MCP AI apps

Open-source MCP server giving AI clients terminal and file control.

Desktop Commander is an open-source Model Context Protocol server that lets MCP clients like Claude Desktop, Cursor, and VS Code run terminal commands, search the file system, and make surgical diff-based edits. It manages long-running processes, reads and writes files (including Excel and PDF), and turns an AI assistant into a hands-on coding and automation agent on your own machine. Free and MIT-licensed, with one of the larger community followings among MCP servers.

MCP server registry, inspector, and gateway.

A discovery and hosting hub for the Model Context Protocol ecosystem: browse a large indexed catalog of MCP servers, test them in an in-browser Inspector, and route them through a managed Gateway that handles credentials, logging, and analytics. Browsing and installing open-source servers locally is free; hosting servers on Glama's infrastructure and the Gateway's managed features are paid. Also ships an AI playground chat client over the connected tools.

Up-to-date, version-specific library docs piped into any AI coding agent via MCP.

An MCP server from Upstash that pulls current, version-specific documentation and code examples for a library and feeds them straight into an LLM's context. It exposes two tools — resolve-library-id and a docs query — so agents in Cursor, Claude Code, Windsurf, and other MCP clients generate code against the real, current API.

Microsoft's official MCP server for browser automation, driven by Playwright.

An open-source Model Context Protocol server from Microsoft that lets LLMs and agents browse and act on the web through Playwright. It exposes 40+ tools for navigation, forms, clicking, network mocking, tracing, and more, operating on structured accessibility snapshots rather than pixels so each interactive element gets a deterministic ref. Works with Claude, VS Code, Cursor, Windsurf, and any MCP client.

The MCP runtime for secure, authenticated agent tool-calling.

A platform that lets AI agents take real, authenticated actions across business systems like Gmail, GitHub, Slack, and Notion. Arcade handles the hard part of agent tool-use — secure, per-user authorization — so a tool call runs with the actual end user's permissions rather than a shared API key. It ships agent-optimized prebuilt tools plus an open framework for building custom ones, exposed over MCP. A free tier is available for getting started.

Registry and hosting platform for Model Context Protocol servers.

A central hub for the MCP ecosystem: browse, install, and configure thousands of community-built MCP servers from one place, or deploy your own to Smithery's infrastructure and access it remotely. The CLI installs and manages servers without hand-editing JSON config, and the hosted tier adds managed OAuth and persistent connections so agents get authenticated tool access. Lists over 6,000 servers across developer tools, data connectors, and productivity integrations.

The fast, Pythonic way to build MCP servers and clients.

An open-source Python framework for building Model Context Protocol servers and clients. You declare a tool as a Python function and FastMCP generates the schema, validation, and protocol plumbing, and handles transport, auth, and the connection lifecycle for you. FastMCP 1.0 was folded into the official MCP Python SDK; v2 is the actively developed standalone superset. The framework is free and Apache-2.0; Prefect's Horizon platform adds managed hosting and enterprise governance.

1000+ authenticated toolkits for AI agents, via MCP or API.

Tool layer that gives AI agents secure, managed access to 1000+ toolkits and 20,000+ tools across SaaS apps, exposed via MCP or direct APIs. It handles authentication, tool search, and context management, and its MCP Gateway hands each team a managed endpoint to paste into Claude, Cursor, or ChatGPT. The core is MIT-licensed; a free tier covers 20K tool calls per month.

Reads + writes GitHub from any MCP-aware agent.

Official GitHub MCP server. Wired into Claude Code and most agentic surfaces to read PRs, post comments, create branches, and run secret-scanning.

Postgres + auth + edge functions from inside the agent.

MCP server that exposes Supabase project ops — list tables, apply migrations, deploy edge functions, fetch advisors. Removes a context-switch cliff between code and database.