AI Frameworks · upstash

context7

Context7 is an MCP server and CLI tool that injects up-to-date, version-specific library documentation and code examples directly into LLM prompts, eliminating hallucinated APIs and outdated code generation. It integrates with Cursor, Claude, and other AI coding assistants to provide real-time documentation retrieval without tab-switching.

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Source: GitHub — github.com/upstash/context7

58.7k

GitHub stars

2.8k

Forks

TypeScript

Primary language

MIT

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	upstash/context7
Owner	upstash
Primary language	TypeScript
License	MIT — OSI-approved
Stars	58.7k
Forks	2.8k
Open issues	35
Latest release	[email protected] (2026-07-06)
Last updated	2026-07-07
Source	https://github.com/upstash/context7

What context7 is

A TypeScript-based MCP server that exposes `resolve-library-id` and `query-docs` tools to fetch live documentation from a proprietary backend (parsing, crawling, API layers are private). Operates in two modes: CLI with agent skills or native MCP registration. Requires Node.js 18+ and optional API key authentication for higher rate limits.

Quickstart

Get the context7 source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/upstash/context7.git2cd context73# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

AI-assisted code generation with library-specific context

Cursor, Claude, and other code editors can now generate accurate, version-aware code by retrieving live documentation mid-prompt without user intervention.

Reducing LLM hallucination for third-party APIs

Developers building with modern libraries (Next.js, Supabase, MongoDB, Cloudflare Workers) avoid stale training data and non-existent API signatures.

Cross-library onboarding and setup automation

Teams can use Context7 rules to automatically inject relevant docs for authentication, middleware, database configuration, and deployment without explicit prompting.

Implementation considerations

API key recommended but not required; free tier exists but rate limits are higher with auth—obtain a free key at context7.com/dashboard early.
Install via `npx ctx7 setup` for OAuth-based key generation and automatic agent integration; manual setup requires passing CONTEXT7_API_KEY header if using non-standard MCP clients.
Library resolution requires exact library IDs (e.g., `/mongodb/docs`, `/vercel/next.js`) for optimal performance; use `ctx7 library <name> <query>` to discover IDs before committing to rules.
Latency depends on documentation crawl freshness and Context7 backend indexing; version-specific docs must be available in the source repository to be retrieved.
Agent rules (Cursor Rules, CLAUDE.md, etc.) should be configured to trigger Context7 automatically for library/API questions to maximize benefit without explicit prompting.

When to avoid it — and what to weigh

Offline-only or air-gapped environments — Context7 requires real-time calls to https://mcp.context7.com/mcp; local caching or offline operation is not mentioned.
Closed-source or proprietary library documentation — Context7 crawls and indexes public repositories and documentation; private or internally-hosted libraries require manual submission and are not automatically supported.
High-volume, cost-sensitive LLM deployments — Each documentation query adds latency and external API calls; billing model (free tier vs. paid) is not detailed; rate limits depend on API key availability.
Non-Node.js environments or minimal runtime overhead — CLI requires Node.js 18+; MCP server incurs network round-trips and potential blocking on documentation retrieval.

License & commercial use

Licensed under MIT (MIT License), a permissive OSI-approved license permitting commercial use, modification, and distribution with attribution.

MIT license permits commercial use without restriction. However, the README notes that supporting components (API backend, parsing engine, crawling engine) are private and not included in this repository. Commercial use of the MCP server itself (source code in this repo) is permitted under MIT; any commercial reliance on the backend service (context7.com) requires review of their terms of service and SLA.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Strong
License clarity	Clear
Deployment complexity	Low
DEV.co fit	Strong
Assessment confidence	High

Security considerations

Context7 requires sending API key over HTTPS headers and queries to mcp.context7.com. Authentication via OAuth for initial setup. No information provided on encryption, data retention, or security audits of the backend service. API key should be treated as a secret (environment variable, not hardcoded). Disclaimer states community-contributed library projects; no vetting details disclosed. Review context7.com's privacy policy and SLA before handling sensitive code contexts.

Alternatives to consider

GitHub Copilot + documentation tabs

Integrated into VS Code and JetBrains; does not require CLI setup or third-party MCP server. However, relies on static training data and does not fetch live docs.

Local LLM + retrieval-augmented generation (RAG) frameworks

Langchain, LlamaIndex, or custom vector stores enable offline doc indexing and querying. Higher operational overhead but no external API dependency.

Native IDE documentation plugins (e.g., DevDocs, Zeal)

Lightweight, local documentation browsers integrated into editors. Manual invocation and limited LLM integration compared to Context7.

Software development agency

Build on context7 with DEV.co software developers

Run `npx ctx7 setup` to authenticate, generate your free API key, and integrate with Cursor or Claude in seconds. No credit card required.

Talk to DEV.co

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context7 FAQ

Is Context7 free to use?

Yes, a free tier exists without an API key, but rate limits are lower. Signing up for a free API key at context7.com/dashboard raises limits and is recommended.

Can I use Context7 offline?

No. Context7 requires live HTTP calls to mcp.context7.com to fetch documentation. Offline or air-gapped environments are not supported.

Which AI coding assistants does Context7 support?

Official support for Cursor, Claude, and OpenCode. Manual MCP setup available for 30+ other MCP-compatible clients (list at context7.com/docs/resources/all-clients).

How do I add a private or internal library to Context7?

Context7 currently indexes public repositories. Private libraries are not automatically supported; you would need to submit them via context7.com/docs/adding-libraries or run Context7 MCP locally with custom integrations.

Software development & web development with DEV.co

Adopting context7 is usually one piece of a larger software development effort. As a software development agency, DEV.co provides software development services and web development expertise — pairing senior software developers and web developers with your team to design, build, and operate ai frameworks software in production.

Get Started with Context7

Run `npx ctx7 setup` to authenticate, generate your free API key, and integrate with Cursor or Claude in seconds. No credit card required.

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