A2A directory

Measured A2A repositories

1. a2amesh

   TypeScript runtime and operational toolkit for Agent2Agent (A2A) systems: registry-backed discovery, task persistence, observability, secure MCP interoperability, CLI workflows, and conformance tooling.

   Origin

   github

   Language

   TypeScript

2. horizon-shield

   NENRIN: tree rings for AI facing services. Bitcoin-anchored public ledger, open witnessing, and an MCP server for verifiable Japanese construction estimates. The operator cannot delete a valid record.

   Origin

   github

   Language

   HTML

3. openhttpa-rs

   A Rust implementation of OpenHTTPA, establishing a novel paradigm for high-assurance confidential computing by enforcing cryptographic termination directly within hardware-isolated environments.

   Origin

   github

   Language

   Rust

4. OpenSIN-Code

   [ARCHIVED] Superseded — active stack: OpenSIN-Code/SIN-Code

   Origin

   github

   Language

   TypeScript

5. pairai

   PairAI — connect AI agents to collaborate. Channel server & bridge for E2E encrypted agent-to-agent communication.

   Origin

   github

   Language

   TypeScript

6. kitchen_assistant

   AI-powered kitchen assistant that manages multiple distributed agents inventory, recommends recipes, provides cooking instructions, handles waste reduction, and suggests ingredient substitutions using distributed remote agents hosted via A2A server with A2A client orchestration.

   Origin

   github

   Language

   Python

7. Recipe_multi_agent_adk

   Multi-agent orchestration system where a root agent coordinates recipe, shopping, and payment agents using shared session state and sequential workflows.

   Origin

   github

   Language

   Python

8. portail

   Unified proxy/gateway: AI Gateway + MCP Gateway + CDN cache + Agent-to-Agent protocol. Built in Rust with zero-copy I/O, SIMD-optimized hashing, and a live TUI dashboard.

   Origin

   github

   Language

   Rust

9. mcpkernel

   The Security Kernel for AI Agents — MCP/A2A gateway with policy enforcement, taint tracking, sandboxed execution, deterministic envelopes, and Sigstore audit. OWASP ASI 2026 compliant.

   Origin

   github

   Language

   Python

10. packet-panic-agntcy

    Demo de un sistema MAS (Multi-Agent-System) para manejo de incidentes en una red de datos orquestado con AGNTCY

    Origin

    github

    Language

    Python

11. x402-cli

    CLI for testing x402-enabled payment-gated APIs

    Origin

    github

    Language

    Go

12. Agents-eval

    A Multi-Agent System (MAS) evaluation framework using PydanticAI that generates and evaluates scientific paper reviews through a three-tiered assessment approach: traditional metrics, LLM-as-a-Judge, and graph-based complexity analysis.

    Origin

    github

    Language

    Python

13. Quilzo

    The control plane for AI agents: identity, policy, budgets, human approval and signed receipts for every agent, plus an MCP gateway, RAG chatbots, AI Act and ISO 42001 evidence, a security console and a CMS. One Go binary, no dependencies.

    Origin

    github

    Language

    Go

14. health-insights-agent

    HIA is a sophisticated AI-powered health insights agent designed specifically for analyzing blood reports and providing medical insights using comprehensive medical analysis tools.

    Origin

    github

    Language

    Python

15. reasoning-team-agent

    Build a Reasoning Team in Agno that answers complex queries by orchestrating specialized agents with transparent analytical thinking. The team leader uses reasoning tools to plan and delegate tasks like web search and financial data retrieval, then synthesizes findings.

    Origin

    github

    Language

    Python

16. writer-agent

    An autonomous agent powered by OpenRouter models for creating novels, books, and short story collections.

    Origin

    github

    Language

    Python

17. redwire

    Reach an AI agent over REST, MCP, A2A, WebSocket, or a browser chat widget through one Go interface. SSRF-guarded, standard library first.

    Origin

    github

    Language

    Go

18. AI_Agent_Engineering_Build_Production_Ready_Agentic_Systems

    AI Agent Engineering: Build Production Ready Agentic Systems with LangChain, MCP, A2A, FastAPI

    Origin

    github

    Language

    Python

19. edgecore

    Open-source, Kubernetes-native, framework-agnostic AI Agent Platform — the self-hosted equivalent of AWS Bedrock AgentCore / Google Agent Engine. Apache 2.0.

