# Best JavaScript mcp servers

> The open-source mcp servers written in JavaScript in this index, ranked by real maintained adoption (GitHub stars and recent commit activity), never by sponsorship. 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.

11 open-source records, ranked by maintained GitHub adoption; sponsorship never affects the ranking. Browse on the web: https://agentsearchengine.app/best/javascript-mcp-servers

## Ranked

1. [firecrawl-mcp-server](https://agentsearchengine.app/agents/firecrawl-mcp-server) — Official Firecrawl MCP Server - Adds powerful web scraping and search to Cursor, Claude and any other LLM clients. · Open source · MCP server · 7.5k★ · JavaScript · MIT · active today · best for adding web scraping and search to an mcp client, with scrape, search and parse usable on a rate-limited keyless tier
2. [browser-tools-mcp](https://agentsearchengine.app/agents/browser-tools-mcp) — Monitor browser logs directly from Cursor and other MCP compatible IDEs. · Open source · MCP server · 7.3k★ · JavaScript · MIT · active 1 month ago · best for debugging a web application from an mcp-compatible editor, capturing browser logs and screenshots plus lighthouse seo, performance, accessibility and best-practice audits
3. [Talk to Figma MCP (Grab)](https://agentsearchengine.app/agents/talk-to-figma-mcp) — Let Cursor, Claude Code or Codex read and modify Figma designs through a plugin and WebSocket bridge. · Open source · MCP server · 7.0k★ · JavaScript · MIT · active 1 month ago · best for automating repetitive design edits in figma from an ai agent
4. [Godot MCP](https://agentsearchengine.app/agents/godot-mcp) — Launch the Godot editor, run projects and read debug output from an AI assistant. · Open source · MCP server · 5.8k★ · JavaScript · MIT · active 5 months ago · best for godot developers using an ai coding agent who want it to run the game and read the errors itself
5. [draw.io MCP Server](https://agentsearchengine.app/agents/drawio-mcp) — The official draw.io MCP server: create diagrams inline in chat or open them in the draw.io editor. · Open source · MCP server · 5.5k★ · JavaScript · Apache-2.0 · active today · best for producing editable architecture and flow diagrams from a conversation
6. [deep-research](https://agentsearchengine.app/agents/deep-research) — Use any LLMs (Large Language Models) for Deep Research. Support SSE API and MCP server. · Open source · MCP server · 4.7k★ · JavaScript · MIT · active 3 months ago · best for generating in-depth research reports with a model provider you choose, where data is processed and stored locally
7. [MCP Feedback Enhanced](https://agentsearchengine.app/agents/mcp-feedback-enhanced) — Pause an AI coding agent to collect your feedback in a web UI or desktop app before it finishes. · Open source · MCP server · 3.8k★ · JavaScript · MIT · active 16 days ago · best for keeping a human checkpoint in long agent sessions so fewer requests are spent on wrong turns
8. [Bright Data MCP](https://agentsearchengine.app/agents/brightdata-mcp) — Web search, scraping with unblocking, structured extraction and browser automation for AI agents. · Open source · MCP server · 2.7k★ · JavaScript · MIT · active 5 days ago · best for agents that must reliably fetch public pages that block ordinary scrapers
9. [iOS Simulator MCP Server](https://agentsearchengine.app/agents/ios-simulator-mcp) — Let AI assistants inspect and drive the iOS Simulator: tap, type, swipe and read the UI. · Open source · MCP server · 2.2k★ · JavaScript · MIT · active 1 month ago · best for ios developers who want a coding agent to verify ui changes in the simulator
10. [MCP Server for MySQL](https://agentsearchengine.app/agents/mcp-server-mysql) — Let Claude and other LLMs inspect MySQL schemas and run queries, read-only unless you opt in to writes. · Open source · MCP server · 2.1k★ · JavaScript · MIT · active 1 month ago · best for letting an assistant explore and query a mysql database safely, with writes off by default
11. [Atlassian Rovo MCP Server](https://agentsearchengine.app/agents/atlassian-mcp-server) — Atlassian's official remote MCP server for Jira, Confluence, Jira Service Management, Bitbucket and Compass. · Open source · MCP server · 1.1k★ · JavaScript · Apache-2.0 · active 7 days ago · best for teams on atlassian cloud who want assistants to search, summarize and update jira issues and confluence pages

## FAQ

**What are the best JavaScript mcp servers?**
The JavaScript projects listed below, ranked by maintained adoption — GitHub stars plus recent commit activity — so you see what's genuinely used and still maintained, not abandoned.

**Are these JavaScript mcp servers open source and free?**
Yes — every project on this page is open source and written primarily in JavaScript. 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.

---
Source: [Agent Search Engine](https://agentsearchengine.app) — https://agentsearchengine.app/best/javascript-mcp-servers