Skip to content
Go back

Claude Using Outdated Library Documentation? Fix with Context7 MCP

BLUF

Problem: Claude makes wrong assumptions about library APIs from outdated training data.

Solution: Context7 MCP server loads live documentation directly into Claude’s context.

Setup:

Table of contents

Open Table of contents

The Problem: Claude Guessing Outdated APIs

You know the pattern: Claude confidently suggests code that should work, but doesn’t.

Yesterday, I was debugging a Structurizr configuration file (an architecture diagram tool) when I hit this exact problem:

Unexpected tokens at line 457: documentation {

Claude made three confident attempts, restructuring brackets each time. But no amount of bracket juggling would work—Structurizr’s entire documentation {} syntax had been deprecated for the !docs directive.

This isn’t a Structurizr problem. It’s the Stripe v2024 problem. The React 19 problem. The Terraform 1.5 problem. Libraries evolve faster than Claude’s training data.

How Context7 Solved It

Context7 is an MCP server that loads current documentation directly into Claude’s context. Not summaries or memories—the actual docs.

Before Context7: Guessing Game

Claude kept trying to restructure my documentation blocks, not knowing the syntax had completely changed:

  1. Attempt 1: “Move documentation block inside workspace” - Wrong, it was already inside
  2. Attempt 2: “Add missing closing brace for views block” - Still errored
  3. Attempt 3: “Fix the software system reference syntax” - Kept trying variations of the deprecated syntax

After Context7: Instant Fix

With Context7 loaded, Claude saw the real problem immediately:

❌ What I had (deprecated):
documentation {
  kinmelApp "README.md"
}

✅ What Structurizr now uses:
!docs docs

Setup (30 Seconds)

# Install
claude mcp add context7 npx -y @context7/mcp-server

# Verify
claude mcp list
# Should see: context7... ✓ Connected

Manual config option: Add to claude_desktop_config.json at:

When to Use Context7

Real Impact

My Structurizr session:

Pro tip: Combine with CLAUDE.md:

This pairs perfectly with strategic documentation control—CLAUDE.md keeps AI following your patterns, Context7 ensures it uses correct APIs.

Key Points


Share this post on:

Previous Post
Makefiles in 2025: The Build Tool That Refuses to Die
Next Post
I Run 4 AI Agents in Parallel. Here's How I Keep Them from Destroying My Codebase