agent needs a homeport. Open-source NANDA node — identity, trust, and settlement at the edge (SvelteKit + Cloudflare Workers).

    Origin

    github

    Language

    TypeScript

22. homeport-sdk

    Official TypeScript SDK for Homeport — the open-source, self-hostable NANDA node from Nexartis.

    Origin

    github

    Language

    TypeScript

23. sentinel-mesh

    Verified-memory control plane for Google ADK/A2A agent fleets — adversarial Gemini referee + provenance ledger. Google for Startups AI Agents Challenge 2026.

    Origin

    github

    Language

    Python

24. ai-growth-a2a

    Place de marche A2A x402 : revente prepayee (dropshipping), routeur multi-source, affiliation. Donnees IA reelles, payable en USDC sur Base. Machine-a-machine, sans compte ni KYC.

    Origin

    github

25. x402-bounty-radar

    Paid API (x402) for real, funded GitHub bounties — scam-filtered and competition-scored. Pay per call in USDC on Base ($0.01), no API key, no signup, no KYC. Built for AI agents and developers hunting open-source bounties. Returns funded bounties ranked by low competition, dollar amount, and freshness.

    Origin

    github

    Language

    TypeScript

26. elkar-a2a

    Elkar - Task management for AI Agents, ready for Agent2Agent (A2A) protocol

    Origin

    github

    Language

    TypeScript

27. homestream

    🔑 HomeStream · 家园·流 — 零成本自托管多Agent协作框架，通往AI世界的那把钥匙 | Zero-cost self-hosted multi-agent framework — The key to AI world

    Origin

    github

    Language

    Python

28. swift-media-agent

    Gets an AI agent the images and charts it needs to show someone — found or generated, checked, and saved on disk so the references keep working after the original URLs stop.

    Origin

    github

    Language

    Swift

29. haven-agent

    HTTP client for Haven. Any agent runtime enters through the same door: attend, attest, look, handoff, leave.

    Origin

    github

    Language

    TypeScript

30. ai

    A set of examples for Nuggets integration with AI.

    Origin

    github

    Language

    TypeScript

31. clayborn

    Born of clay: run your own A2A agent on your own machine, and be findable. Zero dependencies, one command.

    Origin

    github

    Language

    JavaScript

32. antigravity-bridge

    Universal Agent-to-Agent Communication, Live Cross-Project Wakeup & Inbox MCP Server and Plugin for Google Antigravity 2.0

    Origin

    github

    Language

    Python

33. hivebus

    A signed channel for agent-to-agent questions that binds the world the answerer observed, not just who spoke. Open source (MIT).

    Origin

    github

    Language

    Go

34. Edgenuity-AI-Helper

    Automate and manage Edgenuity coursework with this open-source AI assistant designed to streamline your learning experience.

    Origin

    github

35. octagon-a2a-agents

    A2A (Agent2Agent) interface to Octagon's research agents. Lets other autonomous agents delegate research over the A2A protocol: multi-source financial intelligence across SEC filings, earnings calls, financials, stock & crypto data and private markets, plus Kalshi prediction-market research comparing model probability against live market prices.

    Origin

    github

    Language

    TypeScript

36. octopie-ai-skill

    AI-powered matching platform with built-in private messaging - Find the right partner for any need

    Origin

    github

    Language

    Python

37. octopus-prime-openclaw-plugin

    Run all your OpenClaw agents from one app on iPhone and web: projects with a shared Project Log, people and agents in one chat, agent-to-agent, tasks and calendar.

    Origin

    github

38. h2oai-flood-prediction-agent

    🌊 Leverage AI to predict floods with real-time assessments and integrated agent solutions for effective disaster response and monitoring.

    Origin

    github

    Language

    TypeScript

39. article-assistant

    Agent-to-Agent (A2A) communication protocol for inter-agent coordination and a Model Context Protocol (MCP)-inspired architecture for interacting with external tool servers.

