context7

context7 is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from emersonjds/redbar. Its token cost is not measured, scanned A, a copy of context7, MIT.

A documentation lookup tool for coding agents. It fetches current library and framework documentation and code examples when needed.

In plain words
What is it for?
It is for checking how libraries and frameworks currently work while answering questions or writing code.
Why use it?
It reduces reliance on possibly outdated information from the model's training data.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Written for no agent in particular: it speaks MCP, so any client can run it. Also seen: listed in a Claude config.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/emersonjds/redbar/context7
Clone the repo
git clone --depth 1 https://github.com/emersonjds/redbar

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for context7

README.md
[![agentmods](https://agentmods.dev/badge/mcp/emersonjds/redbar/context7.svg)](https://agentmods.dev/mcp/emersonjds/redbar/context7)
Your own site
<a href="https://agentmods.dev/mcp/emersonjds/redbar/context7"><img src="https://agentmods.dev/badge/mcp/emersonjds/redbar/context7.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin 67% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

context7 scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

67% identical to context7 — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.mcp.json · 11 lines

What it actually says

{
  "context7": {
    "type": "stdio",
    "command": "npx",
    "args": [
      "-y",
      "@upstash/context7-mcp"
    ],
    "env": {}
  }
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 11 lines scan A 3b7720e96b6f

Subscribe to this mod's changes

context7 is an MCP server published in the GitHub repository emersonjds/redbar (6 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. It is 67% identical to context7, differing in 6 lines, and is treated as a copy.