6 Best MCP Servers for Coding Agents (2026 Compared)
Last updated 2026-10-01
Quick answer
Start with GitHub for repository access and Fetch for pulling current documentation pages on demand — those two fix the most common agent failures. Add Firefox DevTools if you build web UIs, Git for safe repository operations, Browser Use for end-to-end UI checks, and Filesystem only when you understand its scope rules.
How we picked
Coding agents fail in predictable ways: stale documentation, no access to the repo, inability to see the running app, and losing the plan mid-task. We compared servers that address those failures, are published by the platform vendor or a well-known maintainer, and install cleanly with npx or uvx. Community popularity in the registry and how actively versions ship were tiebreakers.
Quick comparison
One line per server:
- ▸GitHub — repos, issues, pull requests, code search and notifications via MCP.
- ▸Git — local repository operations and history with gated stage/commit.
- ▸Firefox DevTools — Mozilla's server: attach to a live tab, read console errors, take screenshots.
- ▸Browser Use — drive a real Chrome browser for end-to-end UI checks.
- ▸Fetch — pull the current documentation page for any library on demand.
- ▸Filesystem — scoped local file access for codebase navigation and edits.
Why documentation access matters most
The single biggest accuracy win for a coding agent is fresh documentation. Models trained months ago confidently call APIs that were renamed or removed. A fetch server closes most of that gap: point it at the library's current docs page and the agent reads the real function signature instead of inventing one. Teams report this one change removes a large share of 'looks right but does not compile' output.
The second win is observability. When the agent can open your app in a real browser via a DevTools server and read actual console errors, the debug loop closes without you copy-pasting stack traces into chat.
Safety notes
GitHub and Git servers can write to your repositories. Start with read-only scopes, keep the human in the loop for merges and pushes, and never grant a server broader org permissions than the task needs. Filesystem access is scoped to the directories you pass at launch — pass only the project directory, not your home folder. The MCP security guide covers the full checklist.
The picks, one by one
GitHub via MCP: search, repos, issues, PRs, files and notifications, with OAuth device flow or token auth.
Best for: Agents that need to browse, triage or edit GitHub projects.
Watch out: Powerful write tools — use a fine-grained token with minimal scopes.
Local Git operations: status, diffs, history, branches and gated stage/commit. Pure-JS, no shell-out.
Best for: Agents working inside a checked-out repository.
Watch out: Understands nothing about remote auth — pair with a GitHub server for remote work.
Mozilla's bridge to a live Firefox tab: console, network, screenshots, performance profiling.
Best for: Frontend debugging and verifying UI changes visually.
Watch out: Runs a local browser automation session; keep it on your dev machine.
Fetches any documentation page and converts it to clean markdown, with SSRF protection built in.
Best for: Grounding the agent in current docs instead of training-data memories.
Watch out: You point it at URLs — it does not search by itself.
Sandboxed local file access with document parsing: read, write and search inside directories you allow.
Best for: Codebase navigation and edits outside a Git server's reach.
Watch out: Explicitly allow-list directories at launch; never expose your whole drive.
Frequently asked questions
What is the first MCP server a coding agent should have?＋
A GitHub server (repository access) plus a fetch server (current docs pages) cover the two most common failure modes: no repo visibility and hallucinated APIs. Add Firefox DevTools next if you build web UIs.
Do these work in Cursor and VS Code as well as Claude Desktop?＋
Yes. All six install with npx and appear in any MCP-compatible client — Claude Desktop, Cursor, VS Code, Windsurf or custom agents.
Can an MCP server push code for me?＋
The Git and GitHub servers can stage, commit, branch and open pull requests. Keep the agent read-only until you trust it, and always review diffs before merge.