System class · No. 01
MCP Servers
Model Context Protocol servers that connect AI agents to tools, APIs, and data sources.
MCP servers implement the Model Context Protocol — a standard that lets AI agents reach external tools, APIs, and data through one consistent interface, instead of a bespoke integration per client. A server can connect to a database, a SaaS API, a filesystem, a browser, or an internal service. Choose by the actions it exposes, the data it can access, and its authentication, permissions, and rate limits. Check the publisher and documented support whether the server is first-party or community-maintained. Transport matters too: stdio servers run locally beside the client, while HTTP servers can run remotely and be shared across a team.
Review requested credentials and any ability to write data or execute code; use narrowly scoped access where supported. License terms, hosting costs and underlying API fees are separate checks. Recent commits show repository activity, not a security assessment or proof of ongoing support. Read release notes and security guidance, inspect the configuration, and start with a limited test before granting access to sensitive data or consequential actions.
Repository-listed tools
Stars measure repository interest. A public repository does not establish an open-source license, product quality or active users; check each record and its official documentation.
Ghidra MCP ServerMCP serverHundreds of MCP tools that bring Ghidra's reverse-engineering capabilities to AI assistants.Open sourceCosts not checkedJava · recorded license: Apache-2.0Record checked · Recent push 5.5kGitHub starswigoloMCP serverLocal-first web search, fetch, crawl, extraction and research for AI coding agents, without API keys.Open sourceCosts not checkedTypeScript · recorded license: AGPL-3.0Record checked · Recent push 5.5kGitHub stars5ireMCP clientA cross-platform desktop AI assistant and MCP client with a local knowledge base.License not checkedFreeTypeScriptRecord checked · Recent push 5.4kGitHub starsZotero MCPMCP serverSearch, read and annotate your Zotero research library from Claude, ChatGPT and other MCP clients.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 5.3kGitHub starsPeekabooMCP servermacOS screen capture, accessibility inspection and native UI automation as a CLI, app and MCP server.Open sourceCosts not checkedSwift · recorded license: MITRecord checked · Recent push 5.3kGitHub starsagentgatewayInfrastructureAn open-source Rust proxy for agent-to-LLM, agent-to-tool (MCP) and agent-to-agent (A2A) traffic.Open sourceCosts not checkedRust · recorded license: Apache-2.0Record checked · Recent push 5.3kGitHub starsMCP-UISDK / libraryTypeScript and Python SDKs implementing the MCP Apps standard for interactive UI delivered over MCP.Open sourceCosts not checkedTypeScript · recorded license: Apache-2.0Record checked · Recent push 5.2kGitHub starsMCP Go SDK (official)SDK / libraryThe official Go SDK for building MCP clients and servers, maintained with Google.Open sourceCosts not checkedGo · recorded license: MIT AND Apache-2.0Record checked · Recent push 5.2kGitHub starsexa-mcp-serverMCP serverExa MCP for web search and web crawling!Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 5.1kGitHub starsHome Assistant MCP (ha-mcp)MCP serverAn unofficial, comprehensive MCP server for controlling devices and managing automations in Home Assistant.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 5.0kGitHub starsagent-deviceMCP serverLet coding agents run, inspect and verify mobile, TV, web and desktop apps through a CLI or MCP.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 5.0kGitHub starsdeep-researchMCP serverUse any LLMs (Large Language Models) for Deep Research. Support SSE API and MCP server.Open sourceCosts not checkedJavaScript · recorded license: MITRecord checked 4.7kGitHub stars
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Notion MCP ServerMCP serverNotion's MCP server for searching, reading and editing a workspace; Notion now recommends its hosted version.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 4.7kGitHub starsContextForge (IBM MCP Context Forge)InfrastructureIBM's open-source gateway and registry that federates MCP, A2A and REST/gRPC APIs behind one governed endpoint.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 4.6kGitHub starscsharp-sdkSDK / libraryThe official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.License not checkedCosts not checkedC#Record checked · Recent push 4.6kGitHub starsMCP Server for Obsidian (mcp-obsidian)MCP serverRead, search, append to and patch notes in an Obsidian vault from an MCP client.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 4.5kGitHub starsUnity MCP (AI Game Developer)MCP serverUnity Editor and in-game MCP tools, agent skills and a CLI, including LLM use inside compiled games.Open sourceCosts not checkedC# · recorded license: Apache-2.0Record checked · Recent push 4.4kGitHub starsmcp-server-chartMCP serverA visualization mcp & skills contains 25+ visual charts using @antvis. Using for chart generation and data analysis.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked 4.4kGitHub starsCloudflare MCP ServersMCP serverCloudflare's official remote MCP servers for docs, Workers bindings, builds, observability, containers and browser rendering.Open sourceCosts not checkedTypeScript · recorded license: Apache-2.0Record checked · Recent push 4.4kGitHub starsSpec Workflow MCPMCP serverSpec-driven development for AI agents: requirements, design and tasks with approvals and a live dashboard.Open sourceCosts not checkedTypeScript · recorded license: GPL-3.0Record checked 4.3kGitHub starsCodeGraphContextMCP serverIndex a local codebase into a graph database and query its call chains from AI assistants over MCP.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 4.3kGitHub starsexcel-mcp-serverMCP serverA Model Context Protocol server for Excel file manipulationOpen sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 4.2kGitHub starsBasic MemoryMCP serverPersistent AI memory as local Markdown files that both you and the model can read and edit.Open sourceCosts not checkedPython · recorded license: AGPL-3.0Record checked · Recent push 4.2kGitHub starsRMCP: MCP Rust SDK (official)SDK / libraryThe official Rust SDK for MCP, built on the tokio async runtime.Open sourceCosts not checkedRust · recorded license: MIT AND Apache-2.0Record checked · Recent push 4.0kGitHub starsPlaywriterMCP serverLet agents control your own running Chrome through an extension, with the full Playwright API via CLI or MCP.