SDKs & frameworks

Testing and evaluation platform to chat, inspect, and debug MCP servers, MCP apps, and ChatGPT apps.

🔥 Java enterprise application development framework for full scenario: Restrained, Efficient, Open, Ecologicalll!!! 700% higher concurrency 50% memory savings Startup is 10 times faster. Packing 90% smaller; Compatible with java8 ~ java26; Supports LTS. (Replaceable spring)

🪄 Flint is a visualization language that lets AI agents reliably create expressive, good-looking charts from simple, human-editable chart specs.

Enterprise AI Platform with guardrails, MCP registry, gateway & orchestrator

The official Rust SDK for the Model Context Protocol

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

Context window optimization for AI coding agents. Sandboxes tool output (98% reduction), persists session memory, and enforces routing across 17 platforms via MCP + hooks.

🔥 MaxKB is an open-source platform for building enterprise-grade agents. 强大易用的开源企业级智能体平台。

Reference MCP servers from the Model Context Protocol steering group, showing how to give LLMs secure, controlled access to tools and data.

typescript-sdk is the official TypeScript SDK for building Model Context Protocol (MCP) servers and clients, letting LLM apps connect to tools and data.

MCP Inspector is an open-source developer tool for testing and debugging Model Context Protocol (MCP) servers through a web UI, CLI, or terminal TUI.

mcp-go is an MIT-licensed Go implementation of the Model Context Protocol for building MCP servers that connect LLM applications to external data sources and tools.

FastMCP is an open-source Python framework for building MCP servers, clients and interactive apps, so LLMs can connect to tools and data with minimal code.

Local-first, governed AI agent runtime for Python — embed it in your app, or run it as a CLI or ACP server. Permissions, MCP, memory and audit replay built in.

Supercharge AI Agents, Safely

Customer-run client for Secure MCP Tunnel: connect private or localhost MCP servers to ChatGPT, Codex, the Responses API, and AgentKit without exposing them to the public internet.

TDA - Thread Dump Analyzer (for Java). Analyze your Thread Dumps with a GUI or use it as MCP Server.

A unified Model Context Protocol server implementation that aggregates multiple MCP servers into one.

Multiplayer harness that shapes around your work. Agents, apps and workflows your team shares, used from Slack, Telegram, WhatsApp, Teams, Email, Web or your own AI agent.

lunar.dev: Agent native MCP Gateway for governance and security