Context7 and its tool Context7 MCP is so popular in AI-Vibe Coding world, nowadays. I want to mention it and create an article about it.

Context7 MCP is a tool that supercharges AI prompts with real-time, version-specific documentation and code examples. Whether you're using Claude, Cursor, VS Code, or another Model Context Protocol (MCP) client, Context7 helps eliminate hallucinated APIs and outdated examples by injecting live data into your LLM interactions.

We can see their popularity on github star graphics:

Star History Chart

🌟 Why Use Context7?

❌ Without Context7:

  • Outdated examples based on old training data.
  • AI hallucinations about APIs that don’t exist.
  • Generalized help for outdated package versions.

✅ With Context7:

  • Accurate, live documentation and examples pulled from the actual library.
  • Instant, relevant answers based on real packages and versions.
  • All you have to do is add use context7 to your prompt.

Examples: 

Create a basic Next.js project with app router. use context7
Create a script to delete the rows where the city is "" given PostgreSQL credentials. use context7

🛠️ Getting Started

Requirements

  • Node.js ≥ v18.0.0
  • One of the following MCP clients:
    • Cursor
    • Windsurf
    • Claude Desktop
    • VS Code
    • Docker (optional)

📦 Installation Methods

1. Install via Smithery (for Claude Desktop) 

npx -y @smithery/cli install @upstash/context7-mcp --client claude

🧭 Installation for Specific Clients

📍 Cursor

Steps:

  1. Go to: Settings → Cursor Settings → MCP → Add new global MCP server
  2. Or directly update ~/.cursor/mcp.json: 
{
  "mcpServers": {
    "context7": {
      "command": "npx",
      "args": ["-y", "@upstash/context7-mcp@latest"]
    }
  }
}

Alternative Runtimes:

Using Bun

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

Using Deno

{
  "mcpServers": {
    "context7": {
      "command": "deno",
      "args": ["run", "--allow-net", "npm:@upstash/context7-mcp"]
    }
  }
}

🌊 Windsurf

Add to your windsurf.mcp.json:

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

🧩 VS Code / VS Code Insiders

Install via VS Code MCP Docs

{
  "servers": {
    "Context7": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@upstash/context7-mcp@latest"]
    }
  }
}

Install buttons:

🧠 Claude Code 

claude mcp add context7 -- npx -y @upstash/context7-mcp@latest

💻 Claude Desktop

Update claude_desktop_config.json:

{
  "mcpServers": {
    "Context7": {
      "command": "npx",
      "args": ["-y", "@upstash/context7-mcp@latest"]
    }
  }
}

🐳 Using Docker

1. Dockerfile

Create a file named Dockerfile:

FROM node:18-alpine

WORKDIR /app

RUN npm install -g @upstash/context7-mcp@latest

CMD ["context7-mcp"]

2. Build the Docker Image 

docker build -t context7-mcp .

3. Configure MCP Client

Example client_mcp_settings.json:

{
  "mcpServers": {
    "Context7": {
      "autoApprove": [],
      "disabled": false,
      "timeout": 60,
      "command": "docker",
      "args": ["run", "-i", "--rm", "context7-mcp"],
      "transportType": "stdio"
    }
  }
}

Note: The tag context7-mcp should match your docker build tag.

🧰 Available Tools

resolve-library-id

Resolves a general library name into a Context7-compatible ID.

  • libraryName (required)

get-library-docs

Fetch docs using Context7 ID.

  • context7CompatibleLibraryID (required)
  • topic (optional): e.g., "routing", "hooks"
  • tokens (optional, default 5000)

⚙️ Development

Clone the repo and install dependencies:

bun i

Build the project:

bun run build

Local config example:

{
  "mcpServers": {
    "context7": {
      "command": "npx",
      "args": ["tsx", "/path/to/folder/context7-mcp/src/index.ts"]
    }
  }
}

🔬 Test with MCP Inspector 

npx -y @modelcontextprotocol/inspector npx @upstash/context7-mcp@latest

🧯 Context7 Troubleshooting

ERR_MODULE_NOT_FOUND?

Switch from npx to bunx:

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

Context7 MCP Errors?

  1. Remove @latest from package name.
  2. Try bunx.
  3. Try deno.