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 4.0kGitHub starsMicrosoft MCP Servers (Azure MCP Server)MCP serverMicrosoft's repository that builds the Azure MCP Server and other official Microsoft MCP servers.Open sourceCosts not checkedC# · recorded license: MITRecord checked · Recent push 3.8kGitHub starsMCP Feedback EnhancedMCP serverPause an AI coding agent to collect your feedback in a web UI or desktop app before it finishes.Open sourceCosts not checkedJavaScript · recorded license: MITRecord checked · Recent push 3.8kGitHub starsMCP Java SDK (official)SDK / libraryThe official Java SDK for MCP clients and servers, maintained with Spring AI.Open sourceCosts not checkedJava · recorded license: MITRecord checked · Recent push 3.7kGitHub starsLaravel BoostMCP serverThe official Laravel MCP server that gives AI coding tools Laravel-specific context and structure.Open sourceCosts not checkedPHP · recorded license: MITRecord checked · Recent push 3.6kGitHub starsDBHubMCP serverA minimal, token-efficient MCP server for Postgres, MySQL, MariaDB, SQL Server, Oracle and SQLite.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 3.6kGitHub starsGrafana MCP ServerMCP serverGrafana's official MCP server for dashboards, datasources, Prometheus and Loki queries and more.Open sourceCosts not checkedGo · recorded license: Apache-2.0Record checked · Recent push 3.6kGitHub starsDaVinci Resolve MCP ServerMCP serverLet AI assistants control DaVinci Resolve Studio through its official scripting API: edit, organise, grade and render.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 3.5kGitHub starsGoogle Analytics MCP ServerMCP serverGoogle's experimental MCP server for querying Google Analytics accounts, reports and realtime data.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 3.4kGitHub starsPostgres MCP ProMCP serverA Postgres MCP server with index tuning, EXPLAIN plans, health checks and configurable safe SQL execution.Open sourceCosts not checkedPython · recorded license: MITRecord checked 3.4kGitHub starsGoogle Workspace MCP ServerMCP serverNatural-language control of Gmail, Calendar, Drive, Docs, Sheets, Slides, Forms, Tasks, Contacts and Chat.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 3.3kGitHub starsFastMCP (TypeScript)SDK / libraryA TypeScript framework for MCP servers with sessions, authentication and HTTP streaming.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 3.3kGitHub starsArXiv MCP ServerMCP serverA local MCP server for reading arXiv papers section by section from their original LaTeX, with BibTeX and topic watches.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 3.2kGitHub starsAbleton MCPMCP serverControl Ableton Live from Claude and other MCP clients: create tracks, arrange clips and edit sessions.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 3.2kGitHub starsSnyk Agent ScanInfrastructureDiscover and scan the agents, MCP servers and skills on your machine for prompt injection and vulnerabilities.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 3.1kGitHub starsshadcn/ui MCP ServerMCP serverGive AI assistants shadcn/ui v4 component source, demos, blocks and metadata for React, Svelte, Vue and React Native.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 3.0kGitHub starsMarkdownify MCP ServerMCP serverConvert PDFs, images, audio, Office files, web pages and YouTube transcripts to Markdown for AI assistants.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 3.0kGitHub starsSupabase MCP ServerMCP serverSupabase's official MCP server for managing tables, config and data in your Supabase projects from AI assistants.Open sourceCosts not checkedTypeScript · recorded license: Apache-2.0Record checked · Recent push 2.9kGitHub starsMCP Apps (spec and SDK)SDK / libraryThe official specification and SDK for MCP Apps: interactive UIs served by MCP servers inside AI chat clients.Open sourceCosts not checkedTypeScript · recorded license: MIT AND Apache-2.0Record checked · Recent push 2.9kGitHub starsGodot AIMCP serverConnect Claude Code, Codex and other MCP clients to a live Godot editor to build scenes and edit scripts.Open sourceCosts not checkedGDScript · recorded license: MITRecord checked · Recent push 2.9kGitHub starsjadx-ai-mcpMCP serverPlugin for JADX to integrate MCP serverOpen sourceCosts not checkedJava · recorded license: Apache-2.0Record checked · Recent push 2.9kGitHub starsAgent Toolkit for AWSMCP serverAWS's official MCP servers, skills and plugins that help coding agents build and deploy on AWS.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 2.8kGitHub starsFreeCAD MCPMCP serverControl FreeCAD from Claude Desktop and other MCP clients: create models, run scripts and FEM analyses.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 2.8kGitHub starsPaper Search MCPMCP serverSearch and download academic papers from arXiv, PubMed, bioRxiv, Semantic Scholar and many more sources.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 2.8kGitHub starsmcp-proxyInfrastructureBridge MCP transports: run a remote SSE or streamable HTTP server over stdio, or expose a stdio server over HTTP.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 2.8kGitHub starsBright Data MCPMCP serverWeb search, scraping with unblocking, structured extraction and browser automation for AI agents.Open sourceCosts not checkedJavaScript · recorded license: MITRecord checked · Recent push 2.7kGitHub stars
Frequently asked
- What is an MCP server?
- An MCP (Model Context Protocol) server exposes a tool, API, or data source to AI agents through a standard protocol, so any MCP-compatible client can use it without a custom integration.
- How do I choose an MCP server?
- Check the publisher, documented support, exposed actions, requested access and authentication. Recent commits are an activity signal; they do not establish security or suitability for your task.
- Are MCP servers free?
- Check each server's license and hosting terms separately from the underlying API or service. A free server can still require paid accounts, usage fees or compute.