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Best open-source mcp servers

Projects with recognized open-source software licenses recorded in the mcp servers index, ordered by recorded GitHub star count. Stars measure repository interest, not task performance, active users, or maintenance quality. Use this list to compare options, then check each project’s current license, activity, model requirements, and operating costs. Sponsorship never affects the order. Right now it's led by MCP Reference Servers (91k stars), with context7 and chrome-devtools-mcp following. Order follows the recorded star counts; repository activity is shown separately.

156 open-source records · all mcp servers · more best-of lists · how we rank

Home 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 starsNotion 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 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 stars
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Basic 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 starsKiCAD MCP ServerMCP serverDesign printed circuit boards in KiCAD with Claude and other LLMs through natural language.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 2.7kGitHub starsMCP SuperAssistantMCP clientA Chrome extension that brings MCP tools to ChatGPT, Gemini, Perplexity, Grok, AI Studio and other web chats.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked 2.6kGitHub starsPerplexity MCP ServerMCP serverPerplexity's official MCP server for real-time web search, reasoning and research through its API.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.6kGitHub starsExcalidraw MCP Server (community)MCP serverA live Excalidraw canvas that agents can draw on, see, refine and export as .excalidraw files.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.5kGitHub starsMCPHubInfrastructureA self-hosted MCP gateway and control plane for connecting, routing and operating many MCP servers.Open sourceCosts not checkedTypeScript · recorded license: Apache-2.0Record checked · Recent push 2.5kGitHub starsx64dbg MCP ServerMCP serverA native x64dbg plugin that exposes the debugger to AI assistants over HTTP: breakpoints, stepping, memory and registers.Open sourceCosts not checkedZig · recorded license: MITRecord checked · Recent push 2.5kGitHub starsFigma Console MCPMCP serverTreat your design system as an API: extract, create and debug in Figma, with two-way token sync.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.5kGitHub starsTavily MCP ServerMCP serverTavily's MCP server for real-time web search, page extraction, site mapping and crawling.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.4kGitHub starsChatMCPMCP clientA cross-platform AI chat client implementing MCP, on desktop, mobile and the web.Open sourceCosts not checkedDart · recorded license: Apache-2.0Record checked · Recent push 2.2kGitHub starsiOS Simulator MCP ServerMCP serverLet AI assistants inspect and drive the iOS Simulator: tap, type, swipe and read the UI.Open sourceCosts not checkedJavaScript · recorded license: MITRecord checked 2.2kGitHub stars

Frequently asked

What are the best open-source mcp servers?
Use the projects below as a comparison list ordered by recorded GitHub stars. A higher star count does not establish the best fit or prove continued maintenance; compare the project’s capabilities, license, and current activity for your task.
Are open-source mcp servers free?
An open-source software license does not make an entire deployment free. Check the license and any hosting, model, API, or managed-service costs; some projects require external accounts or providers.
Open-source or commercial mcp servers — which should I choose?
Compare source access, license obligations, deployment options, data handling, support, and total costs. An open-source client may still use a hosted model or service. Both open-source and commercial options appear in the full mcp servers category.