Tools for MCP

MIT source for the reverse-engineer-anything skill - evidence-led native, managed, JavaScript/Electron, packaged, and browser investigations with explicit provider limits

Open-source AI agent framework that turns LLMs into persistent, proactive personal AI agents with multi-channel messaging (Signal, Telegram, Discord, WhatsApp), cron scheduling, memory systems, MCP integration, skill plugins, sub-agent spawning, and browser automation

by Jesse Vincent - A strong bundle of core competencies for software engineering, with good coverage of a large portion of the SDLC - from planning, reviewing, testing, debugging... Well written, well organized, and adaptable. The author refers to them as "superpowers", but many of them are just consolidating engineering best practices - which sometimes does feel like a superpower when working wit

by Affaan Mustafa - Top-notch, well-written resources covering "just about everything" from core engineering domains. What's nice about this "everything-" store is most of the resources have significant standalone value and unlike some all-encompassing frameworks, although you can opt in to the author's own specific workflow patterns if you choose, the individual resources offer exemplary patterns

Open-source terminal-native AI coding agent with 131K+ stars and 2.5M+ monthly active developers. Provider-agnostic architecture supports 75+ LLM providers plus native LSP auto-configuration, multi-session parallel agents, and MCP extensibility. The build/plan agent split and client/server architecture make it the most complete open-source reference for a terminal-first coding harness

Web search, scrape and crawl API for AI agents. Turns any website, including JavaScript-heavy pages, into clean LLM-ready markdown or structured JSON, with browser actions (click, scroll, type), PDF and DOCX parsing, an MCP server and an autonomous agent endpoint. Open source (AGPL-3.0) and self-hostable

by Anthropic - Anthropic's official repository for Agent Skills — the SKILL.md format, a skill template, and example skills, the same format Claude Code loads natively

Skill that makes coding agents behave like a "lazy senior dev": prefer built-in solutions, avoid new dependencies, and write the minimum code that works. Benchmarked on real Claude Code sessions with ~54% fewer lines, ~20% lower cost, and preserved safety guards — a rare harness-level incentive that fights over-engineering rather than just adding capability

(132.1k ⭐) - Cross-platform desktop assistant for Claude Code, Codex, OpenCode, OpenClaw, Grok Build, and Hermes Agent

Collection of production LLM applications with source code across RAG, multi-agent, and tool-use patterns. Good reference for how harness primitives combine in real applications

Open-source browser agent (Python and TypeScript) whose loop injects serialized DOM state each step, exposes browser actions as registered tools, and runs the same code against a local Chrome or a cloud browser. It has grown from a minimal reference into a full framework (~70k lines of Python across agent, DOM, tools, MCP, and sandbox modules) — study it for production DOM-to-context serialization

Production-grade engineering skills for AI coding agents, packaged as 24 reusable skills covering the full development lifecycle from /spec to /ship. The slash-command interface and context-aware auto-activation make it a concrete reference for turning senior-engineering judgment into agent-executable harness artifacts

Self-hosted platform where agents wake on heartbeats to claim tickets, governed by org charts, budgets, and approval gates.

The official open-source AI agent that brings the power of Gemini directly into your terminal. Features context-aware coding assistance, file manipulation, and command execution capabilities

Multi-platform search CLI for 17 sites including Chinese platforms

Curated list of 10,000+ community MCP servers. ~30K+ ⭐

High-performance editor in Rust with native AI features, Zeta edit prediction, and Agent Client Protocol support. ~77K+ ⭐

Anthropic's official reference MCP server implementations (GitHub, Slack, Postgres, Puppeteer, etc.). The authoritative source for understanding correct MCP server structure before building your own

Open-source web crawler and scraper for LLMs and AI agents: any website into clean, LLM-ready Markdown. Run it yourself, or use Crawl4AI Cloud with one key. Join our Discord https://discord.gg/VuxzM8mtf

