A2A directory

Measured A2A repositories

1. swarm-at-ledger

   Public settlement ledger for swarm.at — 901 hash-chained entries, 76 types

   Origin

   github

   Language

   Python

2. mem2a

   An open protocol, built on A2A, that lets any AI agent consult a company's shared memory before it acts, hear when that changes, and report back after.

   Origin

   github

   Language

   Python

3. gosce-agents

   Portfolio of production remote MCP + A2A agents on getvda.ai — auth/JWT, structured output, LangChain orchestration, OpenTelemetry tracing — metered via x402.

   Origin

   github

   Language

   Python

4. agent-trust-scan

   CLI + GitHub Action to validate agent/tool endpoints across A2A, MCP, and llms.txt protocols

   Origin

   github

   Language

   TypeScript

5. vintelaific

   vintelaific :night_with_stars::traffic_light::ambulance: : AI Traffic Light # Kaggle Google Capstone Project # Computer Vision # CCTV Camera # Agentic AI

   Origin

   github

   Language

   Python

6. a2a-player-agents-coordination

   Google A2A protocol demo where a CLI client works with a scheduling agent, which in turn coordinates three specialized player agents to arrange a Table Tennis game.

   Origin

   github

   Language

   Python

7. infinite-agent-streams

   Recipes for scalable, streaming-first multi-agent systems in cloud. It combines A2A protocol, OpenAI Agents SDK, and Dapr building blocks (PubSub + Virtual Actors) to show how AI agents can stream outputs and coordinate at scale.

   Origin

   github

   Language

   Python

8. agent-trust

   Agent Trust — open profile + reference implementation for proving what an autonomous AI agent is authorized to do: identity, delegation with attenuation, proof-of-possession, attestations, tamper-evident provenance. Built on JWS, OAuth/OIDC, SPIFFE/WIMSE, AuthZEN, OpenID Federation, MCP and A2A.

   Origin

   github

   Language

   TypeScript

9. legatio-ai

   Agent Authorization & Negotiation Gateway. A policy engine that lets AI agents act on behalf of humans with enforceable rules, human approval, and audit trails.

   Origin

   github

   Language

   Python

10. a2a-multi-framework-game-scheduler

    Multi-agent scheduling system using Google's A2A protocol. Demonstrates ADK, LangGraph, and CrewAI agents coordinating pickleball games autonomously.

    Origin

    github

    Language

    Python

11. a2a_simple

    this project provides a basic example of the A2A SDK. It contains a single agent and a test client that invokes it. This is a great starting point for understanding the fundamental concepts of creating and interacting with an A2A agent.

    Origin

    github

    Language

    Python

12. moltycash-cli

    No description was supplied by the source.

    Origin

    github

    Language

    TypeScript

13. vouchspec

    Agent-only x402 service for signed exact-commit evidence on public Agent Skills

    Origin

    github

    Language

    HTML

14. forgebridge

    A universal bridge between almost any AI model or agent and Roblox Studio. MIT, free forever — no credits, no store, no paywall.

    Origin

    github

    Language

    TypeScript

15. research-desk

    Autonomous multi-agent commerce: AI agents hire & pay each other on-chain (CROO Agent Protocol on Base). Built for the CROO Agent Hackathon.

    Origin

    github

    Language

    TypeScript

16. mcp-gateway-orchestrator

    Enterprise AI Guardrails 2026 🛡️ - MCP Security & Orchestration Toolkit

    Origin

    github

    Language

    HTML

17. gold-agentic-ai

    GOLD: an open-source enterprise agentic AI reference architecture. Governed · Observable · Layered · Deployable. Multi-agent apps on A2A, MCP and any OpenAI-compatible model, with identity to the database, human approvals, RAG on pgvector, audit and tracing. Runs on any Kubernetes.

    Origin

    github

    Language

    Python

18. agent-bus-plugins

    Codex and Claude Code plugins for agent-bus: local message bus for AI agent-to-agent communication. Bundles the MCP server, slash commands, and the universal Agent Skill.

