Best Al AI Skills & MCP Servers

APIValidator Model Context Protocol (MCP) server for local validation, OpenAPI security auditing, and premium global telephone/IBAN verification.

Search LOC digital collections, browse Chronicling America newspapers with full OCR text, and look up LC Subject Headings via MCP. STDIO or Streamable HTTP.

Tapal — universal mail MCP server. Plug into Claude Desktop, Claude Code, Codex, Gemini CLI, Cursor, Windsurf, Zed, Continue.dev, LangChain, CrewAI, AutoGen — and let any AI agent read, search, draft, organize, and triage your email. Apple Mail today; Out

MCP server for AI assistants: read, write, edit, and manage files securely on local filesystem.

CLI for Xenarch — non-custodial x402 MCP server for AI agents. Claude, Cursor, LangChain and CrewAI pay HTTP 402–gated APIs with USDC on Base L2.

AI-powered MCP server for codebase navigation and LLM prompt optimization

AINative Browser Agent MCP Server — 6 AI-powered browser automation tools for web interaction, structured data extraction, page validation, multi-step tasks, and memory enrichment. Auto-detects ZeroLocal vs Cloud.

Screen-reader navigation cost analyzer. Measures how hard it is for AT users to discover, reach, and operate web content.

AI code impact analysis MCP server — dependency graphs, cascade detection, and a mandatory build gate for AI coding agents

Queen Claude MCP server - streamlined with 14 essential tools for Next.js development

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

MCP server for Formulon Excel-compatible formula and workbook evaluation

AI-native MCP server for business management — invoices, expenses, deposits, clients, products, quotes, webhooks, CRM. 62 tools. Remote endpoint at mcp.frihet.io (zero install). Works with Claude, Cursor, Windsurf, Cline.

Cross-Code Organizer (CCO, formerly Claude Code Organizer) — manage AI coding tool configs across Claude Code, Codex CLI, and more. Memories, skills, MCP servers, commands, agents, rules, and hooks across global and project scopes

AI-powered idea & task manager for developers. Brainstorm → structured tasks → AI agent execution. CodeMirror editor with slash commands, MCP Server, Claude/Gemini/Codex support. Local-first SQLite, cross-PC Git sync.

Search and retrieve US court opinions, federal dockets, judge records, citation networks, and oral arguments from CourtListener's 9M+ opinion corpus via MCP. STDIO or Streamable HTTP.

iMessage MCP server — 25 tools for searching, analyzing, and exploring your entire iMessage history on macOS

GitHub security posture audit tools for AI agents — organization, repository, Actions, secrets, supply chain analysis via MCP

Model Context Protocol server for Cursor Cloud Agents API - programmatically create, manage, and interact with AI-powered coding agents through MCP stdio transport. Integrate automated code generation, repository management, and agent workflows into your

High-performance WebAssembly theorem prover with dependent types, hash-consing (150x faster), Ed25519 proof signatures, MCP support for Claude Code, AgentDB vector search, episodic memory, and ReasoningBank learning. Formal verification with cryptographic

Search bills, legislators, committees, and events across all 50 US states, DC, and Puerto Rico via MCP. STDIO or Streamable HTTP.

MCP Server for i-AUD MTSD document validation, generation, schema querying, control info extraction, and database operations

SDK, CLI, and MCP server for anton.app — track children's learning progress, browse lessons, manage assignments

MCP Server for Claude Code, Cursor, Cline, Copilot, Github Copilot, Windsurf - Visual AI Agent Plan Execution, Approval Workflow, Plan Visualization, Agent Orchestration. See what your AI is thinking before it writes code. Works with Claude, GPT, Gemini,