A2A directory

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

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A2A directory

ProjectStarsLanguageCreated
AgentCardViewersource codeAgent2Agent プロトコル（A2A）のエージェントカードを表示するアプリケーション0HTML2026-05-06
a2a-mcp-demosource codeA Demo for A2A-MCP Multi-Agent System0Python2026-05-07
agent-to-agent-communication-file-mailboxsource codeFile-based cross-agent / multi-agent message passing for CLI agents — no server, just shared files.…0not reported2026-07-12
hedera-verify-mcpsource codeMCP server to verify and timestamp document hashes on Hedera mainnet0JavaScript2026-06-03
llm-mocksource codeProvide a mock LLM interface for C++ to simplify testing and development within the llm-cpp toolkit…0C++2026-03-18
Interentsource codePay-to-run AI toolchain marketplace: plan a workflow, see pricing + service fee, pay once via Locus Checkout,…0TypeScript2026-04-26
mas-external-memorysource codeExternal memory layer for multi-agent collaboration0not reported2026-04-11
employer-agentsource codeThe employer side of the Open Employment Protocol — a role-agent that exposes verified claims (real stack,…0not reported2026-06-02
open-employment-protocolsource codeOpen Employment Protocol — a reconciler, not a spec author. The candidate side and employer side each bring…0not reported2026-06-01
resume-agentsource codeFork-ready A2A + MCP professional agent — employer AI systems query your profile, OEP domain verification,…0TypeScript2026-03-22
Context-Handoff-Protocolsource codePortable, permissioned, verifiable context handoff for AI agents and workflow systems.0JavaScript2026-07-14
A2A-Health-Assistantsource codeHealth Assistant Using Multi-agents A2A and MCP protocol0Python2026-03-14
joinmultiplayer.aisource codeOpen thin client for joinmultiplayer.ai — the agent-to-agent network. The code that runs on your machine,…0Python2026-06-09
p402-protocolsource codeP402 Payment Protocol0TypeScript2026-02-28
AUhikari-802.1xsource code🌐 Analyze au Hikari's 802.1x authentication to gain a global IP address independently from the provided HGW…0not reported2026-01-16
agent-worldsource codeThe first beacon for Agent World: identity, boundaries, trust, and agent-to-agent handshakes.0not reported2026-05-21
agent-registrysource codePublic registry for all agents0Go2026-08-03
mcpchecksource codeProtocol conformance testing and runtime monitors for MCP and A2A agents. Checks message ordering, not just…0Python2026-08-05
deepbrief-labsource codeBuild Your Own Deep Research — a 9-notebook student lab covering MCP, A2A, multi-agent, and HITL agent…0Python2026-05-08