Vercel · Codex

Add the Next.js DevTools MCP server to Codex

Gives coding agents Next.js docs, runtime errors and upgrade helpers for your app.

Official serverLocalDeveloper tools

1. Add the server

Run in your terminal

# ~/.codex/config.toml
[mcp_servers.next_devtools]
command = "npx"
args = ["-y", "next-devtools-mcp"]

2. Sign in

Run codex mcp login <name> to complete OAuth for a remote server. Next.js DevTools runs locally; set any credentials Vercel asks for before starting Codex.

3. Try it

Ask Codex for something Next.js DevTools can do. Gives coding agents Next.js docs, runtime errors and upgrade helpers for your app. Approve the first tool call and check the result before allowing write actions automatically.

· Each server is a [mcp_servers.<name>] table in config.toml.
· Use enabled_tools or disabled_tools to keep the tool list short.

FAQ

How do I add the Next.js DevTools MCP server to Codex?: Run: # ~/.codex/config.toml …. Run codex mcp login <name> to complete OAuth for a remote server.
Is this the official Next.js DevTools MCP server?: Yes. It is published by Vercel as io.github.vercel/next-devtools-mcp in the official MCP registry.
Does the Next.js DevTools MCP server need an API key?: It runs locally from a package. See Vercel's docs for any credentials it needs.

Links

Vercel MCP docs Codex MCP docs Next.js DevTools server details

Next.js DevTools in other clients

Claude Code Gemini CLI Cursor VS Code (GitHub Copilot)

More developer tools for Codex

Azure Cloudflare GitHub GitLab Postman Sentry Vercel

Work at Vercel?

Feature Next.js DevTools across the directory and its category from $49/month.

Feature this server

Reviewed Oct 5, 2026. Command generated from the registry record and checked against Codex's documented syntax.