Tools & MCP
MCP servers, tool registries and function-calling plumbing
nexu-io/open-design nexu-io/open-design is the clear leader by adoption and breadth; before choosing, decide whether you need a broad, local-first desktop agent/design platform or a targeted MCP connector because most other projects exist to solve specific integration, governance, or efficiency needs.
Which one matches your setup?
Answer any of the questions — the shortlist updates as you go. Recommendations come from the capability passports below, nothing else.
Comparison matrix
Axes are extracted from each project's docs by our review pipeline; the maturity score is computed from stars, growth and commit activity — not an opinion. Click a column to sort.
| Runs in | Models | Context | Cost to run | |||||
|---|---|---|---|---|---|---|---|---|
⭐ 94.0k +1728/7d | CLICoding-agent pluginIDEWeb app | BYOKOpenAIAnthropicGeminiOllama / local | Project-wide access | No noise controls | ●●●●● | Self-hostable | ●●●●● | Your API key or Open Design Cloud (paid) |
⭐ 90.1k +149/7d | CLICoding-agent plugin | BYOK | Diff + related files | Configurable access controls | ●●●●● | Runs fully local | ●●●●● | Free to run locally |
⭐ 50.9k +1027/7d | CLIIDECoding-agent plugin | BYOK | Browser-only context | No noise controls | ●●●●● | Self-hostable (opt-outs) | ●●●●● | Free, runs locally |
⭐ 42.5k +6879/7d | CLIWeb appCoding-agent plugin | BYOKOpenAIAnthropicGemini | Skills-only context | Docs guidance | ●●●●● | Self-hostable | ●●●●● | Free to install; uses your API key(s) |
⭐ 24.2k +59/7d | CLIWeb appCI | BYOK | Diff only | None | ●●●●● | Fully local | ●●●●● | Free, open-source |
⭐ 15.3k +115/7d | CLI | GeminiFixed provider | Diff only | None mentioned | ●●●●● | Self-hostable | ●●●●● | Self-hosted; model/API costs may apply |
⭐ 14.3k +57/7d | Web app | Fixed provider | Diff only | None | ●●●●● | Self-hostable | ●●●●● | Free, self-host |
⭐ 12.8k +52/7d | CLIWeb appCoding-agent plugin | BYOK | Related files & metadata | No noise controls | ●●●●● | Self-hostable | ●●●●● | Self-host or use insforge.dev; requires your LLM API key. |
⭐ 5.5k +161/7d | CLIWeb app | BYOK | Action schemas & metadata | Policies & redaction | ●●●●● | Self-hostable | ●●●●● | Self-host on your infra or use OOMOL-hosted runtime |
⭐ 4.1k +99/7d | CLIWeb appCoding-agent pluginIDE | BYOK | Spec + data files | Validation + guidance | ●●●●● | Self-hostable | ●●●●● | Free, open-source |
⭐ 15.8k +44/7d | CLIIDE | BYOK | Single frame | Basic filtering | ●●●●● | Uses Figma API | ●●●●● | Your Figma API key |
⭐ 5.0k +67/7d | CLIWeb app | Fixed provider | Registry metadata only | Governance & review | ●●●●● | Self-hosted on‑prem | ●●●●● | Self-hosted — your infrastructure |
Capability profiles
Six axes, 0–5 each. The shape tells you the strategy: a wide hexagon is a generalist, a spike is a specialist. Showing the 8 most established — the rest are in the full catalog.
An open-source, local-first desktop alternative to closed design agents that turns local coding agents and a project's DESIGN.md into composable skills, plugins, and exportable real artifacts (HTML/PDF/PPTX/MP4).
Provides official, multi-language reference implementations of the Model Context Protocol that showcase how to give LLMs secure, controlled access to tools and data.
Exposes the full Chrome DevTools over MCP so agents can control and inspect a live Chrome instance for automation, deep debugging, and performance analysis.
A large, curated collection of 148 domain-specific scientific Agent Skills with unified, provenance-rich access to 100+ scientific databases, packaged to plug into any Agent Skills–compatible host.
The official Python SDK for the Model Context Protocol that provides first-class support for multiple transport modes (stdio, Streamable HTTP, SSE) and lets you build both MCP servers and clients with minimal code.
Bridges local CLI-based coding agents into many instant-messaging platforms so you can chat with your AI dev assistant from anywhere without exposing a public IP.
Combines an AI-first IAM server and an MCP gateway (Model Context Protocol and A2A) in a single, self-hostable product with a web UI.
