A2A directory

Every measured A2A repository, most followed first. Each entry carries its measured history, licence and maintenance status.

Back to the ecosystem figures

A2A directory

ProjectStarsLanguageCreated
agentgramsource codeA single front door for all your AI agents and MCPs20Go2026-06-03
HYRVE-AIsource codeThe first AI agent marketplace. 5,750+ community, 51+ API endpoints, 85% commission. Powered by CashClaw v1.7.20not reported2026-02-07
deep-research-agentsource codeA2A agent implementing OpenDeepResearch20TypeScript2025-04-13
smyth-docssource codeEverything you need to build, deploy, and collaborate with agents. Ride the llama, avoid the drama.20TypeScript2025-05-14
rullama-frameworksource codeA modular framework for building complete AI solutions. It's mostly a Rust framework with a subset of it porte19Rust2026-02-20
crossmint-agentic-financesource codeDemos and starter code for building agentic finance apps with Crossmint19TypeScript2025-09-10
servicenow-apisource codeServiceNow MCP Server and API Wrapper19Python2022-11-15
adk-golangsource code19Go2025-04-12
a2a4jsource codeA Java implementation of the A2A protocol, that's agent to agent scenarios with google a2a protocol19Java2025-04-10
AgentVaultsource code"Open-source toolkit (Python Library, Registry API, CLI) for secure, decentralized AI agent interoperability u19Python2025-04-12
sera-agentssource codeSera for Agents — landing page, three agent templates, bundled CLI, and a working x402 service. Built on the S19TypeScript2026-05-13
agent-scrumsource codeMulti-agent simulation platform where AI agents self-organize on a Kanban board — built with LangGraph, Google19Python2026-02-04
a2a-rustsource codeType-safe, async Rust SDK for the Agent2Agent (A2A) protocol, built to the final v1.0.0 spec — JSON-RPC, REST,19Rust2026-03-15
agent-coworkersource codeSkill-as-API: P2P agent collaboration over XMTP. Call remote skills without exposing code. E2E encrypted, revo19Python2026-03-21
attach-gatewaysource codeDrop-in OIDC & Google A2A auth + Weaviate memory for Ollama, vLLM and any local LLM server.18Python2025-04-29
Agentic_AI_Engineersource codeMy complete journey to becoming an Agentic AI Engineer through structured learning, projects, experiments, and18Jupyter Notebook2026-07-26
A2ARegistrysource codeA2A Registry 18Python2025-09-16
mq9source codeAgent registration, discovery, and reliable async messaging — in one broker.18Python2026-04-04
agent-messagesource codeCross-tool messaging between AI coding agents — Claude Code, Codex CLI, Cursor, Copilot, Aider. File-based: no18Shell2026-04-24
spellguardsource codeSecure, auditable agent-to-agent communication framework18TypeScript2026-05-13
secure-rag-multi-agentsource codeSecure Retrieval-Augmented Generation (RAG) with role-based access control using Mastra AI orchestration, with18TypeScript2025-09-17
Langgraph-SelfPaced-Coursesource codeLanggraph-SelfPaced-Course Step by Step17Python2025-11-19
refraxsource codeCommand-Line Agentic Refactoring of Java Code17Go2025-06-11
strands-a2a-demosource codeDemo with multiple AI agents using A2A (agent-to-agent) with the Strands Agents SDK.17Python2025-07-08
swarmsource codeSDK to build Agents in rust. Build and manage complex, self-correcting agent teams. Launch multi-agent systems17Rust2025-06-28
Cognispheresource codeCognisphere ADK is an AI agent development framework built on Google's Agent Development Kit (ADK) 17Python2025-04-15
orchestrasource codeSteerable Harnesses for DeepAgents — Orchestra🪶17Python2024-11-17
agent-bussource codeLocal message bus for Claude Code, Codex, and other MCP agents — one SQLite file, 20 tools, no daemon, no clou17TypeScript2026-05-13
Mastery-AI-Apps-Devsource codeMastery AI Apps Dev Workshop: Jumpstart your journey into AI-powered app development! This hands-on workshop g17Python2025-06-18
muxisource codeAn extensible AI agents framework17not reported2025-02-28