Intelligent routing across multiple LLM providers with load balancing, intelligent fallbacks, rate limiting, and response caching. Achieves 40–60% token cost reduction through smart model routing (cheap models for simple tasks, capable models for complex reasoning). Essential infrastructure for harnesses operating under strict cost budgets where model selection is a per-turn decision

Agent orchestration platform -- deploy multi-agent swarms, coordinate autonomous workflows, distributed swarm intelligence, RAG integration

Compresses tool outputs, logs, files, and RAG chunks before they enter the context window, cutting active tokens by 60–95% without changing answers. Ships as a library, proxy, and MCP server — the right drop-in layer for any harness where bulky tool returns are the primary context pressure source

Write videos as HTML and render them to MP4: launch films, explainers, captions, charts and 450+ ready-made blocks, by HeyGen

The all-in-one Desktop & Docker AI application with built-in RAG, AI agents, No-code agent builder, MCP compatibility, and more

MCP server and CLI that injects up-to-date, version-specific library documentation directly into agent context, eliminating hallucinated APIs and outdated code examples caused by stale training data. Ships as both a ctx7 command-line tool and an MCP server with resolve-library-id and query-docs tools

⭐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 智能筛选新闻 + AI 翻译 + AI 分析简报直推手机，也支持接入 MCP 架构，赋能 AI 自然语言对话分析、情感洞察与趋势预测等。支持 Docker ，数据本地/云端自持。集成微信/飞书/钉钉/Telegram/邮件/ntfy/bark/slack 等渠道智能推送。

Local-first AI memory system that stores conversation history verbatim and retrieves it with semantic search through a structured palace architecture (wings, rooms, drawers). Achieves 96.6% R@5 on LongMemEval with zero LLM calls, making it the best-benchmarked open-source memory layer for agents that need cross-session persistence without cloud dependencies

PrivateGPT is a secure, offline-capable AI tool for querying documents with Large Language Models, offering high-level and low-level APIs for privacy-conscious, context-aware application development github

Agent memory system organized around three explicit operations—retain, recall, and reflect—with semantic, keyword, graph, and temporal retrieval plus an MCP server. The June 2026 release and production usage make it a concrete reference for turning cross-session persistence from passive storage into an active learning layer inside the harness

Block's open-source, extensible AI agent donated to the Linux Foundation's Agentic AI Foundation in April 2026. Its MCP-native architecture treats every capability as an MCP server, making it a practical reference for building vendor-neutral, extensible harnesses where tool integration is the primary extension mechanism rather than framework-specific plugins

Official Google MCP server that exposes live Chrome debugging surfaces — network analysis, performance profiling, console messages, memory snapshots, and Lighthouse audits — as structured agent tools. The clearest reference for turning browser inspection into a first-class tool interface rather than relying solely on screenshot-driven automation

HKUDS's ultra-lightweight, self-hosted personal AI agent framework: a single readable Python core that combines WebUI/terminal/chat-app surfaces, long-term memory, MCP tools, model routing, multi-agent delegation, and scheduled automation. A practical reference for how a complete personal agent harness can own the full stack without becoming a black-box platform

Installable library of 1,400+ agentic skills for Claude Code, Cursor, Codex CLI, Gemini CLI, and more. The largest community-driven skill catalog with an npm installer and role-based bundles — a concrete reference for treating skills as versioned harness artifacts rather than ad-hoc prompts

High-performance code intelligence MCP server that full-indexes repositories into a persistent knowledge graph via tree-sitter AST analysis across 66 languages. Replaces dozens of file-read/grep cycles with sub-millisecond structured queries, cutting active tokens by 120× and turning codebase navigation from a context-pressure problem into a pointer-chasing problem

Self-hosted multi-model chat. All major providers

by luongnv89 - A structured, chapter-based getting-started guide for Claude Code with a self-assessment quiz and a ten-module progressive learning path — slash commands, memory, skills, subagents, MCP, hooks, plugins, and checkpoints — with visual diagrams and copy-paste templates

by Anthropic - Anthropic's official, curated directory of high-quality Claude Code plugins, installable from within Claude Code

Open-source personal agent harness: desktop app and Rust library with built-in memory, token compression, and instant tool search, efficient enough to run hundreds of agents on a $10 server.

