Every option in the catalog for when you need to connect an AI assistant to your own tools and data — 15 MCP servers, registries and toolkits, 15 of them free or freemium, with the pricing tier printed on every row.
Flocci AI Tools lists 15 of them, ordered free tiers first: MCP Registry (Official), Agent2Agent (A2A) Protocol, FastMCP, GitHub MCP Server and MCP Inspector. Every one of them is free or has a free tier. Each entry states what it uniquely does rather than a score.
10 on this page are marked fully free with no paid plan at all: MCP Registry (Official), Agent2Agent (A2A) Protocol, FastMCP, GitHub MCP Server and MCP Inspector. The remaining 5 are freemium, trial or paid, and each is labelled with its exact tier so nothing surprises you at sign-up.
Free tools first, then freemium, then trial, then paid, and alphabetically inside each tier. Nobody pays to appear higher: Flocci AI Tools carries no ads, no sponsored slots and no paid listings, so the order reflects price and nothing else.
MCP Registry (Official), Composio, Glama, Smithery and Zapier MCP all work in a browser tab with no install needed — just open the site and go. 5 of the 15 free MCP servers, registries and toolkits listed here are browser-based.
mcp-use, Composio, Glama, Smithery and Zapier MCP support Google sign-in, so you can start without creating a new account. That's 6 of the 15 free MCP servers, registries and toolkits on this page.
Agent2Agent (A2A) Protocol, FastMCP, GitHub MCP Server, MCP Inspector and MCP Python SDK can be self-hosted or run locally without a browser — useful for privacy, air-gapped networks, or avoiding API rate limits. 8 of the 15 free MCP servers, registries and toolkits here run offline.
| Tool | Pricing | Type | Listed for |
|---|---|---|---|
| MCP Registry (Official) | Free | MCP Ecosystem | The canonical open-source specification and docs for the Model Context Protocol |
| Agent2Agent (A2A) Protocol | Free | MCP Ecosystem | Open protocol for agents from different vendors to discover and talk to each other |
| FastMCP | Free | MCP Ecosystem | Pythonic framework for building MCP servers and clients in a few lines |
| GitHub MCP Server | Free | MCP Ecosystem | GitHub's official MCP server for repos, issues, PRs and Actions |
| MCP Inspector | Free | MCP Ecosystem | Visual testing and debugging tool for MCP servers |
| MCP Python SDK | Free | MCP Ecosystem | Official Python SDK for MCP servers and clients |
| MCP TypeScript SDK | Free | MCP Ecosystem | Official TypeScript SDK for MCP servers and clients |
| mcp-use | Free | MCP Ecosystem | Fullstack framework for building MCP servers and MCP Apps for ChatGPT and Claude |
| MetaMCP | Free | MCP Ecosystem | Aggregates many MCP servers behind one endpoint with a web UI |
| Official MCP Reference Servers | Free | MCP Ecosystem | Reference MCP servers such as filesystem, git, fetch and memory |
| Composio | Freemium | MCP Ecosystem | Managed auth + tool-call infrastructure for agents across 250+ apps |
| Glama | Freemium | MCP Ecosystem | Indexes and security-scans thousands of MCP servers for compatibility/safety |
| Smithery | Freemium | MCP Ecosystem | Marketplace of 14,000+ hosted MCP servers with one-click connect |
| Zapier MCP | Freemium | MCP Ecosystem | Turns any of Zapier's 9,000+ app integrations into callable MCP tools for any AI client |
| Cloudflare MCP | Freemium | MCP Ecosystem | Build and deploy remote MCP servers directly on Cloudflare Workers with built-in OAuth |