Claude Code installation and usage tutorial

Claude Code is a powerful AI programming assistant that allows you to program collaboratively with AI directly in the terminal. This tutorial will guide you through the installation and configuration process.

📋 System Requirements

Node.js version ≥ 18.0

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:

3. Configure and start using

Obtain necessary configuration information

You need to prepare two important configuration items:

Configuration items	Description	Obtain method
ANTHROPIC_AUTH_TOKEN	API authentication token	After registration, click `Add Token` on the `API Token` page to obtain it (starting with `sk-`)
ANTHROPIC_BASE_URL	API service address	Use `https://yossapi.com` (same as the main site address)

📝 Recommended settings when creating a token:
Name: Name it whatever you want
Quota: Set to unlimited quota
Group: Choose Claude code exclusive or official transfer to Claude 3 and above
Other options: keep default settings

Start Claude Code

In your project directory run:

First run configuration

Once launched, you will see the following configuration steps:

Select Theme → Select your favorite theme + Press Enter

Safety Instructions → Confirm safety instructions + press Enter

Terminal Configuration → Use default configuration + press Enter

Working Directory Trust → Trust current directory + press Enter

✨ **Congratulations! ** Now you can start coding with your AI programming partner!

❓ FAQ

A: This indicates that Claude Code did not detect the environment variable. Please check:

Are ANTHROPIC_AUTH_TOKEN and ANTHROPIC_BASE_URL set correctly?

Whether the environment variable value is correct (the token starts with sk-)

If a permanent configuration is used, whether the terminal is restarted

Q: Why is the "offline" status displayed?

A: Claude Code determines the network status by connecting to Google. Displaying "offline" does not affect normal use, it just indicates that you cannot connect to Google.

Q: Why does Fetch fail when browsing the web?

A: Claude Code needs to call the Claude service for security check before accessing the web page. You need:

Maintain a stable international internet connection

Use global proxies when necessary

Q: The request always shows "fetch failed"?

A: The problem may be caused by the network environment. Solution:

Try using a proxy tool

Q: How to handle API errors?

A: It may be caused by the instability of the forwarding agent. Suggestions:

Exit Claude Code (Ctrl+C)

Rerun the claude command

If the problem persists, please try again later

A: Try clearing the cookies on this site and logging in again.

📌 Notes

This site is directly connected to the official Claude Code forwarding service

Only supports Claude Code's API traffic, and does not support other API calls

Please keep your API token properly to avoid leakage

Claude Code official documentation

Node.js official website

💡 Tip: If you encounter other problems, please check the official documentation or contact technical support.

Claude Code installation and usage tutorial

Claude Code installation and usage tutorial#

📋 System Requirements#

🚀 Quick Start#

1. Install Node.js#

Ubuntu/Debian users#

macOS users#

2. Install Claude Code#

3. Configure and start using#

Obtain necessary configuration information#

Start Claude Code#

First run configuration#

❓ FAQ#

Q: Encountered "Invalid API Key · Please run /login" error?#

Q: Why is the "offline" status displayed?#

Q: Why does Fetch fail when browsing the web?#

Q: The request always shows "fetch failed"?#

Q: How to handle API errors?#

Q: Web page login error?#

📌 Notes#

🔗 Related links#

Claude Code installation and usage tutorial

📋 System Requirements

🚀 Quick Start

1. Install Node.js

Ubuntu/Debian users

macOS users

2. Install Claude Code

3. Configure and start using

Obtain necessary configuration information

Start Claude Code

First run configuration

❓ FAQ

Q: Encountered "Invalid API Key · Please run /login" error?

Q: Why is the "offline" status displayed?

Q: Why does Fetch fail when browsing the web?

Q: The request always shows "fetch failed"?

Q: How to handle API errors?

Q: Web page login error?

📌 Notes

🔗 Related links