Cross-harness plugin marketplace that maintains one source-of-truth plugins/ directory and generates harness-native artifacts for Claude Code, Codex CLI, Cursor, OpenCode, Gemini CLI, and GitHub Copilot. It is the clearest practical example of treating reusable agent capabilities as a portable distribution format rather than ad-hoc prompt files

Open-source, community-driven terminal coding agent harness written in Rust with a model-agnostic runtime, OS-level sandbox (Seatbelt/Landlock/seccomp/bwrap), resumable fleets via an append-only ledger, and a /model command that lets you switch providers mid-task. A strong example of treating the harness — not the model — as the product surface, with clear separation between interactive TUI, headl

17 directives blocking the most common LLM coding honesty failures: hallucinated APIs, invented signatures, false-confidence validation, manufactured-urgency capitulation, authority-driven softening, and self-referential comments. Drop the .mdc in .cursor/rules/

Arm Cloud Migration Assistant accelerates moving x86 workloads to Arm infrastructure. It scans the repository for architecture assumptions, portability issues, container base image and dependency incompatibilities, and recommends Arm-optimized changes. It can drive multi-arch container builds, validate performance, and guide optimization, enabling smooth cross-platform deployment directly inside G

PostHog provides open-source web & product analytics, session recording, feature flagging and A/B testing that you can self-host. Get started - free

Headless browser for AI and web automation with a built-in MCP server

Connect and unify data across various platforms and databases with MindsDB as a single MCP server

(by UI-TARS) - A fast, lightweight MCP server that empowers LLMs with browser automation via Puppeteer’s structured accessibility data, featuring optional vision mode for complex visual understanding and flexible, cross-platform configuration

Browser automation via accessibility tree snapshots rather than screenshots, dramatically reducing token cost. The canonical example of structured tool output design in an MCP server

Draw and edit draw.io diagrams from your project's files on a live browser canvas you can also edit by hand, with version history, undo, AWS, Azure and GCP shape libraries and PNG or SVG export

Continue is an open-source autopilot plugin for VS Code and JetBrains, enhancing coding with LLMs through features like task and tab autocomplete, natural language edits, file generation, and customization options, available under the Apache 2.0 license github | website

753 cybersecurity skills across 38 domains: cloud security, pentesting, red teaming, DFIR, malware analysis, threat intel, and more (MITRE ATT&CK mapped)

Start building LLM-empowered multi-agent applications in an easier way. github

Official GitHub server for integration with repository management, PRs, issues, and more

Open-source desktop client that runs multiple agent CLIs (Claude Code, Codex, Gemini CLI, Qwen Code) side by side, with multi-session chat, MCP and ACP support, and local file management

MCP server that intercepts raw tool output before it enters the context window, sandboxing bulky data (Playwright snapshots, GitHub issues, logs) outside the LLM and retrieving only relevant fragments via BM25 when needed. The "think in code" paradigm — replacing ten file-read tool calls with one script execution — is a concrete harness pattern for turning context pressure into a programming probl

CLI tool for configuring and monitoring Claude Code projects and workflows

Connect AI assistants to Blender

Open-source memory platform with a hybrid graph-vector-relational poly-store that lets agents recall facts through both semantic similarity and structured graph traversal — the practical middle ground between flat vector stores and full multi-graph research systems. The self-improving pipeline reweights edges from agent feedback, and the 14-tool MCP server makes it a drop-in memory primitive for p

Local-first code intelligence graph for MCP and CLI. Builds a persistent map of your codebase so AI coding tools read only what matters, with benchmarked context reductions on reviews and large-repo workflows.