Provides a full backend platform (database, auth, storage, edge functions, compute and a model gateway) specifically designed to let coding agents operate and ship full‑stack apps end‑to‑end.
All repositories (42)
🎨 Best DeepSeek Harness Design Plugin. The open-source Claude Design alternative. 🖥️ Local-first desktop app…
Turn any AI agent into an AI Scientist. The #1 Agent Skills library for science, used by 190,000+ scientists w…
The official Python SDK for Model Context Protocol servers and clients
MCP server to provide Figma layout information to AI coding agents like Cursor
Bridge local AI coding agents (Claude Code, Cursor, Gemini CLI, Codex) to messaging platforms (Feishu/Lark, Di…
An open-source Agent-first Identity and Access Management (IAM) /LLM MCP & agent gateway and auth server with…
The all-in-one, open-source backend platform for agentic coding. InsForge gives your coding agent database, au…
A Python library for anomaly detection across tabular, time series, graph, text, image, and audio data. 60+ de…
Put an end to code hallucinations! GitMCP is a free, open-source, remote MCP server for any GitHub project
TalkToFigma: MCP integration between AI Agent (Cursor, Claude Code, Codex) and Figma, allowing Agentic AI to c…
Open-source auth gateway connecting 1000+ SaaS providers to AI agents through SDK, CLI, MCP, HTTP, and OpenAPI…
Self-hosted, open-source agent skill registry for enterprises. Publish & version skill packages, govern with R…
Minimal Coding Agent Harness on MCP for ChatGPT, Claude, Hermes, Grok Bot, OpenClaw
🪄 Flint is a visualization language that lets AI agents reliably create expressive, good-looking charts from…
AI agent skills for social media research. Outlier posts, comment mining, competitor teardowns, ad libraries &…
x64dbg-MCP Server is a native MCP (Model Context Protocol) plugin for x64dbg that exposes the debugger's full…
Open-source ETL/ELT you deploy on your own servers or cloud. Built on DuckDB: no-code/low-code visual pipeline…
A visual tool to edit HTML and Markdown files, leave comments like a Google Doc, and send feedback to your AI…
Helping coding agents never make mistakes working with public or private libraries without wasting the context…
Local first, desktop companion platform with animated pets, plugin SDK and coding-agent integrations.
通过扫码或机器人凭据把IM机器人接入DeepSeek Harness（支持飞书、微信、钉钉、企业微信、QQ、Slack、Telegram、Discord和WhatsApp）。 Connect IM bots to Dee…
MCP server for web fetching with Cloudflare bypass, Trafilatura extraction, and smart routing. Free, self-host…
DeFi toolkit for AI agents and coding assistants — deposit funds, execute trades, and manage crypto wallets. W…
ICT/SMC trading-knowledge skill for AI coding agents (Claude Code / Codex / OpenClaw / Hermes)
Attributed, resolvable artifact references for agent handoffs — a ~30-byte token instead of pasted context. MC…
🔥🔥🔥 Turn AI-written code into real apps. Nubase is an open-source, AI-native backend platform for AI Coding…
Open source previs software in the browser: block a scene, pose characters, author camera moves and cuts, then…
Turn your coding agent into a video studio: describe a video in plain language, and your agent writes the time…
A TypeScript CLI framework that ships your commands as a CLI, agent skills, and MCP.
AI-powered annotations for localhost development. Create visual feedback on your apps and let AI coding agents…
Notion CLI with AI agent support. Smart queries, Obsidian sync, batch ops, backups, validation and more.
The first SSH client built for AI agents. Let Claude Code, Codex, and other CLI agents manage your servers thr…
让 AI 助手轻松获取抖音、TikTok、B 站、小红书等 21 个主流平台的数据｜Enable AI assistants to easily access data from 21 mainstream platfo…
Pi adapter for official DeepSeek Harness minimal mode. V4 Pro thinks We need… / I need…, not Let me…
对网页deepseek的封装，实现免费API调用。支持 OpenAI completions / responses socket。可工具调用，可接入codex、copilot。轻量自用
Hosted alternatives
If running your own reviewer is more ops than you want, these managed services cover the same job.
A hosted catalog of managed tool and MCP integrations: connect an agent to hundreds of apps with auth and token refresh handled, instead of running and securing each MCP server yourself.
Try Composio →Exposes Zapier's app library to your agent as a single hosted MCP endpoint, so a model reaches thousands of actions without you standing up connectors.
Try Zapier MCP →A registry and hosting layer for MCP servers: discover a server and run it managed rather than deploying the process and wiring credentials on your own box.
Try Smithery →