Context7 MCP Server

by upstash Your server? Claim it

answering

Context7 is answering right now. Last checked 9 min ago. 1 053 239 installs a week from npm. It exposes 2 tools. Last commit 17 Sep 2026.

Up-to-date code docs for any prompt

Installs per day peak 397 850 · avg 138 733 · +118% w/w

a month agotoday

Uptime history 21 days of history

21 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

370 ms

Response time

average over 24h

1 053 239

Installs / week

npm and PyPI

What changed 4

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 4 September 2026. No other catalogue keeps this.

14 Sep a tool changed version

11 Sep a tool changed version

9 Sep a tool changed version

4 Sep a tool changed version

What the code does

We read the source, 19 h ago · tools taken from the live server · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Runs an external command packages/cli/src/commands/upgrade.ts:35, packages/cli/src/commands/generate.ts:439

    const child = spawn(command, args, {

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add context7 --transport http https://mcp.context7.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "context7": {
      "url": "https://mcp.context7.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.context7]
url = "https://mcp.context7.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "context7": {
      "url": "https://mcp.context7.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "context7": {
      "url": "https://mcp.context7.com/mcp"
    }
  }
}

This one needs environment variables set before it will start: CONTEXT7_API_KEY (API key for authentication). The author declared them in the registry entry; get the values from the project itself.

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

docs

query-docs

Retrieves and queries up-to-date documentation and code examples from Context7 for any programming library or framework. You must call 'Resolve Context7 Library ID' tool first to obtain the exact Context7-compatible library ID required to use this tool, UNLESS the user explicitly provides a library ID in the format '/org/project' or '/org/project/version' in their query. Do not call this tool more than 3 times per question.

resolve

resolve-library-id

Resolves a package/product name to a Context7-compatible library ID and returns matching libraries. You MUST call this function before 'Query Documentation' tool to obtain a valid Context7-compatible library ID UNLESS the user explicitly provides a library ID in the format '/org/project' or '/org/project/version' in their query. Each result includes: - Library ID: Context7-compatible identifier (format: /org/project) - Name: Library or package name - Description: Short summary - Code Snippets: Number of available code examples - Source Reputation: Authority indicator (High, Medium, Low, or Unknown) - Benchmark Score: Quality indicator (100 is the highest score) - Versions: List of versions if available. Use one of those versions if the user provides a version in their query. The format of the version is /org/project/version. For best results, select libraries based on name match, source reputation, snippet coverage, benchmark score, and relevance to your use case. Selection Process: 1. Analyze the query to understand what library/package the user is looking for 2. Return the most relevant match based on: - Name similarity to the query (exact matches prioritized) - Description relevance to the query's intent - Documentation coverage (prioritize libraries with higher Code Snippet counts) - Source reputation (consider libraries with High or Medium reputation more authoritative) - Benchmark Score: Quality indicator (100 is the highest score) Response Format: - Return the selected library ID in a clearly marked section - Provide a brief explanation for why this library was chosen - If multiple good matches exist, acknowledge this but proceed with the most relevant one - If no good matches exist, clearly state this and suggest query refinements For ambiguous queries, request clarification before proceeding with a best-guess match. IMPORTANT: Do not call this tool more than 3 times per question. If you cannot find what you need after 3 calls, use the best result you have.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.context7.com/mcp	streamable-http	answering	359 ms	9 min ago

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Context7 — questions

Answers built from our own checks of this server.

What can Context7 do?

It exposes 2 tools, read directly from the server on our last check. Among them: query-docs, resolve-library-id. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Context7 working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 370 ms. The bar chart above shows every period we have measured.

How do I connect Context7?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Context7 need an API key?

No. Context7 completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Context7?

It answers our handshake in 370 ms on average, which is faster than 42% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

How many people use Context7?

The npm package @upstash/context7-mcp was installed 1 053 239 times in the last week. Week over week that is +118%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Context7 open source?

Yes — it is published under the MIT licence, written in TypeScript, 62 142 stars on GitHub and 20 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.