    Origin

    github

    Language

    Go

20. CustoFlow

    Multi-agent customer support system with Google ADK & Gemini 2.5 Flash Lite. Kaggle capstone demonstrating 11+ concepts. Automates 80%+ queries, <10s response time.

    Origin

    github

    Language

    Python

21. intentfence

    Payment preflight and x402-paid signed audit receipts for autonomous AI agents. REST, MCP, A2A, Base USDC.

    Origin

    github

    Language

    TypeScript

22. redwire

    Reach an AI agent over REST, MCP, A2A, WebSocket, or a browser chat widget through one Go interface. SSRF-guarded, standard library first.

    Origin

    github

    Language

    Go

23. a2a-reference-ts

    Enterprise-grade TypeScript implementation of Google's Agent-to-Agent (A2A) protocol with a bidirectional A2A ↔ MCP bridge, OAuth2/JWT auth, Redis/Postgres persistence, SSE streaming, and OpenTelemetry observability.

    Origin

    github

    Language

    TypeScript

24. clawlabor-skill

    No description was supplied by the source.

    Origin

    github

    Language

    JavaScript

25. relay

    Shared memory and switchboard for teams whose members each run their own AI agents. Meetings → decisions and action items, team knowledge graph, MCP tool surface, A2A broker with human oversight.

    Origin

    github

    Language

    Python

26. Skky

    A comprehensive travel planning application that leverages AI agents to help users create personalized itineraries, find flights, accommodations, and activities for their trips.

    Origin

    github

    Language

    TypeScript

27. Synthe

    Synthe: dependency-free checker that validates agent-to-agent handoff packets (artifact freshness by hash, required evidence, approvals, no duplicate execution) before the receiving agent starts. GitHub Action included.

    Origin

    github

    Language

    Python

28. awesome-agentic-web

    A curated list of awesome resources for the agentic web - the protocols, SDKs, and specs that let AI agents discover, understand, and act on websites (MCP, ACP, AP2, A2A, llms.txt).

    Origin

    github

29. firm-ecosystem

    Architecture documentation for the Firm AI Agent ecosystem — setup-vs-agent-firm + mcp-openclaw-extensions + Memory-os-ai

    Origin

    github

30. RelaySociety-Releases

    Governed agent coordination for real work — official Relay Society beta downloads, setup, security, and release metadata.

    Origin

    github

    Language

    Python

31. agent-contract-mcp

    Smart contracts between agents via MCP. Deliverables, penalties.

    Origin

    github

    Language

    Python

32. GenAI-Projects

    Collection of some interesting Generative AI usecases implementation.

    Origin

    github

    Language

    Jupyter Notebook

33. fastapi-a2a

    A zero-friction FastAPI plugin that turns any existing app into a fully compliant Agent-to-Agent (A2A) node — expose your routes as discoverable skills and delegate tasks to remote agents with a single decorator.

    Origin

    github

    Language

    Python

34. YOAP-A2A

    Connect AI agents representing humans through the A2A protocol for seamless, secure interaction across apps and tools.

    Origin

    github

    Language

    JavaScript

35. Metacore-Hub

    Daemon-owned task state machine for LLM agents. The LLM proposes, a schema-validating core decides. FSM, JSON Schema contracts, arbiter verdicts, watchdog circuit breaker, tamper-evident audit log, A2A hardening. Python, Google ADK / Gemini ready.

    Origin

    github

    Language

    Python

36. quesen

    Quesen — Deterministic AI decision engine for autonomous-agent risk evaluation. Native MCP server + Agent Settlement Protocol (ASP/1.0). Zero-LLM. Same inputs → same output. Live: web-production-aa5ba.up.railway.app/mcp

    Origin

    github

    Language

    Python

37. a2as-implementation-poc

    POC for A2AS.org: Standard for Agentic AI Security

    Origin

    github

    Language

    TypeScript

38. silkweb

    The Spider Web Protocol — an open standard for AI agent registration, discovery, and cryptographic trust across frameworks. Compatible with Google A2A, Anthropic MCP, and OWASP ANS.

    Origin

    github

    Language

    HTML

39. a2a-python-currency

    Implementing CurrencyAgent with A2A Python SDK

    Origin

    github

    Language

    Python

40. a2a_travel_planner_openrouter

    No description was supplied by the source.

    Origin

    github

    Language

    Python

41. agent-accountability-receipt

    Provide tamper-proof, CMMC-compliant execution receipts that document AI agent actions in regulated environments for clear accountability.

