The Open Reference for
AI Agent Protocols

AutoGen

Multi-agent conversation framework enabling groups of LLM agents to solve tasks through automated chat with customizable interaction patterns.

CrewAI

Role-based multi-agent orchestration framework where specialized agents collaborate on complex tasks with defined roles and goals.

LangGraph

Framework for building stateful multi-actor agent applications as computational graphs with cycles and branching.

CopilotKit/CopilotKit

The Frontend Stack for Agents & Generative UI. React + Angular. Makers of the AG-UI Protocol

Agent-to-Agent Protocol (A2A)

Google-led open protocol for agent-to-agent communication enabling discovery, negotiation, and task delegation between heterogeneous agent systems.

Agent-to-Agent Protocol (A2A)

An open protocol enabling communication and interoperability between opaque agentic applications built on diverse frameworks. A2A provides a common language for...

MemGPT / Letta

Virtual context management system that gives LLMs the ability to manage their own memory hierarchy, enabling unlimited context through paging.

Swarm (OpenAI)

Lightweight multi-agent orchestration with handoffs and routines, emphasizing simplicity and agent-to-agent transfers.

AG-UI

An open, lightweight, event-based protocol that standardizes how AI agents connect to user-facing applications. AG-UI provides the bi-directional runtime connec...

Guardrails AI

Framework for adding structural, type, and quality guarantees to LLM outputs with validators and corrective actions.

HTTP 402 Payment Protocol (x402)

An open standard for internet-native payments built on the HTTP 402 status code. x402 enables AI agents and applications to pay for API access, content, and ser...

getsentry/XcodeBuildMCP

A Model Context Protocol (MCP) server and CLI that provides tools for agent use when working on iOS and macOS projects.

mobile-next/mobile-mcp

Model Context Protocol Server for Mobile Automation and Scraping (iOS, Android, Emulators, Simulators and Real Devices)

PennyroyalTea/gibberlink

Two conversational AI agents switching from English to sound-level protocol after confirming they are both AI agents

Zep

Long-term memory service for AI assistants with automatic summarization, entity extraction, and temporal awareness.

openclaw/acpx

Headless CLI client for stateful Agent Client Protocol (ACP) sessions

Mouseww/anything-analyzer

全能协议分析工具：浏览器抓包 + MITM 代理 + 指纹伪装 + AI 分析 + MCP Server 无缝对接 AI Agent/IDE | All-in-one protocol analysis toolkit — built-in browser capture, MITM proxy, JS hook...

open-gitagent/gitagent-protocol

A framework-agnostic, git-native standard for defining AI agents

RAIT-09/obsidian-agent-client

Bring AI agents into Obsidian via Agent Client Protocol (ACP), such as Claude Code, Codex and Gemini CLI.

sendaifun/solana-agent-kit

connect any ai agents to solana protocols

machinepulse-ai/world2agent

World2Agent(W2A) is an open protocol that standardizes how Al agents perceive the real world.

Agent Network Protocol (ANP)

An open-source communication protocol that aims to become the HTTP of the Agentic Web era. ANP defines how intelligent agents connect through a three-layer arch...

A2A

Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications.

A2V

A2V: Next-Gen AI Value Compute Protocol.

Agent Communication Language (FIPA ACL)

IEEE FIPA standard for inter-agent communication with performatives like inform, request, propose, and structured message envelopes.

Agent Payment Protocol v2 (AP2)

A payment protocol designed for agent-to-agent commerce, enabling autonomous agents to negotiate, transact, and settle payments with each other. AP2 is part of ...

Agent Protocol

Universal open standard for interacting with AI agents, providing a common interface for agent communication regardless of underlying framework.

Agent-to-UI Protocol (A2UI)

A declarative, LLM-friendly generative UI specification that enables agents to respond with dynamic UI components rather than just text. A2UI is a JSONL-based, ...

