Open source · JavaScript
Best JavaScript mcp servers
The 11 open-source mcp servers written in JavaScript in this index, ranked by real maintained adoption (GitHub stars and recent commit activity), never by sponsorship. firecrawl-mcp-server leads the set at 7,502 GitHub stars, and 9 of the 11 have shipped a commit in the last 90 days. Every project here is JavaScript-first, self-hostable, and free to run; the trade-off is you host and maintain it yourself. Right now it's led by firecrawl-mcp-server (7.5k stars), with browser-tools-mcp and Talk to Figma MCP (Grab) close behind. Rankings shift as projects gain stars and ship commits.
firecrawl-mcp-serverMCP serverOfficial Firecrawl MCP Server - Adds powerful web scraping and search to Cursor, Claude and any other LLM clients.Open sourceJavaScript · MITVerified · Active 7.5kGitHub starsbrowser-tools-mcpMCP serverMonitor browser logs directly from Cursor and other MCP compatible IDEs.Open sourceJavaScript · MITVerified · Active 7.3kGitHub starsTalk to Figma MCP (Grab)MCP serverLet Cursor, Claude Code or Codex read and modify Figma designs through a plugin and WebSocket bridge.Open sourceJavaScript · MITVerified 7.0kGitHub starsGodot MCPMCP serverLaunch the Godot editor, run projects and read debug output from an AI assistant.Open sourceJavaScript · MITVerified 5.8kGitHub starsdraw.io MCP ServerMCP serverThe official draw.io MCP server: create diagrams inline in chat or open them in the draw.io editor.Open sourceJavaScript · Apache-2.0Verified · Active 5.5kGitHub starsdeep-researchMCP serverUse any LLMs (Large Language Models) for Deep Research. Support SSE API and MCP server.Open sourceJavaScript · MITVerified 4.7kGitHub starsMCP Feedback EnhancedMCP serverPause an AI coding agent to collect your feedback in a web UI or desktop app before it finishes.Open sourceJavaScript · MITVerified · Active 3.8kGitHub starsBright Data MCPMCP serverWeb search, scraping with unblocking, structured extraction and browser automation for AI agents.Open sourceJavaScript · MITVerified · Active 2.7kGitHub starsiOS Simulator MCP ServerMCP serverLet AI assistants inspect and drive the iOS Simulator: tap, type, swipe and read the UI.Open sourceJavaScript · MITVerified · Active 2.2kGitHub starsMCP Server for MySQLMCP serverLet Claude and other LLMs inspect MySQL schemas and run queries, read-only unless you opt in to writes.Open sourceJavaScript · MITVerified 2.1kGitHub starsAtlassian Rovo MCP ServerMCP serverAtlassian's official remote MCP server for Jira, Confluence, Jira Service Management, Bitbucket and Compass.Open sourceJavaScript · Apache-2.0Verified · Active 1.1kGitHub stars
Frequently asked
- What are the best JavaScript mcp servers?
- By maintained adoption — GitHub stars plus recent commit activity — firecrawl-mcp-server, browser-tools-mcp and Talk to Figma MCP (Grab) lead the JavaScript mcp servers in this index of 11. The full ranking is below; it reflects what is genuinely used and still maintained, not what pays.
- Are these JavaScript mcp servers open source and free?
- Yes — every project on this page is open source and written primarily in JavaScript. MIT is the most common licence here, on 9 of 11, across 2 licences in total. The software is free to run and self-host; you still pay for the infrastructure you run it on and any model or API usage it makes.
- Why choose JavaScript mcp servers specifically?
- Staying in your team's primary language — JavaScript — makes self-hosting, extending, and debugging far easier, because you can read and modify the source directly instead of treating it as a black box. It also makes upstream activity something you can judge: 9 of these 11 shipped in the last 90 days, and reading a quiet project's source is how you tell finished from abandoned.