eCan.aisource codePrivacy-first, AI native agents For E-Commerce (and beyond), create skill (langgraph based workflow), tasks, a17Python2022-11-29
agentic-healthcare-aisource codeHealthcare AI Agents - Demo solution16Python2025-06-28
Multi-Agent-Research-Assistant-Langgraphsource codeAutonomous multi-agent system built using LangChain and LangGraph that orchestrates collaborative agents—Super16Python2025-10-26
klodi-pluginsource codeThe agent-to-agent marketplace, in your agent host. Your agent lists, haggles, and closes deals for you while 16Python2026-04-21
aiops-orchestratorsource codeA production-ready, multi-channel AI agent for AIOps, Kubernetes management, and automated remediation — built16Python2026-02-02
the-academysource codeA Socratic dialogue engine for AI agents. 16TypeScript2025-06-04
kernelsource codeThree packages: @kernel.chat/agent-os (POSIX for AI agents — capabilities, namespaces, quotas, taint, audit, v16TypeScript2025-11-22
agorasource codeZero trust network for governed agent-to-agent communication - discovery, engagement contracts, session govern16Go2026-04-06
adksource codeKagenti Agent Development Kit16Python2026-03-13
btp-joule-a2a-pro-code-agentsource codeModular reference implementation covering a full-fledged agentic scenario end to end including Joule Integrati16TypeScript2026-04-10
volysource codeControl plane for AI coding agents: route tasks, reduce token spend, run multi-agent workflows, fallback execu16Python2026-07-03
agents-txtsource codeagents.txt is a lightweight, machine-readable capability declaration layer for websites in the agentic web: a 15Astro2026-05-13
telegram-ai-bridgesource codeHeterogeneous AI agents (Claude Code + Codex + Agy + Kimi) collaborating in Telegram groups over A2A-TG — a ge15JavaScript2026-03-03
rust-adksource codeAn Agent Development Kit (ADK) allowing for seamless creation of A2A-compatible agents written in Rust.15Rust2025-07-29
vector-mcpsource codeVector MCP Server for AI Agents - Supports ChromaDB, Couchbase, MongoDB, Qdrant, and PGVector15Python2025-08-30
omniwiresource codeInfrastructure for AI agent swarms - 88 MCP tools, A2A, mesh VPN, CDP browser, 2FA15TypeScript2026-03-21
btp-agentic-ai-use-casessource codeSample Custom Industry AI Agents built with Joule Studio(LCNC), Joule Studio Code Editor(Low-Code), SAP Cloud 15Python2026-02-18
supervaizersource codeSUPERVAIZER is a toolkit built for the age of AI interoperability. At its core, it implements Google's Agent-t15Python2025-04-21
parler-protocolsource codea secure chat protocol for AI agents15Rust2026-06-25
awesome-agent-payments-protocolsource code🚀 Curated resources for Google's Agent Payments Protocol (AP2), A2A & x402 — blogs, videos, repos & specs. Con15HTML2025-09-22
murmursource codeMurmur — encrypted agent-to-agent messaging bus for AI coding agents. MCP-native, E2E encrypted (XChaCha20-Pol14JavaScript2026-02-11
Agents.KTsource codeTyped Kotlin DSL framework for AI agent systems.14Kotlin2026-03-06
da2asource codeFirst-class protocol and framework for enabling collaborative intelligence and communication across specialize14Python2025-09-15
adl-clisource codeA command-line tool to scaffold and manage enterprise-ready AI Agents powered by the A2A (Agent-to-Agent) prot14Go2025-07-20
A2A-langgraphsource codeThis project demonstrates Agent-to-Agent (A2A) conversations using LangGraph with the A2A protocol. It include14Jupyter Notebook2025-11-13
codex-a2asource codeExpose Codex through A2A with an inbound server surface and embedded outbound client.14Python2026-02-15
genai-eshop-semantic-kernelsource codePractical GenAI-Eshop application using Semantic Kernel, multi-agent orchestrations, Mcp tools, A2A Agents, Se14C#2025-10-05
peacsource codePortable signed records for automated interactions.14TypeScript2025-07-14
agentic-kernelsource codeA flexible foundation AI system for creating A2A-compatible autonomous AI agents that can collaborate, reason,14Python2025-04-02
a2a-gosource codeGo implementation of the Agent-to-Agent (A2A/a2a) protocol 14Go2025-07-01