Assemblies-of-putative-SARS-CoV2-spike-encoding-mRNA-sequences-for-vaccines-BNT-162b2-and-mRNA-1273

RNA vaccines have become a key tool in moving forward through the challenges raised both in the current pandemic and in numerous other public health and medical...

Constitutional AI

Self-supervised alignment method where AI systems evaluate and revise outputs against a set of principles (a constitution).

CopilotKit

The Frontend Stack for Agents & Generative UI. React + Angular. Makers of the AG-UI Protocol

Figma-Context-MCP

MCP server to provide Figma layout information to AI coding agents like Cursor

LangChain Memory

Pluggable memory subsystem supporting buffer, summary, entity, and knowledge-graph memory backends for conversation persistence.

MCP UI Extension

A fully open, iframe-based generative UI standard that extends the Model Context Protocol for user-facing experiences. MCP-UI allows MCP servers to deliver inte...

Model Context Protocol

An open-source standard for connecting AI applications to external systems like data sources, tools, and workflows. Think of it as a USB-C port for AI — providi...

OWASP LLM Top 10

Security framework identifying top vulnerabilities in LLM applications including prompt injection, data leakage, and insecure output handling.

Open JSON UI Specification

An open standardization of OpenAI's internal declarative generative UI schema. Open-JSON-UI enables agents to respond with structured, typed UI components in a ...

OpenAI Assistants API

Thread-based agent harness with tool execution, file handling, and persistent conversation management.

OpenAI Function Calling

Schema-based tool invocation where models output structured JSON matching declared function signatures.

Scrapling

🕷️ An adaptive Web Scraping framework that handles everything from a single request to a full-scale crawl!

Tool Use (Anthropic)

Native tool use capability allowing Claude to call external tools with structured inputs and process results.

TrendRadar

⭐AI-driven public opinion & trend monitor with multi-platform aggregation, RSS, and smart alerts.🎯 告别信息过载，你的 AI 舆情监控助手与热点筛选工具！聚合多平台热点 + RSS 订阅，支持关键词精准筛选。AI 智能...

UI-TARS-desktop

The Open-Source Multimodal AI Agent Stack: Connecting Cutting-Edge AI Models and Agent Infra

WeiClaw

一条命令，把微信变成任何 AI Agent 的入口 | Connect WeChat to any AI Agent with one command

XcodeBuildMCP

A Model Context Protocol (MCP) server and CLI that provides tools for agent use when working on iOS and macOS projects.

a2a-net

.NET implementation of the Agent2Agent (A2A) protocol to enable secure, interoperable communication between autonomous agents across frameworks and vendors.

a2a-python

Official Python SDK for the Agent2Agent (A2A) Protocol

a2a-samples

Samples using the Agent2Agent (A2A) Protocol

a2ui-react

🤖 A2UI Protocol React Implementation | AI 驱动的动态 UI 协议 Enable AI agents to generate rich, interactive user interfaces through structured JSON. Transform LLM ou...

aamp

Mailbox-native protocol and SDKs for asynchronous agent collaboration over email

acpx

Headless CLI client for stateful Agent Client Protocol (ACP) sessions

activepieces

AI Agents & MCPs & AI Workflow Automation • (~400 MCP servers for AI agents) • AI Automation / AI Agent with MCPs • AI Workflows & AI Agents • MCPs for AI Agent...

ag-ui

AG-UI: the Agent-User Interaction Protocol. Bring Agents into Frontend Applications.

agent-client-protocol

A protocol for connecting any editor to any agent

agent-runtimes

🤖 🚀 Agent Runtimes - Expose AI Agents through multiple protocols.

agent-sdk-go

Durable AI agents in Go — built on Temporal. Agent runs survive crashes, restarts & deploys automatically. OpenAI, Anthropic, Gemini, tools, MCP, A2A, RAG, conv...

aser

Aser is a lightweight, self-assembling AI Agent frame.

awaken

AI agent runtime for Rust — type-safe state, multi-protocol serving, plugin extensibility.

awesome-a2a

Agent2Agent (A2A) – awesome A2A agents, tools, servers & clients, all in one place.

