Context7 MCP

Name: Context7 MCP Review
Item: Context7 MCP
Rating: 4.2
Author: Aaron Matthews

Connector Development Solid

Injects current, version-specific library documentation into Claude's context on demand. 51K+ stars, free with optional API key for higher rate limits. Two tools: resolve-library-id and query-docs. Eliminates hallucinated APIs.

Get accurate, up-to-date coding docs instead of outdated guesses
Look up the correct way to use any software library instantly
Avoid errors caused by Claude suggesting features that no longer exist

51,716 starsMIT (commercial OK)FreeNo code needed

Why it matters

51K stars. Solves the #1 Claude coding problem: hallucinated API calls from outdated training data. Grounds responses in real, current documentation.

Best for

Any developer using Claude for coding. Especially valuable when working with fast-changing libraries (React, Next.js, etc.).

Works in

Claude Code Claude Cowork Claude Chat

Source

https://www.npmjs.com/package/@upstash/context7-mcp

By Upstash

How to Get It

Option 1: Claude Desktop AppOpen the Customize panel in the sidebar → browse connectors → search and add. Works in Claude Code, Claude Cowork, and Claude Chat.

Option 2: Paste into Claude CodeCopy the command below and paste it into a Claude Code conversation. Claude will run it for you.

Command

claude mcp add context7 -- npx -y @upstash/context7-mcp

Tip: Paste this into a Claude Code conversation. Verify command matches your Claude Code version.

PrerequisitesNone required for basic usageTime to functional5 minutesCostFree

Trust Signals Source Reviewed

Stars51,716Contributors118Last updated2026-04-03LicenseMIT (OK for commercial use)Weekly downloads652,658Known CVEsNone found

Data & Access

Data processingPrompts sent to Anthropic API. Enterprise/Team plans exclude training.Connects toUpstash servers (official integration)

Community Pulse Active

Discussed on Hacker News, Reddit

I spent 3 weeks building my "dream MCP setup" and honestly, most of it was usele — Reddit · 695 pts
My 5 most useful MCP servers — Reddit · 468 pts
I've built and tested over 40 MCP servers - here's my vetting process and the 13 — Reddit · 358 pts

8 mentions across 2 sources

Reviewer notes

Source Reviewed review. These are observations, not a security certification.

2.4M monthly downloads — among most downloaded MCP servers in ecosystem. v2.1.6, actively maintained. No API key required for basic use. Completely universal — any developer using any library benefits. Low setup friction. Main risk is external service dependency on Context7's hosted service.

Read-only access to public documentation — extremely low permission surface. No credentials required beyond optional API token. Dependencies: undici (HTTP), jose (JWT). Upstash is mid-size cloud vendor with good track record.

2026-04-02: LIMITATION: Coverage depends on which libraries Context7 has indexed — obscure or private packages return nothing. Rate-limited without an API key.

How to evaluate tools before deploying →

Data shown here comes from public APIs and automated scanning. Reviewer notes reflect one person's experience. This is not a security certification or legal recommendation. Always evaluate tools according to your own organization's policies.

Evaluation Scores

Evaluation

Ease of Use

4/5

Versatility

5/5

Reliability

4/5

Security

4/5

Overall score4.25 / 5.00 SolidEvaluatedMar 2026

2.4M monthly downloads — among most downloaded MCP servers in ecosystem. v2.1.6, actively maintained. No API key required for basic use. Completely universal — any developer using any library benefits. Low setup friction. Main risk is external service dependency on Context7's hosted service.

← Back to Claude Tool Reviews