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Supporting multi-protocol multi-user(Vmess, Vless, Trojan, ShadowSocks, Wireguard, Hysteria, Tunnel, Mixed, HTTP, Tun, MTProto، AmneziaWG)

Modern protocol-side framework based on NTQQ

All-in-one Mail & Collaboration server. Secure, scalable and fluent in every protocol (IMAP, JMAP, SMTP, CalDAV, CardDAV, WebDAV).

The Frontend Stack for Agents & Generative UI. React, Angular, Mobile, Slack, and more. Makers of the AG-UI Protocol

Model Context Protocol Reference Servers

KiCAD MCP is a Model Context Protocol (MCP) implementation that enables Large Language Models (LLMs) like Claude to directly interact with KiCAD for printed circuit board design.

The official Python SDK for Model Context Protocol servers and clients

Specification and documentation for the Model Context Protocol

HarnessRouter Community Edition: the self-hosted, Apache-2.0 edition of the unified interface for agent harnesses. Run Codex, Claude Code, Hermes, PI, DSH, and more through one API, with sessions, streaming, files, cancellation, and failure handling. Implements the Unified Harness Protocol (UHP), an open standard. Your keys, your infrastructure.

A new lightweight, hybrid routing mesh protocol for packet radios

This open-source curriculum introduces the fundamentals of Model Context Protocol (MCP) through real-world, cross-language examples in .NET, Java, TypeScript, JavaScript, Rust and Python. Designed for developers, it focuses on practical techniques for building modular, scalable, and secure AI workflows from session setup to service orchestration.

Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol.

FreeRDP is a free remote desktop protocol library and clients

A protocol for connecting any editor to any agent

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

A faster, simpler way to drive browsers supporting the Chrome DevTools Protocol.

Cross-platform, C implementation of the IETF QUIC protocol, exposed to C, C++, C# and Rust.

Registry of agents implementing the Agent Client Protocol (ACP)

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 hooks, fingerprint spoofing, AI analysis & MCP server for agent integration

mRemoteNG is the next generation of mRemote, open source, tabbed, multi-protocol, remote connections manager.

Apache ShenYu is a Java native API Gateway for service proxy, protocol conversion and API governance.

Protocol Buffers - Google's data interchange format

Cross-platform automation framework for all kinds of apps, built on top of the W3C WebDriver protocol

x64dbg-MCP Server is a native MCP (Model Context Protocol) plugin for x64dbg that exposes the debugger's full functionality over HTTP. Connect any MCP-compatible AI assistant and control x64dbg programmatically: set breakpoints, step through code, read memory, dump registers, and more. Built with Zig — zero dependencies, single-binary output, cros

The best way of working with Protocol Buffers.

🥧 Savoury implementation of the QUIC transport protocol and HTTP/3

SCIP Code Intelligence Protocol

Catalog of official Microsoft MCP (Model Context Protocol) server implementations for AI-powered data access and tool integration

The official Ruby SDK for the Model Context Protocol servers and clients.

Protocol and libraries for sending and receiving OpenTelemetry data using Apache Arrow