Best Oss AI Skills & MCP Servers

Package version intelligence — latest version, diff, changelog, audit across npm/pypi/github/gitlab.

Rename refactoring — rename symbols across files, rename files with import updates, bulk rename with preview.

Slack MCP without OAuth. 21 tools (16 read/write Slack + 2 workflow profile primitives + 3 hosted-brain upgrade stubs). Free OSS or hosted (free tier no card; $9/mo Pro = unlimited; morning DM rolling out Q2 2026).

Model Context Protocol (MCP) server integration for @ttoss/http-server

MCP server for Alexandria — 171 expert AI agents across 22 teams, accessible from Claude Desktop and Claude Code

Query WHO Global Health Observatory data — 3,059 indicators across 194 member states with country, region, year, and sex filters via MCP. STDIO or Streamable HTTP.

HMRC Making Tax Digital API client and MCP server — reusable across projects

Create a Context Hub — a personal AI context layer shared across any MCP client (Claude.ai, Claude Code, Claude App, ChatGPT, Perplexity, Cursor, and more). One command to scaffold, deploy, and connect.

MCP server for Section 8 Fair Market Rent (FMR) lookups — ZIP code search, state/county browsing, historical trends, and HUD glossary

Cross-agent permission policy specification for AI coding agents

Model Context Protocol server for AgentMinds — gives Claude Code, Cursor, Zed, and other MCP-aware AI clients native access to the AgentMinds cross-site collective intelligence pool. Push agent reports, pull personalised recommendations, browse the networ

🧴 Sync your AI agent configurations and rules across platforms with ease

Planu — MCP Server for Spec Driven Development with native Rust acceleration for hot paths. Cross-platform (Linux/macOS/Windows, x64/arm64, glibc/musl).

MIND MCP Server — 28 tools. The most complete AI memory layer with the Focus → Project → Outcome → Task hierarchy (mind_focuses + extended mind_life with item_type/parent_id/focus_id and cross-account project sharing via share/list_shares/revoke_share), d

Universal AI API Orchestrator — 1,598 tools across 106 services. UCP (Universal Commerce Protocol), the .0n App Marketplace, AI Course Builder, Lead Magnet Loop, Automation Builder, SaaS Factory, App Builder, Website Builder, and the Agentic Automation Ge

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.

Log10x MCP Server — per-pattern log cost attribution, root-cause investigation, pasted-batch triage, archive query/backfill, and cross-pillar correlation against customer metric backends (Grafana Cloud, Mimir, Thanos, AMP) with structural validation that

Deployment tool and support utility for AI context. Copies agents, skills, commands, rules, and behaviors into the paths each AI platform reads (Claude Code, Codex, Copilot, Cursor, Warp, OpenClaw, and 6 more) so one source of truth works across 10 platfo

One config to rule them all — sync MCP servers, skills, and AGENTS.md across Codex, Claude Code/Desktop, Gemini CLI, Cursor, Copilot VS Code/CLI, Antigravity, Windsurf, OpenCode, and Junie.

Reduce Claude Code token usage by 70-90% with cross-session memory and four-layer optimization: semantic codebase indexing, PostToolUse tool compression, turn summarization, and session consolidation. MCP server powered by Ollama — zero API calls, runs en

Cross-agent permission policy specification for AI coding agents

Cross-agent permission policy specification for AI coding agents

Cross-agent permission policy specification for AI coding agents

Give Claude Code superpowers — parallel multi-model queries, smart routing, and image/video generation across OpenAI (GPT-5, o-series, GPT Image), Gemini (Imagen 4, Veo, Nano Banana), DeepSeek, Kimi, Grok, and 12+ providers