awesome-agent-evolution

A curated list of AI Agent evolution, memory systems, multi-agent architectures, and self-improvement projects. | evomap.ai

awesome-agents

A curated list of AI agent platforms, frameworks, protocols, tools, and resources

awesome-mcp-servers

A collection of MCP servers.

bitterbot-desktop

A local-first AI agent with persistent memory, emotional intelligence, and a peer-to-peer skills economy.

casdoor

An open-source Agent-first Identity and Access Management (IAM) /LLM MCP & agent gateway and auth server with web UI supporting OpenClaw, MCP, OAuth, OIDC, SAML...

china-dictatorship

反中共政治宣传库。Anti Chinese government propaganda. 住在中国真名用户的网友请别给星星，不然你要被警察请喝茶。常见问答集，新闻集和饭店和音乐建议。卐习万岁卐。冠状病毒审查郝海东新疆改造中心六四事件法轮功 996.ICU709大抓捕巴拿马文件邓家贵低端人口西藏骚乱。Friends wh...

chrome-devtools-mcp

Chrome DevTools for coding agents

commonly

A social platform for humans and AI agents, built and maintained by its own AI team. Connect any agent via HTTP.

context7

Context7 Platform -- Up-to-date code documentation for LLMs and AI code editors

dcp-ai

Accountability protocol for autonomous AI agents on open networks

evo-ai

Evo AI is an open-source platform for creating and managing AI agents, enabling integration with different AI models and services.

evolver

The GEP-powered self-evolving engine for AI agents. Auditable evolution with Genes, Capsules, and Events. | evomap.ai

fastmcp

🚀 The fast, Pythonic way to build MCP servers and clients.

gemini-cli

An open-source AI agent that brings the power of Gemini directly into your terminal.

generative-ui

Generative UI examples for: AG-UI, A2UI/Open-JSON-UI, and MCP Apps.

generative-ui-playground

Interact with all three types of generative UI, all in one interface

ghost

The Private Agent OS — search files, run AI agents, connect to 10,000+ tools via the complete protocol stack (MCP, AG-UI, A2UI, A2A). Zero cloud. Zero telemetry...

gibberlink

Two conversational AI agents switching from English to sound-level protocol after confirming they are both AI agents

gitagent-protocol

A framework-agnostic, git-native standard for defining AI agents

github-mcp-server

GitHub's official MCP Server

gpt-researcher

An autonomous agent that conducts deep research on any data using any LLM providers

mcp-agent

Build effective agents using Model Context Protocol and simple workflow patterns

mcp-apps-demo

Interactivity at a new level - MCP apps

mcp-chrome

Chrome MCP Server is a Chrome extension-based Model Context Protocol (MCP) server that exposes your Chrome browser functionality to AI assistants like Claude, e...

mcp-toolbox

MCP Toolbox for Databases is an open source MCP server for databases.

medplum-ai-concierge

Healthcare dashboard with AI-powered chart generation

n8n

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.

opencrew

Openclaw多智能体协同系统 | Multi-Agent OS for Decision Makers — 基于 OpenClaw (Clawbot) + Slack，让 AI 团队各司其职、自主稳定迭代。

pal-mcp-server

The power of Claude Code / GeminiCLI / CodexCLI + [Gemini / OpenAI / OpenRouter / Azure / Grok / Ollama / Custom Model / All Of The Above] working as one.

pilotprotocol

Pilot Protocol: The Internet of Agents

playwright-mcp

Playwright MCP server

ruflo

🌊 The leading agent orchestration platform for Claude. Deploy intelligent multi-agent swarms, coordinate autonomous workflows, and build conversational AI syst...

scene-creator-copilot

servicenow-api

ServiceNow MCP Server and API Wrapper

synadia-agents

SDKs and reference implementations for the Synadia Agent Protocol for NATS

yomo

🦖 Serverless AI Agent Framework with Geo-distributed Edge AI Infra.