Context7 是一个为 AI 编程助手提供实时文档的 MCP 服务与 CLI 工具。大模型往往依赖陈旧训练数据，容易给出过时示例或根本不存在的 API；Context7 会从源头抓取指定库、指定版本的文档和代码示例，直接注入到编码助手的上下文中。它支持两种使用方式：CLI + Skills 模式通过 ctx7 命令行取文档，无需 MCP；或注册 Context7 MCP 服务器，让助手原生调用解析库 ID、查询文档等工具。安装只需一条 npx 命令，可针对 Cursor、Claude Code、OpenCode 等客户端自动配置，并支持 API Key 提升速率限制。
npx ctx7 setupLLMs rely on outdated or generic information about the libraries you use. You get:
Context7 pulls up-to-date, version-specific documentation and code examples straight from the source — and gives them to your coding agent.
Create a Next.js proxy that checks for a valid JWT in cookies
and redirects unauthenticated users to `/login`. use context7
Configure a Cloudflare Worker script to cache
JSON API responses for five minutes. use context7
Show me the Supabase auth API for email/password sign-up.
Context7 fetches up-to-date code examples and documentation right into your coding agent's context. No tab-switching, no hallucinated APIs that don't exist, no outdated code generation.
Works in two modes:
ctx7 CLI commands (no MCP required)[!NOTE] API Key Recommended: Get a free API key at context7.com/dashboard for higher rate limits.
Set up Context7 for your coding agents with a single command. The ctx7 CLI requires Node.js 22.13 or newer.
npx ctx7 setup
Authenticates via OAuth, generates an API key, and installs the appropriate skill. You can choose between CLI + Skills or MCP mode. Use --cursor, --claude, or --opencode to target a specific agent.
To remove the generated setup later, run npx ctx7 remove. If you globally installed the CLI with npm install -g ctx7, remove that package separately with npm uninstall -g ctx7.
To configure manually, use the Context7 server URL https://mcp.context7.com/mcp with your MCP client and pass your API key via the Authorization: Bearer YOUR_API_KEY header. See the link below for client-specific setup instructions.
If you already know exactly which library you want to use, add its Context7 ID to your prompt. That way, Context7 can skip the library-matching step and directly retrieve docs.
Implement basic authentication with Supabase. use library /supabase/supabase for API and docs.
The slash syntax tells Context7 exactly which library to load docs for.
To get documentation for a specific library version, just mention the version in your prompt:
How do I set up a Next.js 16 proxy? use context7
Context7 will automatically match the appropriate version.
If you installed via ctx7 setup, a skill is configured automatically that triggers Context7 for library-related questions. To set up a rule manually instead, add one to your coding agent:
Cursor Settings > RulesCLAUDE.mdExample rule:
Always use Context7 when I need library/API documentation, code generation, setup or configuration steps without me having to explicitly ask.
ctx7 library : Searches the Context7 index by library name and returns matching libraries with their IDs.ctx7 docs : Retrieves documentation for a library using a Context7-compatible library ID (e.g., /mongodb/docs, /vercel/next.js).resolve-library-id: Resolves a general library name into a Context7-compatible library ID.
query (required): The user's question or task (used to rank results by relevance)libraryName (required): The name of the library to search forquery-docs: Retrieves documentation for a library using a Context7-compatible library ID.
libraryId (required): Exact Context7-compatible library ID (e.g., /mongodb/docs, /vercel/next.js)query (required): The question or task to get relevant documentation forlanguage (optional): The programming language you write in, used to rank code examples in that language first@upstash/context7-mcp - MCP serverctx7 - CLI@upstash/context7-sdk - TypeScript SDK@upstash/context7-tools-ai-sdk - Vercel AI SDK tools@upstash/context7-pi - pi.dev extension1- Context7 projects are community-contributed and while we strive to maintain high quality, we cannot guarantee the accuracy, completeness, or security of all library documentation. Projects listed in Context7 are developed and maintained by their respective owners, not by Context7. If you encounter any suspicious, inappropriate, or potentially harmful content, please use the "Report" button on the project page to notify us immediately. We take all reports seriously and will review flagged content promptly to maintain the integrity and safety of our platform. By using Context7, you acknowledge that you do so at your own discretion and risk.
2- This repository hosts the MCP server’s source code. The supporting components — API backend, parsing engine, and crawling engine — are private and not part of this repository.
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