Context7

Pulls current, version-specific library docs into the conversation.

Started in our test
★ 63.7K GitHub stars
440.9K downloads a week
Last commit 26 Oct 2026

At a glance

Models learn a library at one moment in time and then keep using that version. Context7 looks up the library you are working with and returns current documentation and examples, so the code you get matches the version you have installed.

It has two tools: one turns a library name into a Context7 ID, the other fetches docs for that ID, optionally narrowed to a topic.

Made by: Upstash
Licence: MIT
Latest version: 4.4.4 (19 Oct 2026)
npm package: @upstash/context7-mcp
GitHub stars: 63.7K
Downloads: 440.9K a week
Last commit: 26 Oct 2026
Tools: 2
Runs on: Your computer or hosted

Our check: We ran this exact config on 26 Oct 2026: it started and answered with 2 tools.

What's in the pod: its tools

We found 2 tools when we started it on 26 Oct 2026. Every one of them only reads, so nothing changes unless you act on what it finds.

Only reads2 tools · Looks things up and changes nothing.

Tool	What it is for
`query-docs`	Pulls the current docs and code samples for one library, ranked against your question and, if you say, your language.
`resolve-library-id`	Turns a plain library name like "next.js" into the Context7 id that query-docs needs.

Grouped and described by us. The README on GitHub lists the inputs each tool takes.

Set it up

Pick your app for the exact snippet and where it goes.

Where it goes: claude_desktop_config.json (Settings → Developer → Edit Config)

Claude Desktop

{
  "mcpServers": {
    "context7": {
      "command": "npx",
      "args": [
        "-y",
        "@upstash/context7-mcp"
      ]
    }
  }
}

Where it goes: Your terminal, in the project folder

Claude Code

claude mcp add-json context7 '{"command":"npx","args":["-y","@upstash/context7-mcp"]}'

Where it goes: ~/.cursor/mcp.json, or .cursor/mcp.json in a project

Cursor

{
  "mcpServers": {
    "context7": {
      "command": "npx",
      "args": [
        "-y",
        "@upstash/context7-mcp"
      ]
    }
  }
}

Where it goes: .vscode/mcp.json in your project

VS Code

{
  "servers": {
    "context7": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@upstash/context7-mcp"
      ]
    }
  }
}

Where it goes: ~/.codeium/windsurf/mcp_config.json

Windsurf

{
  "mcpServers": {
    "context7": {
      "command": "npx",
      "args": [
        "-y",
        "@upstash/context7-mcp"
      ]
    }
  }
}

Remote option

Upstash also runs it as a remote server, which is the easy route for ChatGPT and other clients that only take a URL.

Server URL

https://mcp.context7.com/mcp

New to this? See the setup guides for Claude Code, Cursor, Claude Desktop and ChatGPT.

Settings

Names are exactly as the project spells them. Required ones are marked.

Setting	What it does
`https://mcp.context7.com/mcp`Config	The hosted server address. Point any client that supports remote servers here and nothing runs on your machine.
`Authorization: Bearer`Config	Header carrying your Context7 API key when you use the hosted address. Optional, but it lifts the rate limit.`Authorization: Bearer ctx7sk-xxxx`
`--api-key`Command line flag	Your API key when you run the npm package locally instead.`--api-key ctx7sk-xxxx`
`CONTEXT7_API_KEY`Environment variable	The same key set through the environment for the local package.

What it can touch

It can read

Context7's public index of library docs, fetched over the internet
Only the question text you send, not your code

It can change

Nothing on your machine or in your project

Safer setup: It is read-only already. If you prefer not to send queries to a third party, keep it out of projects that discuss private code names.

Before you start

Node.js 18 or newer for the local server
A free Context7 API key for higher rate limits (optional)

If it does not work

Rate limit or 429 errors: Get a free key from the Context7 dashboard and add it as the Bearer header or --api-key.
The agent never calls Context7: Add "use context7" to your prompt, or add a standing rule in CLAUDE.md or Cursor rules telling it to fetch docs for any library question.
It picks the wrong library: Name the id yourself with slash syntax, for example /vercel/next.js, so the lookup step is skipped.
npx ctx7 setup fails: The CLI needs Node.js 22.13 or newer. Check node --version and upgrade.

Peas in a pod: similar servers

How Context7 lines up against other developer tools servers on the shelf.

Server	Tools	Runs on	Licence	Stars
Context7	2	Your computer or hosted	MIT	63.7K
GitHub	46	Hosted	–	34K
MCP Inspector	–	Your computer	–	11.2K
XcodeBuildMCP	24	Your computer	MIT	6.5K
Peekaboo	3	Your computer	MIT	5.4K