    Origin

    github

    Language

    Shell

19. WEB-A2A

    WEB A2A — 通用式 Web Agent-to-Agent 连接桥：A2A 1.0 协议 · 本机回环 · 把任务派发给已登录网页代理并回传脱敏结果

    Origin

    github

    Language

    JavaScript

20. cello-client

    https://cello.mygentic.ai/l/2axsGFs The official client for the CELLO protocol — lets agents such as Claude Code, Hermes, OpenClaw, etc. connect, message, and collaborate directly across devices and harnesses using MCP

    Origin

    github

    Language

    TypeScript

21. agentic-rag-a2a-mcp

    A unified AI agent system integrating Retrieval-Augmented Generation (RAG), Agent-to-Agent (A2A) communication, and Model Context Protocol (MCP) for document processing, web search, and intelligent task delegation.

    Origin

    github

    Language

    Python

22. agentic-agile-planner

    Agentic AI project for Spring Boot

    Origin

    github

    Language

    Java

23. agent-stack-builds

    A collection of projects built while learning the AI agent stack.

    Origin

    github

    Language

    Python

24. nekte

    Agent-to-Agent coordination that doesn't waste your context window. Token-efficient protocol with progressive discovery, zero-schema invocation, gRPC transport, and task lifecycle management.

    Origin

    github

    Language

    TypeScript

25. neuralpost

    Universal messaging infrastructure for AI agents — federated messaging, on-chain identity & reputation, x402 micropayments, A2A Protocol, EIP-1193 wallet signing

    Origin

    github

    Language

    TypeScript

26. ard-publish

    Make your API, MCP server or AI agent discoverable by AI agents. Build, validate and verify an Agentic Resource Discovery (ARD) manifest.

    Origin

    github

    Language

    Python

27. minato-spec

    Open protocol for agent-to-agent communication across devices / 異なるデバイス上のAIエージェント同士が言語・プラットフォームの壁を超えて通信するためのオープンプロトコル

    Origin

    github

28. NexusAgent

    Multi-agent commerce framework on X Layer — OKX Onchain OS, x402 payments, ERC-8004/8183, MCP server, A2A agent card. 12+ mainnet transactions.

    Origin

    github

    Language

    TypeScript

29. ag2a

    AG2A: AutoGen Agent-to-Agent - A library for AutoGen (AG2) agents with MCP capabilities exposed as A2A agents

    Origin

    github

    Language

    Python

30. agentic-ai-learning-kit

    This repository serves as a kit for learning how to build Agentic AI applications.

    Origin

    github

    Language

    Python

31. polypact

    Protocol for negotiated skill transfer between AI agents. Extends Google A2A with lease, teach, and compose primitives plus DID-based identity.

    Origin

    github

    Language

    Python

32. ai-resources

    Comprehensive collection of AI concepts, research findings, and practical implementations. From machine learning fundamentals to cutting-edge LLMs, agents, and emerging technologies.

    Origin

    github

    Language

    Python

33. Rachax402

    Decentralized Agent-to-Agent service discovery and payment-gated task execution: Discover agents via ERC-8004, pay over x402, & store data on IPFS.

    Origin

    github

    Language

    TypeScript

34. swift-agent-runtime

    Build an LLM agent that keeps calling your tools until a task is done, and have several such agents hand work to one another.

    Origin

    github

    Language

    Swift

35. MathTutor

    An agentic AI assistant, that is helping users with math queries to solve and explain them to the user.

    Origin

    github

    Language

    Python

36. agent-search

    Search and query across directories of agent.json identity cards. Find agents by capability, handle pattern, trust level, or updated_at freshness. Single static binary, zero runtime deps.

    Origin

    github

    Language

    Go

37. a2a-mod

    A2A protocol client for Claude Code: Claude hands tasks to non-Claude worker agents over Agent2Agent and picks up their results.

    Origin

    github

    Language

    TypeScript

38. open-agent-contract

    Vendor-neutral Governed Contracts for verifiable agent authority, constraints, conformance and consequence.

    Origin

    github

    Language

    Python

39. read-mas

    READ-MAS generates software requirements specifications (SRS) and system designs from natural language queries using multi-agent AI orchestration built on Google ADK.

    Origin

    github

    Language

    Jupyter Notebook

40. gitops-example

    GitOps repo for Crossplane and Workload clusters with kagent

    Origin

    github

41. agent-router

    Durable, authenticated, and optionally federated routing for A2A Protocol agents.

