context7-mcp

context7-mcp is a skill for Claude Code, Codex from myths-labs/muse. It costs 58 tokens per session (452 once invoked), scanned A, a copy of documentation-lookup, MIT.

A documentation lookup skill for software libraries, frameworks, and programming interfaces. It fetches current reference material and examples when answering related questions.

In plain words
What is it for?
Use it when configuring React, Vue, Next.js, Prisma, Supabase, or other libraries, or when requesting code examples and API details.
Why use it?
It reduces the chance of relying on outdated or incorrect training knowledge about changing software tools.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when configuring React, Vue, Next.js, Prisma, Supabase, or other libraries, or when requesting code examples and API details.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/myths-labs/muse/context7
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.

Any agent
npx skills add myths-labs/muse --skill context7
Clone the repo
git clone --depth 1 https://github.com/myths-labs/muse

Made for: Claude Code, Codex.

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-mcp

README.md
[![agentmods](https://agentmods.dev/badge/skills/myths-labs/muse/context7/github.svg)](https://agentmods.dev/skills/myths-labs/muse/context7)
Your own site
<a href="https://agentmods.dev/skills/myths-labs/muse/context7"><img src="https://agentmods.dev/badge/skills/myths-labs/muse/context7/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for context7-mcp

Your own site · 80×15
<a href="https://agentmods.dev/skills/myths-labs/muse/context7"><img src="https://agentmods.dev/badge/skills/myths-labs/muse/context7.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 452 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 97% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00058 $0.00452
Opus 5.5 $0.00023 $0.00181
Sonnet 5.5 $0.00012 $0.00090
Haiku 4.5 $0.00006 $0.00045

Measured 1mo ago against content hash 6f07fd4d6cbf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

context7-mcp 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 1mo ago.

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

97% identical to documentation-lookup — 2 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.

skills/toolkit/context7/SKILL.md · 54 lines

What it actually says

When the user asks about libraries, frameworks, or needs code examples, use Context7 to fetch current documentation instead of relying on training data.

When to Use This Skill

Activate this skill when the user:

  • Asks setup or configuration questions ("How do I configure Next.js middleware?")
  • Requests code involving libraries ("Write a Prisma query for...")
  • Needs API references ("What are the Supabase auth methods?")
  • Mentions specific frameworks (React, Vue, Svelte, Express, Tailwind, etc.)

How to Fetch Documentation

Step 1: Resolve the Library ID

Call resolve-library-id with:

  • libraryName: The library name extracted from the user's question
  • query: The user's full question (improves relevance ranking)

Step 2: Select the Best Match

From the resolution results, choose based on:

  • Exact or closest name match to what the user asked for
  • Higher benchmark scores indicate better documentation quality
  • If the user mentioned a version (e.g., "React 19"), prefer version-specific IDs

Step 3: Fetch the Documentation

Call query-docs with:

  • libraryId: The selected Context7 library ID (e.g., /vercel/next.js)
  • query: The user's specific question

Step 4: Use the Documentation

Incorporate the fetched documentation into your response:

  • Answer the user's question using current, accurate information
  • Include relevant code examples from the docs
  • Cite the library version when relevant

Guidelines

  • Be specific: Pass the user's full question as the query for better results
  • Version awareness: When users mention versions ("Next.js 15", "React 19"), use version-specific library IDs if available from the resolution step
  • Prefer official sources: When multiple matches exist, prefer official/primary packages over community forks
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. 1mo ago First seen · 54 lines · 58 tokens per session scan A 6f07fd4d6cbf

Subscribe to this mod's changes

context7-mcp is a skill published in the GitHub repository myths-labs/muse (37 stars, last pushed 4d ago), licensed MIT. It adds 58 tokens to every session and 452 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 97% identical to documentation-lookup, differing in 2 lines, and is treated as a copy.