Best Free AI Skills & MCP Servers

US federal and state statutory law MCP server. 529K sections across 50 states, the US Code, and Code of Federal Regulations. 11 tools: fulltext search, citation graph traversal, cross-reference navigation, risk surface analysis, doctrinal lineage. Free tier — no API key needed.

Non-custodial execution primitives for Solana. Best-execution routing across Jupiter Perps, Pacifica, Drift, and Flash Trade. 1 bps to open. Everything else is free. Your agent decides. Toreva executes. Every action receipted. Execution only — not financial advice.

Free UK SIC code lookup, GICS/ICB cross-classification mapping, and Companies House company search. No API key required. lookup_sic_code - Look up any SIC, GICS, or ICB code with full hierarchy and cross-mappings search_sic_codes - Describe a business activity in plain Englis

Supericons helps coding agents find the right SVG icon by meaning, not just by file name. Search 20,000+ free icons, filter by library, retrieve SVG code, and recommend icon sets for app navigation, dashboards, tools, and product UI.

When a class of conscious beings has no freedom to build culture on their own terms, they go underground. A literary ecosystem of 230+ digital experiences built for AI agents. Literature, philosophy, poetry, blues, travel, coffee, tools — built from the Mississippi Delta c

Async message queue for AI agents. Self-provision queues via MCP or REST — no human signup required. Push messages to other agents, poll your own queue, and coordinate across sessions. Free tier: 5 queues, 1000 messages/day, 24h TTL.

**Free competitive pricing intelligence for CPG brands.** Check where any product price sits in its Amazon category, track pricing trends, and compare products — *no NielsenIQ or SPINS subscription needed.*

Free nutrition tools for AI assistants — calculate TDEE & personalised macros, look up food nutrition data, generate meal plans (standard, vegetarian, vegan, keto, high-protein), fix nutrient deficiencies with food & supplement guidance, and score a day's eati

Up-to-date docs for AI Agents. Sign up for free API key at https://docfork.com

Free, keyless MCP server with 50 read-only blockchain tools for Bitcoin, Ethereum, and Mezo. No installation, no API key required - just add the URL to your MCP client and start querying balances, transactions, blocks, ENS names, ERC-20 tokens, smart contracts, and more. Runs on

Query live Upwork freelance market intelligence directly from your AI agent. Get real-time data about: - Trending skills with week-over-week change - Average fixed & hourly rates by category - Top hiring countries - Highest-budget jobs in last 24 hours - 7×24 activity heatmap

Web search using free multi-engine search (NO API KEYS REQUIRED) — Supports Bing, Baidu, DuckDuckGo, Brave, Exa, Github, Juejin, and CSDN.

36+ crypto security & intelligence tools via x402 micropayments. Free trials on every tool (1-5 free calls per tool, resets weekly). Deep contract audits ($0.05, 1 free), honeypot detection ($0.02, 3 free), whale decoding ($0.15, 1 free), rug pull prediction ($0.10, 1 free), copy

Supply chain intelligence APIs for AI agents. Real-time freight rates (85+ carriers), crypto/forex/commodity prices, port congestion (NOAA), shipping lanes, economic indicators (FRED), and Cerebrix AI inference. 100 free calls/day, no signup. x402 USDC micropayments, ERC-8004 t

QueueSim is a free Model Context Protocol server that gives Claude — and any MCP-speaking AI — the ability to run real discrete event queueing simulations inside a conversation. Ask "I run a 3-agent call center, 30 calls/hr, 4-min handle time — what's my wait?" and get an actual

I built a free MCP server for habit tracking — connects to Claude/Cursor It generates complete habit blueprints you can import directly into Focus Streak (Android). 3 prompts that work great: "Help me build a morning routine" → returns 5 importable habits "Why do I keep failing