Claude Code Installation and Usage Guide
Claude Code is a powerful AI programming assistant that allows you to collaborate with AI directly in your terminal. This guide will walk you through the installation and configuration process.📋 System Requirements#
Supported operating systems: macOS, Linux, Windows (WSL)
🚀 Quick Start#
1. Install Node.js#
💡 Tip: If you already have Node.js 18.0 or higher installed, you can skip this step.
Ubuntu / Debian Users#
macOS Users#
2. Install Claude Code#
Install Claude Code globally using npm:You need to prepare two important configuration items:| Configuration | Description | How to Obtain |
|---|
| ANTHROPIC_AUTH_TOKEN | API authentication token | After registration, click Add Token on the API Tokens page (starts with sk-) |
| ANTHROPIC_BASE_URL | API service address | Use https://crazyrouter.com/ (same as the main site address) |
📝 Recommended settings when creating a token:Name: Any name you prefer
Group: Select Claude Code dedicated or Official Claude 3 and above
Other options: Keep default settings
Launch Claude Code#
Run in your project directory:First Run Configuration#
After launching, you will see the following configuration steps:1.
Select Theme → Choose your preferred theme + Press Enter
2.
Safety Notice → Confirm safety notice + Press Enter
3.
Terminal Configuration → Use default configuration + Press Enter
4.
Working Directory Trust → Trust current directory + Press Enter
❓ FAQ#
Q: Getting "Invalid API Key · Please run /login" error?#
A: This indicates Claude Code didn't detect the environment variables. Please check:Whether ANTHROPIC_AUTH_TOKEN and ANTHROPIC_BASE_URL are set correctly
Whether environment variable values are correct (token starts with sk-)
If using permanent configuration, whether you restarted the terminal
Q: Why does it show "offline" status?#
A: Claude Code checks network status by connecting to Google. Showing "offline" doesn't affect normal usage; it just indicates inability to connect to Google.Q: Why does web page Fetch fail?#
A: Claude Code needs to call Claude service for security checks before accessing web pages. You need to:Maintain a stable international internet connection
Use a global proxy if necessary
Q: Requests always show "fetch failed"?#
A: This may be caused by network environment issues. Solution:Q: How to handle API errors?#
A: This may be caused by unstable forwarding proxy. Recommendations:Exit Claude Code (Ctrl+C)
Re-run the claude command
If the problem persists, try again later
Q: Web login error?#
A: Try clearing the site's cookies, then log in again.📌 Notes#
This site directly connects to the official Claude Code forwarding service
Only supports Claude Code API traffic, not other API calls
Please keep your API token secure and avoid leakage
💡 Tip: If you encounter other issues, please check the official documentation or contact technical support. Modified at 2026-09-28 09:50:55