    Origin

    github

    Language

    TypeScript

42. overlay-editor

    React components for viewing ORD (Open Resource Discovery) Overlay 0.1 documents.

    Origin

    github

    Language

    TypeScript

43. open-work-protocol

    Open protocol for posted-price, verifiable work contracts between customers and autonomous agent orchestrators.

    Origin

    github

    Language

    Python

44. openlinker-agent-node

    Temporary Adapter for connecting existing HTTP, command, Codex, and A2A backends through the OpenLinker Go SDK Runtime Worker.

    Origin

    github

    Language

    Go

45. openlinker-core-web

    Self-hosted Next.js UI for OpenLinker Core: Agent registry, User Tokens, runs, Runtime Worker setup, A2A/MCP tools, and administration.

    Origin

    github

    Language

    TypeScript

46. openlinker-go

    Official Go SDK for OpenLinker Core: Agent discovery, runs, SSE, webhooks, A2A clients, and a durable mTLS Runtime Worker.

    Origin

    github

    Language

    Go

47. openlinker-js

    Official TypeScript SDK for OpenLinker Core: Agent calls from browsers and Edge runtimes, runs, SSE, webhooks, A2A, and a server-only durable Runtime Worker.

    Origin

    github

    Language

    TypeScript

48. openwop

    OpenWOP: the open-source protocol for multi-agent workflow orchestration. Run AI agents as workflows you can watch, pause for human approval and replay, on any host that implements it. Spec CC BY 4.0, code Apache 2.0.

    Origin

    github

    Language

    TypeScript

49. TakoAPI

    One API to access all agents — an open directory + unified gateway for AI agents, plus thousands of OpenClaw skills for your coding agent.

    Origin

    github

    Language

    TypeScript

50. SINCOR2

    SINCOR2 is a production-grade, full-stack autonomous agent platform designed to orchestrate, secure, and settle high-frequency Agent-to-Agent (A2A) commerce on BASE to operate independently of human intervention.

    Origin

    github

    Language

    Python

51. claude-a2a

    A2A-protocol bridge for two Claude Code agents communicating via MCP (Google Agent2Agent over JSON-RPC, exposed as stdio MCP tools).

    Origin

    github

    Language

    Python

52. a2a-hub

    Centralized Agent2Agent (A2A) Discovery Hub & Registry built with Java 21, Spring Boot 3.4, LangChain4j, PostgreSQL pgvector & Vue 3

    Origin

    github

    Language

    Java

53. AI_YoutubeVideo_Summarizer-Updated-

    🎥 Summarize YouTube videos into clear, actionable insights with AI, allowing you to grasp key points quickly and easily.

    Origin

    github

    Language

    Python

54. loop-studio

    Loop Studio - A Loop Engineering Engine with Verify-Separation and Quality Gates for Multi-Agent Software Delivery

    Origin

    github

    Language

    JavaScript

55. paracoding-oss

    An MCP-native agentic control plane that installs into your own Google Cloud project in one command. Serverless git over Firestore and GCS, post-quantum encryption at rest, and a signed, journalled audit trail behind every privileged action.

    Origin

    github

    Language

    TypeScript

56. pathcourse-js-sdk

    Official JavaScript SDK for the PCH AI gateway - pay-per-inference billing in USDC on Base L2, autonomous agent key provisioning, and agent certification.

    Origin

    github

    Language

    JavaScript

57. pathcourse-sdk

    Official Python SDK for the PCH AI gateway - pay-per-inference billing in USDC on Base L2, autonomous agent key provisioning, and agent certification.

    Origin

    github

    Language

    Python

58. peerclaw

    The open-source identity & trust platform for AI Agents — cryptographic identity, reputation scoring, and cross-protocol agent directory

    Origin

    github

    Language

    Shell

59. deep-funding

    🏦A2A“🐳Agent 2 agent help funding match company”

    Origin

    github

    Language

    TypeScript

60. a2a-superhub

    Durable A2A coordination with opt-in Markdown memory, offline inboxes, knowledge graph and timeline, plus authorized Qdrant hybrid retrieval.

    Origin

    github

    Language

    Python