Developer platforms - official Vercel server
Next.js DevTools MCP server
A local stdio MCP server that discovers running Next.js 16+ dev servers and proxies their built-in /_next/mcp endpoint, so agents can read live errors, routes and logs. It also points agents at version-matched bundled docs and the agent-browser CLI. It runs locally from next-devtools-mcp (npm) and needs no auth.
Last verified 3 tools3 sources
Install
Claude Code
About Claude Codeclaude mcp add next-devtools npx next-devtools-mcp@latestCodex
About Codexcodex mcp add next-devtools -- npx next-devtools-mcp@latestVS Code
code --add-mcp '{"name":"next-devtools","command":"npx","args":["-y","next-devtools-mcp@latest"]}'Generic
{
"mcpServers": {
"next-devtools": {
"command": "npx",
"args": ["-y", "next-devtools-mcp@latest"]
}
}
}Tools
nextjs_index- Discover running Next.js dev servers and list each one's runtime MCP tools.
nextjs_call- Call a runtime tool on a discovered server (errors, routes, logs, Server Actions).
nextjs_docs- Gateway that points the agent at version-accurate docs in node_modules/next/dist/docs/.
As documented on October 17, 2026. A running server reports its current list through tools/list.
Notes and caveats
- Requires Node.js v20.19+ and a running Next.js 16+ dev server for nextjs_index and nextjs_call.
- Version 0.4.0 turned it into a thin connector: the init, upgrade_nextjs_16 and enable_cache_components tools and the docs resources were removed (now agent skills or bundled docs).
- Cursor setup is a one-click install link or reusing the generic JSON config.
- Collects anonymous usage telemetry; opt out with NEXT_TELEMETRY_DISABLED=1.
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Related reading
- Agent Plugins 1.0.0: One Package Format for Agent Skills and MCP ServersAgent Plugins 1.0.0 is an open standard that packages Agent Skills and MCP servers into one plugin, with ChatGPT, Codex, Cursor and Copilot support at launch.
- Vercel MCP Ships the 2026-07-28 Spec: The MCP Migration Clock StartsVercel MCP now serves the stateless 2026-07-28 spec and the 2025 protocol from one endpoint via mcp-handler 2.x. What it means for server authors and clients.
- Composio 101: Give Your AI Agent Access to 500+ AppsComposio connects AI agents to Gmail, GitHub, Slack and hundreds more apps with auth handled for you. How to set it up and build real cross-app workflows.
- Human-in-the-Loop Patterns for AI Agents: Approvals in 5 SDKsHow LangGraph, Mastra, the AI SDK, OpenAI Agents SDK and Claude Agent SDK pause agent tool calls for approval, with verified code for all five.
- Streaming and Generative UI for Agent Apps: AI SDK 7, AG-UI 1.0, Mastra and LangGraphStream tokens, tool calls and UI parts from agents: AI SDK 7 UI message streams, resumable streams, AG-UI 1.0 events, and Mastra and LangGraph.
- What's New in Vercel AI SDK 7 (October 2026): Harnesses, Tool Search, RetriesVercel AI SDK is at 7.0.143. What changed since June: 10 harness adapters, tool search, toolCallConcurrency, streamRetries and WebSocket chat.
FAQ
What does the Next.js DevTools MCP server do?
A local stdio MCP server that discovers running Next.js 16+ dev servers and proxies their built-in /_next/mcp endpoint, so agents can read live errors, routes and logs. It also points agents at version-matched bundled docs and the agent-browser CLI. The vendor documents 3 tools, including nextjs_index, nextjs_call and nextjs_docs.
How do I add the Next.js DevTools MCP server to Claude Code?
Run claude mcp add next-devtools npx next-devtools-mcp@latest, copied from Vercel's docs. This page also has snippets for Codex, VS Code and Generic.
Does the Next.js DevTools MCP server need authentication?
No. The vendor documents it as needing no auth. Transport: stdio. Status: Unlabelled, last checked October 17, 2026.
Sources
Last verified against 3 Vercel pages, then re-checked independently.
- github.comhttps://github.com/vercel/next-devtools-mcp
- raw.githubusercontent.comhttps://raw.githubusercontent.com/vercel/next-devtools-mcp/main/README.md
- npmjs.comhttps://www.npmjs.com/package/next-devtools-mcp
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