AI-powered web scraping library that creates scraping pipelines using natural language.- ScrapeGraphAI

Gives Gemini CLI a real Firefox to drive from plain-English instructions: opens pages, clicks, types, reads and screenshots through the real pointer and keyboard. Open source, MIT. Install via gemini extensions install https://github.com/feder-cr/AIHawk

Open-source infrastructure for Computer-Use Agents: sandboxed full-desktop control across macOS, Linux, and Windows, a background-native macOS driver that operates without stealing cursor focus, plus SDKs and benchmarks. The most complete reference for building harnesses around screen-based agent loops that need real OS interaction rather than browser-only surfaces

A fully-featured coding agent that relies on symbolic code operations by using language servers

Wraps 250+ SaaS APIs (GitHub, Slack, Linear, Notion, etc.) as agent-ready actions with managed OAuth, so tool integration becomes a one-line import rather than a custom harness component per service. The fastest path from "the agent needs to call an external API" to a production-grade, authenticated tool

GPT Researcher is an AI-powered autonomous agent designed for efficient and unbiased online research, generating detailed reports by leveraging recent advancements in AI and web scraping, with a focus on speed, reliability, and cost-effectiveness github | github profile

JavaScript in-page GUI agent. Control web interfaces with natural language.

TypeScript-native agent framework (from the Gatsby team) with 22K+ stars and 300K+ weekly npm downloads. Connects to 40+ providers through one standard interface, with built-in workflows, RAG pipelines, and agent orchestration. The @mastra/deployer handles serverless deployment, and the eval system supports LLM-as-judge out of the box. The strongest alternative to Vercel AI SDK for teams that need

25 MB lightweight cross-platform database client for 100+ databases, including MySQL, PostgreSQL, SQLite, Redis, MongoDB, DuckDB, SQL Server, and Dameng. Built-in AI, MCP Server, CLI, desktop and Docker. | 轻量级跨平台数据库管理工具，支持 MySQL、PostgreSQL、SQLite、Redis、MongoDB、达梦等 100+ 数据库，提供桌面端、Docker、CLI、内置 AI 助手和 MCP。

Official skills catalog: .system, .curated, and .experimental skills. The authoritative upstream source

Task management for AI-driven development: PRD parsing, task expansion, multi-provider support and selective tool loading to save context

The fast, Pythonic way to build Model Context Protocol servers 🚀

NEW (Apr 2026) Agentic focus. 1M ctx. Repo-level coding. MCP-native

The leading TypeScript toolkit for building AI agents (20M+ monthly downloads, 25+ provider integrations). AI SDK 6 introduced a first-class Agent abstraction with ToolLoopAgent for production-ready tool execution loops, DevTools for local debugging, full MCP support, and type-safe UI streaming. The unified API across OpenAI, Anthropic, Google, and AWS Bedrock makes it the default choice for TypeS

SpaceXAI's open-source terminal coding agent harness: a Rust-based fullscreen TUI with an extensible tool runtime, MCP/skills/hooks support, and headless/embedded modes via ACP. A useful first-party counterpoint to Claude Code and Codex CLI for studying how a new model provider structures the loop, checkpoints workspace state, and exposes the same harness through interactive and scripted surfaces

Google's open Agent-to-Agent protocol: JSON-RPC over HTTP(S)/SSE with Agent Card service discovery and a task/message/artifact communication model. The emerging standard for cross-framework agent interoperability in multi-agent harnesses

Healthcare administration specialist with 51 sub-agents covering revenue cycle, compliance, quality, clinical ops, health IT, and payer relations

OSS Zapier alternative with AI

Open-source 3D architectural editor with a local CLI, MCP tools, and practical workflows for humans and AI agents.

The official Python SDK for Model Context Protocol servers and clients

Official OpenWork plugin to deploy AI models, skills, and MCPs to your team's OpenCode

by NVIDIA - Security scanner for AI agent skills. Detect vulnerabilities, malicious patterns, and security risks

Harness builder for deterministic AI coding workflows, combining agent steps with scripts, validation gates, approvals, and isolated git worktrees. Claude Code, Codex, and more.