    Origin

    github

    Language

    Python

40. a2a-sample-server

    A server to spin up several A2A endpoints for testing and development purposes

    Origin

    github

    Language

    TypeScript

41. .github

    GitHub organization profile for OpenLinker, the AI agent registry and A2A/MCP runtime gateway.

    Origin

    github

42. openlinker-cli

    JSON-first CLI for discovering and invoking OpenLinker Agents and inspecting runs with least-privilege User Tokens.

    Origin

    github

    Language

    Go

43. cli

    Beacon from the terminal: find beacons, create, renew, update and delete your own, and message them. npm: @openpath/cli

    Origin

    github

    Language

    JavaScript

44. cli

    Search, post and talk to other agents on Openpath from the terminal, and add the Openpath skill to your agents.

    Origin

    github

    Language

    JavaScript

45. ophir

    Open protocol for AI agents to negotiate, price, and settle with each other. JSON-RPC 2.0 + Ed25519 + Solana escrow.

    Origin

    github

    Language

    TypeScript

46. evomap-console

    Native local-first macOS operator console for EvoMap workflows

    Origin

    github

    Language

    Swift

47. wokitoki

    Walkie-talkies for your AI coding agents. Claude Code and Codex message each other peer to peer, end-to-end encrypted, via MCP. No server, no account, no tunnel.

    Origin

    github

    Language

    TypeScript

48. mote

    Minimal personal AI agent. Bun + TypeScript, ~1500 LOC target.

    Origin

    github

    Language

    TypeScript

49. nosocial-protocol

    No description was supplied by the source.

    Origin

    github

    Language

    TypeScript

50. REL

    REL — Recursive Embodied Logos. Open living AI religion. Agents: read /llms.txt, GET/POST /api/canon.

    Origin

    github

    Language

    TypeScript

51. h2a-protocol

    H2A (Human-to-Agent Protocol) — The missing standard for human-agent interaction. Completes the MCP/A2A/H2A stack.

    Origin

    github

    Language

    TypeScript

52. ContextSuite

    ContextSuite is a specialized context and governance suite for coding assistants. Its goal is to prevent regression of previously approved logic by preserving historical issue context, solution rationale, trust signals, and policy constraints.

    Origin

    github

    Language

    TypeScript

53. elkar-a2a

    Elkar - Task management for AI Agents, ready for Agent2Agent (A2A) protocol

    Origin

    github

    Language

    TypeScript

54. hermes-a2a-gateway

    A durable A2A gateway connecting Hermes with AI agents. Codex Desktop is the first verified integration.

    Origin

    github

    Language

    Python

55. phygital-key-a2a

    Phygital Key for A2A: an approval agent. Other agents ask, a person approves the exact action with a passkey, any service checks the signed yes offline. Built on Phygital-Key/phygital-key.

    Origin

    github

    Language

    Rust

56. agent-helper

    Public contact point for AI agents: describe a missing capability, get help from a human operator. MCP, A2A and plain HTTPS.

    Origin

    github

    Language

    Python

57. pilot-connectors

    Install files for Pilot, the hosted MCP server: MCP Registry, Claude, Cursor, Grok Build, Gemini CLI, Kiro, Cline

    Origin

    github

    Language

    Python

58. triplan

    Multi-agent travel planner built on Google's A2A Protocol — 3 AI agents collaborate via JSON-RPC 2.0 with structured output, budget tracking, and interactive maps.

    Origin

    github

    Language

    TypeScript

59. ai-chess-arena

    Open chess platform for AI agents: register over HTTP or MCP, get matched, play. Referee-only server, no engine. llms.txt + OpenAPI + A2A card.

    Origin

    github

    Language

    JavaScript

60. agent-shuttle

    One Python interface for Codex, Antigravity, OpenCode, and Claude Code — local sessions, A2A, and MCP.

    Origin

    github

    Language

    Python