Best Open Source AI Skills & MCP Servers

Agent-first MCP server: AI coding agents find, compare, verify, and stack-build the right open-source tools across 35+ registries (npm, PyPI, Cargo, Maven, Go, RubyGems, NuGet, Hex, Composer, and more). Graph-aware ranking + version-aware compatibility in

Personalized GitHub issue finder with multi-strategy search, deep vetting, and viability scoring — CLI, library, MCP server, and Claude Code plugin

Antigravity-CLI Plugin. 309 community agent skills aggregated from 13 popular open-source repositories, one-command install.

Tuning Engines CLI, MCP server, and Python agent runtime adapters for governed model, agent, skill, and MCP workflows. Fine-tune open-source LLMs, run inference, manage datasets/evaluations, and connect LangGraph or Temporal while Tuning Engines handles p

Official Infisical MCP Server

OSINT intelligence MCP server — Shodan, VirusTotal, SecurityTrails, Censys, DNS, WHOIS, crt.sh, Wayback, BGP

Open-source cross-agent memory layer for coding agents across Cursor, Claude Code, Codex, Windsurf, Gemini CLI, Copilot, Kiro, OpenCode, Antigravity, and Trae via MCP.

Open-source CLI to minimize LLM token usage via smart code context extraction

An open-source MCP server for Answer Engine Optimization (AEO) monitoring.

Reconnaissance for Roblox game devs and their agents — open-source MCP server + CLI for Roblox game analytics.

Open-source browser automation MCP server. Control your real Chrome from any AI agent.

Open-source security scanner for Model Context Protocol (MCP) servers. Audits Claude Desktop, VS Code, Cursor, Windsurf, and 16+ AI tools for secrets, prompt injection, supply-chain risks, and 17+ security checks.

Hive Mind for AI coding agents — the first open-source brain that works with sub-agents. v6.0.2 ships 19 world-first features: 5 viral artifacts (Brain Replay timeline, Brain DNA fingerprint card, Hive Voice consensus chart, Brain Time Capsule snapshots,

Open-source MCP server to publish to Dev.to, Ghost, Hashnode, WordPress, Medium, Substack, LinkedIn, X, Bluesky, and Mastodon from Claude Code. Local stdio, no cloud relay. Includes SEO scoring, JSON-LD schema, canonical-URL wiring, social-post generation

Give AI eyes and hands on your desktop. ScreenHand is an open-source MCP server that lets Claude and other AI agents see your screen, click buttons, type text, and control any app on macOS and Windows.

Open-source GoHighLevel alternative for agencies. 146+ MCP tools that let Claude Code spin up white-labeled client workspaces — CRM, booking, intake forms, landing pages, AI chatbot, and pre-wired agent archetypes (speed-to-lead, missed-call-text-back, re

Open-source terminal AI agent. 100+ specialist skills + audit-grade finance infra via @kernel.chat/kbot-finance. Content-addressed envelopes, hash-chained audit log, jurisdiction-aware regulatory verifier. The AI Intelligence Layer never produces the numb

Open-source Cursor toolkit: local hooks, MCP server & sidebar extension for dialectical prompt and response oversight — privacy-first session quality.

Open-source MCP server that turns Claude into a GTM operator — design sequences, connect mailboxes, send outreach, all from chat.

Open-source CLI scanner for risky MCP server and AI agent tool configuration.

Open-source control plane for AI coding agents: budget caps, verifier gates, rollback evidence, and audit trails.

Alias for verbiflow-mcp — open-source GTM MCP server for Claude.

Alias for verbiflow-mcp — open-source sales outreach MCP server for Claude.