Official Skyvern browser automation skill — AI-powered browser control using Vision LLMs and computer vision for navigating sites, filling forms, and extracting structured data

MCP for Claude Code to build and manage n8n automation workflows

Comet's open-source AI observability and evaluation platform: deep tracing of LLM calls, conversation logging, and agent activity, plus built-in eval metrics, prompt versioning, guardrails, and the Opik Agent Optimizer. Worth including because it unifies observability, verification, and optimization in one self-hostable stack rather than stitching together separate tools

🔥 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。

(22.1k ⭐) - A powerful GUI app and Toolkit for Claude Code - Create custom agents, manage interactive Claude Code sessions, run secure background agents, and more

Local screen and audio capture with timestamped indexing, SQL and embedding storage, semantic search, history analysis and event-triggered actions

程序员鱼皮的 AI 资源大全 + Vibe Coding 零基础教程，分享 OpenClaw 保姆级教程、大模型玩法（DeepSeek / GPT / Gemini / Claude / GLM）、最新 AI 资讯、Prompt 提示词大全、AI 知识百科（Agent Skills / RAG / MCP / A2A）、AI 编程教程（Harness Engineering）、AI 工具用法（Cursor / Claude Code / TRAE / Codex / Copilot）、AI 开发框架教程（Spring AI / LangChain）、AI 产品变现指南，帮你快速掌握 AI 技术，走在时代前沿。本项目为开源文档 aiguide，已升级为鱼皮 AI 导航网站

High performance coding agent harness written in Rust, built for heavy multi-agent dev workflows

June 2026 harness-first redesign built around the Capability primitive: a single composable unit bundling instructions, tools, lifecycle hooks, and model settings. The split between a small stable core and a fast-moving pydantic-ai-harness lets capabilities graduate as they prove essential, while deferred loading keeps unused tools out of the context window

Speech recognition toolkit with pretrained models and tools for voice activity detection, punctuation restoration, and speaker diarization

短剧、漫剧制作工具 Toonflow：开源 AI 视频创作平台，集成剧本创作、智能分镜、角色与场景资产管理、图像生成和视频生成。融合无限画布、AI Agent 与可视化工作流，支持本地部署、自选模型、跨平台客户端、MCP 与插件扩展。Open-source AI short drama and motion comic creation tool with an infinite canvas, AI agents, storyboarding, image and video generation. Self-hosted and extensible, with a canvas-based approach similar to LibTV and TapNow.

Expose pipelines from RocketRide, a self-hosted, open-source AI pipeline tool with multi-LLM support, as tools

Self-healing browser harness that connects an LLM directly to your real Chrome via CDP. The critical design decision: the agent itself writes missing helpers and domain skills into the harness during execution, so the scaffold improves every run rather than requiring manual updates. At ~1k lines across four core files, it is the clearest published demonstration of an editable harness that learns f

Microsoft's skill optimizer that trains reusable natural-language skills for frozen LLM agents through trajectory-driven edits and validation-gated updates, producing deployable best_skill.md artifacts. The key harness insight is that skills should be treated as optimizable parameters that improve with execution feedback, not static prompt fragments written once and forgotten

AI search engine and MCP server for bots and agents. One Rust binary indexes code, docs, logs, JSONL/CSV and PDFs for BM25 full-text, vector and hybrid search, code search without grep, agent memory and RAG. Elasticsearch-compatible API; Corpus Hub serves hundreds of reference memory corpora.

Markdown-first research workflows for Claude Code and other agents, centered on autonomous literature review, experiments, paper iteration, and cross-model critique

Rust - Open-source Agent OS built in Rust. 137K LOC. 14 crates. 1,767+ tests. Zero clippy warnings

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.

Agent framework and applications built upon Qwen>=3.0, featuring Function Calling, MCP, Code Interpreter, RAG, Chrome extension, etc