Context7 MCP Server for Claude

Content

Context7 keeps Claude's answers aligned with the libraries you actually depend on. When you ask for help with a framework or package, the server resolves the library and pulls current, version-specific documentation and code examples straight into the prompt context. That reduces the common failure mode where a model answers from an outdated training snapshot and produces APIs that no longer exist. Add a short instruction like "use context7" to a prompt and Claude can ground its response in fresh docs.

Features

• Fetches up-to-date, version-specific documentation for popular libraries on demand.
• Resolves a free-form library name to a canonical documentation source before fetching.
• Returns focused documentation and code examples scoped to the topic you ask about.
• Reduces outdated or hallucinated APIs by grounding answers in current docs.
• Runs as a standard stdio MCP server that installs into Claude Code and Claude Desktop with one command.
• Works without an account; an optional API key raises rate limits.

Use Cases

• Get accurate, current usage for a library instead of relying on the model's training cutoff.
• Pull version-specific code examples while implementing a feature.
• Confirm the correct API surface for a fast-moving framework before writing code.
• Reduce time spent cross-checking official docs in a separate browser tab.
• Ground refactors and migrations in the documentation for the target version.

Installation

Claude Code

1. Make sure Node.js 18+ is installed (verify with npx --version).
2. Run: claude mcp add context7 -- npx -y @upstash/context7-mcp
3. Verify the server is registered: claude mcp list
4. Add "use context7" to a coding prompt to confirm docs are pulled in.

Claude Desktop

1. Open your Claude Desktop configuration file.
2. Add the Context7 server to the mcpServers section using the configuration below.
3. Restart Claude Desktop.
4. Confirm the server appears and ask a library question with "use context7".

Configuration

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

Examples

Ground an answer in current docs

Append a short instruction so Claude pulls fresh documentation.

"Show me how to define a route with the latest version of my web framework. use context7"

Resolve a specific library version

Ask for version-scoped guidance to avoid outdated APIs.

"Give me the current recommended client setup for this database library, version-specific. use context7"

Pull focused code examples

Request examples for a single topic rather than a broad overview.

"Fetch up-to-date examples for handling file uploads in this framework. use context7"

Security

• The server makes outbound network requests to the Context7 service; only the library names and topics you query are sent to resolve and fetch documentation.
• Returned documentation and code examples are third-party content, so review any snippet before running it in your environment.
• Do not embed secrets, tokens, or private identifiers in the library queries you pass to the server.
• If you configure an optional API key for higher rate limits, store it as an environment variable rather than committing it to source control.

Troubleshooting

npx cannot resolve the package

Verify Node.js 18+ and npx are installed (npx --version). Networks that block the npm registry will prevent npx -y @upstash/context7-mcp from resolving.

Documentation requests time out or return nothing

Confirm the machine has internet access to the Context7 service. Transient rate limiting can also cause empty responses; retry, and consider configuring an API key for higher limits.

Server not listed in Claude Code

Re-run claude mcp add context7 -- npx -y @upstash/context7-mcp, then claude mcp list. Confirm it was added to the scope (project versus user) you are running in.

Claude does not use Context7 automatically

Add an explicit instruction such as "use context7" to the prompt. The server provides documentation tools, but the model decides when to call them, so a nudge helps in ambiguous requests.

• Source repositorygithub.com 2026-07-18T11:38:32+00:00
• Documentationgithub.com
• Websitecontext7.com
• Submitted by glorydavid030232026-06-02