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System class · No. 01

MCP Servers

Model Context Protocol servers that connect AI agents to tools, APIs, and data sources.

171 records · independent index · how we rank

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.

Building one yourself? How to build an MCP server →

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.

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By language: TypeScript mcp servers · Python mcp servers · Go mcp servers · JavaScript mcp servers

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xmcpSDK / libraryA TypeScript framework for building and shipping MCP servers, with file-system routing and hot reload.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.3kGitHub starsGarmin MCP ServerMCP serverExpose your Garmin Connect activities, health metrics and training data to Claude and other MCP clients.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 1.3kGitHub starsJupyter MCP ServerMCP serverLet AI agents read, edit and run Jupyter notebooks in real time, locally or in hosted sandboxes.Open sourceCosts not checkedPython · recorded license: BSD-3-ClauseRecord checked · Recent push 1.3kGitHub starsMCPJungleInfrastructureA self-hosted gateway and registry that puts all your MCP servers behind one endpoint.Open sourceCosts not checkedGo · recorded license: MPL-2.0Record checked 1.3kGitHub starsmcp-searxngMCP serverPrivate web search for AI assistants via SearXNG — supports Claude, Cursor, and any MCP clientOpen sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.3kGitHub starsBurp Suite MCP ServerMCP serverPortSwigger's official extension that connects Burp Suite to AI clients over MCP.Open sourceCosts not checkedKotlin · recorded license: GPL-3.0Record checked · Recent push 1.2kGitHub starsColab MCPMCP serverGoogle Colab's MCP server that bridges a local agent to a Colab notebook session in the browser.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked 1.2kGitHub starsPower BI Authoring MCP ServerMCP serverMicrosoft's MCP server for building and modifying Power BI semantic models from AI agents.Open sourceCosts not checkedrecorded license: MITRecord checked · Recent push 1.2kGitHub starsGoogle Calendar MCP ServerMCP serverManage Google Calendar events across multiple accounts and calendars from Claude and other assistants.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.2kGitHub starsRef MCPMCP serverToken-efficient documentation search and reading for coding agents, across public and private libraries.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.2kGitHub starsRhinoMCPMCP serverModel geometry and build Grasshopper definitions in Rhino 3D by chatting with Claude or Cursor.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 1.1kGitHub starsMongoDB MCP ServerMCP serverMongoDB's official MCP server for querying databases and managing Atlas clusters from AI agents.Open sourceCosts not checkedTypeScript · recorded license: Apache-2.0Record checked · Recent push 1.1kGitHub stars
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ObotInfrastructureAn open-source platform for governing an organisation's AI clients, models, MCP servers and skills.Open sourceCosts not checkedGo · recorded license: MITRecord checked · Recent push 1.1kGitHub starsAtlassian Rovo MCP ServerMCP serverAtlassian's official remote MCP server for Jira, Confluence, Jira Service Management, Bitbucket and Compass.Open sourceCosts not checkedJavaScript · recorded license: Apache-2.0Record checked · Recent push 1.1kGitHub starsCisco MCP ScannerInfrastructureScan MCP servers and tools for malicious behaviour with YARA rules, LLM analysis and Cisco AI Defense.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 1.1kGitHub starsFetcher MCPMCP serverFetch JavaScript-rendered web pages with a headless browser and return their main content as HTML or Markdown.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked 1.1kGitHub starsarcade-mcpMCP serverMCP Server Framework and Tool Development library for building custom capabilities into agents.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 1.0kGitHub starsGoogle Sheets MCP (mcp-google-sheets)MCP serverCreate, read and modify Google Sheets and find spreadsheets in Drive from any MCP client.Open sourceCosts not checkedPython · recorded license: MITRecord checked 1.0kGitHub starsMCPM (MCP Manager)InfrastructureA CLI package manager and registry for MCP servers that works across clients, with profiles and a router.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 1.0kGitHub starsconciergeSDK / libraryUniversal SDK for building next-gen MCP serversLicense not checkedCosts not checkedPythonRecord checked 528GitHub starsglanceMCP serverAI-powered browser automation MCP server for Claude Code. Navigate, click, screenshot, test — all from your terminal.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked 156GitHub 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.