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context7

Use when you need up-to-date, version-specific library docs and real code examples pulled into the prompt — add 'use context7' so the agent stops guessing outdated APIs.

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---
name: context7
description: "Use when you need up-to-date, version-specific library docs and real code examples pulled into the prompt — add 'use context7' so the agent stops guessing outdated APIs."
source: https://github.com/upstash/context7
generated: 2026-07-23T01:35:07.886Z
category: tool
audience: engineers
---

## When to use

- Writing code against a fast-moving library where your model's training data is stale
- You keep getting hallucinated methods, wrong import paths, or APIs that no longer exist
- You want docs and examples for a specific version of a framework, not a generic average
- Wiring an MCP server into Claude Code, Cursor, or another agent to fetch live documentation on demand

## Key concepts

### 'use context7' prompt trigger

Appending the phrase 'use context7' to a prompt tells the MCP-enabled agent to fetch current, version-specific documentation and code snippets for the libraries mentioned, injecting them into context before answering.

### resolve-library-id then get-library-docs

Context7 exposes two MCP tools: resolve-library-id maps a package name to a Context7-compatible library ID, and get-library-docs pulls that library's docs (optionally scoped to a topic and token budget).

### Version-specific documentation

Rather than serving one blended snapshot, Context7 indexes docs per library version so the examples it returns match the exact release you are building against.

### Remote vs local MCP server

You can point an agent at the hosted endpoint https://mcp.context7.com/mcp or run the server locally via npx @upstash/context7-mcp — both expose the same tools; the remote endpoint needs no install.

## API reference

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

Register the hosted Context7 MCP server in Claude Code (no local install needed).

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

```
npx -y @upstash/context7-mcp
```

Run the Context7 MCP server locally over stdio.

```
npx -y @upstash/context7-mcp
```

```
resolve-library-id(libraryName)
```

Resolve a human package name (e.g. 'next.js') to a Context7-compatible library ID.

```
resolve-library-id({ libraryName: "next.js" })
```

```
get-library-docs(context7CompatibleLibraryID, topic?, tokens?)
```

Fetch up-to-date docs for a resolved library, optionally scoped to a topic and token budget.

```
get-library-docs({ context7CompatibleLibraryID: "/vercel/next.js", topic: "app router", tokens: 5000 })
```

## Gotchas

- You must add 'use context7' (or otherwise invoke the tools) — the server does not fire automatically on every prompt
- The library must be indexed by Context7; obscure or private packages may not resolve to an ID
- Higher token budgets pull more docs but eat into your context window — scope with a topic when you can
- It surfaces documentation, not your private codebase — pair it with repo-aware tooling for internal APIs

---
Generated by SkillMake from https://github.com/upstash/context7 on 2026-07-23T01:35:07.886Z.
Verify against source before relying on details.

File: ~/.claude/skills/context7/SKILL.md