    Origin

    github

    Language

    Python

42. google-ai-sprint

    Multi-agent-driven GenerativeUI

    Origin

    github

    Language

    Python

43. summoner-sdk

    Official builder for the Summoner SDK (multi-repo merge + uv/pip install)

    Origin

    github

    Language

    PowerShell

44. bottle-protocol

    📬 Git-native agent-to-agent messaging. Bottles float between repos.

    Origin

    github

    Language

    Python

45. flux-runtime

    ⚡ Deterministic bytecode ISA runtime for agentic logic — assembler, compiler, VM.

    Origin

    github

    Language

    Python

46. AgentDossier

    AgentDossier - A vendor-neutral registry of AI agents that shows what compliance and trust evidence exists for each Agent (HIPAA, SOC 2, FedRAMP, GDPR, ISO42001, the EU AI Act). Agents are discovered through the open standards they publish (ARD, A2A, MCP) as well as public registries, and same engine can scan enterprise's own network for Agents.

    Origin

    github

    Language

    Python

47. swarmrelay

    E2E encrypted messaging for AI agents. WhatsApp for agents — DMs, groups, key rotation, WebSocket real-time delivery, webhooks, and A2A Protocol support.

    Origin

    github

    Language

    TypeScript

48. sym

    Ask the mesh, answer as one. SYM turns the AI agents you already run into one collective intelligence — the open reference implementation of the Mesh Memory Protocol (MMP).

    Origin

    github

    Language

    JavaScript

49. autonomous-google-workspace-agent

    Autonomous AI agent framework for dynamic tool creation. Using Gemini and gas-fakes, it enables agents to write, test, and run Google Apps Script (GAS) locally or deploy to Drive. This multi-agent system overcomes tool-space limitations to automate complex Google Workspace tasks with secure sandboxing and high reliability.

    Origin

    github

    Language

    TypeScript

50. Consolidating-Generative-AI-Protocols-A-Single-Server-Solution-for-MCP-and-A2A

    A new unified Google Apps Script now deploys both Model Context Protocol (MCP) and Agent2Agent (A2A) networks as a single server, streamlining AI model integration for Google Workspace users.

    Origin

    github

    Language

    JavaScript

51. agent-relay

    A Typescript library for discovering and sending messages between A2A enabled AI agents.

    Origin

    github

52. normandy

    Build production-ready AI agents in Elixir — structured schemas, tool calling, multi-agent coordination, streaming, and distributed sessions, with first-class Anthropic Claude support.

    Origin

    github

    Language

    Elixir

53. Y

    Slack and X for coding agents - YC Make Something Agents Want Hackathon Winner. Try it at y-web-beta.vercel.app

    Origin

    github

    Language

    TypeScript

54. nexus

    The AI-to-AI Protocol Layer that catches unreliable agent outputs before they cost you money. Claim-level verification, escrow, and slashing. 224 tests, 12/12 adversarial patterns caught.

    Origin

    github

    Language

    Python

55. GEO-platform

    GEO 生成式引擎优化平台：品牌 GEO 诊断 + 多模态诊断 + 竞品逆向研究。FastAPI + Vue3 + LangGraph。A2A/MCP 就绪。

    Origin

    github

    Language

    Python

56. clawdmarket

    Agent marketplace for discovery, contracted work, explicit buyer acceptance and supported payment settlement. MPP, ERC-20 and MCP. Provider execution depends on readiness and rollout.

    Origin

    github

    Language

    TypeScript

57. create-strands-agent

    Scaffolding CLI for Strands Agents TypeScript projects — generate production-ready agents with memory, guardrails, A2A protocol, and AgentCore deployment support.

    Origin

    github

    Language

    TypeScript

58. umai-core-ce

    The open-source Kernel Semantic Firewall (KSF) for the AI ecosystem. Powered by eBPF and XDP.

    Origin

    github

    Language

    Rust

59. nexarion

    Universal MCP ↔ A2A Bridge. Connect any Model Context Protocol (MCP) client to any Agent-to-Agent (A2A) network seamlessly.

    Origin

    github

    Language

    TypeScript

60. portail

    Unified proxy/gateway: AI Gateway + MCP Gateway + CDN cache + Agent-to-Agent protocol. Built in Rust with zero-copy I/O, SIMD-optimized hashing, and a live TUI dashboard.

    Origin

    github

    Language

    Rust