Claude Code Setup Guide

Overview

Claude Code is Anthropic’s official command-line programming assistant. By configuring LaoZhang API, you can:

🚀 Stable Connection

Direct access, no proxy needed

💰 Cost Effective

No $200/month Claude Max subscription

⚡ High Concurrency

Unlimited parallel requests

🔧 Simple Setup

Complete configuration in minutes

Quick Start

Simplified Setup: If you don’t want to register a Claude account, check the Project Configuration section below. Using .claude.json file can completely bypass official verification.

1. Install Claude Code

Run the following command to install globally:

npm install -g @anthropic-ai/claude-code

Requires Node.js 18 or higher. If not installed, download from nodejs.org.

2. Get API Key

Visit LaoZhang API Console
Create a new token, select “Claude Code” group
Copy the key for later use (format: sk-...)

Important: You must select the “Claude Code” group when creating the token, otherwise it may not work properly.

3. Configure Claude Code (Recommended)

Edit ~/.claude/settings.json file:

vim ~/.claude/settings.json

Add the following content:

{
    "env": {
      "ANTHROPIC_BASE_URL": "https://api.yelinai.com",
      "ANTHROPIC_AUTH_TOKEN": "sk-your-laozhang-api-key",
      "ANTHROPIC_MODEL": "claude-opus-4-5-20251101"
    }
}

Configuration Notes:

ANTHROPIC_BASE_URL: Points to LaoZhang API proxy
ANTHROPIC_AUTH_TOKEN: Your API key (from console)
ANTHROPIC_MODEL: Default model to use (optional)

Save and you’re ready to go. No need to restart terminal.

4. Launch Claude Code

Navigate to your project directory and start:

cd ~/Desktop/my-project
claude

First launch will show API configuration info. Confirm and start using.

Model Selection

Models supported in Claude Code group:

Model	Model ID	Features
Claude Opus 4.5	`claude-opus-4-5-20251101`	Latest & most powerful, recommended
Claude Opus 4.5 Thinking	`claude-opus-4-5-20251101-thinking`	Chain of thought reasoning
Claude Sonnet 4.5	`claude-sonnet-4-5-20250929`	Balance of performance & cost
Claude Opus 4.1	`claude-opus-4-1-20250805`	Enhanced reasoning
Claude Sonnet 4	`claude-sonnet-4-20250514`	Excellent coding capability
Claude 3.7 Sonnet	`claude-3-7-sonnet-20250219`	Stable & reliable
Claude Haiku 4.5	`claude-haiku-4-5-20251001`	Fast response, low cost
Claude 3.5 Sonnet	`claude-3-5-sonnet-20241022`	Classic stable version
Claude 3.5 Haiku	`claude-3-5-haiku-20241022`	Lightweight & fast

Models with -thinking suffix support chain-of-thought reasoning, ideal for complex problem analysis.

Usage Guide

Basic Commands

claude
# Shows API Key and Base URL
# Confirm configuration and continue

Workflow

Start: Run claude in project directory
Describe: Input your programming needs
Interact: Claude understands context and provides suggestions
Apply: Claude can directly modify files

Supported Features

✅ Code generation and optimization
✅ Bug fixing and debugging
✅ Code refactoring
✅ Documentation writing
✅ Test case generation
✅ Technical Q&A
✅ Multi-file editing (Agent mode)

Troubleshooting

Unable to Connect to Anthropic Services Check the following:

Environment variables are correctly set
API key is valid
Network connection is stable

echo $ANTHROPIC_API_KEY
echo $ANTHROPIC_BASE_URL

Requires Claude Account Authorization Create .claude.json with hasCompletedOnboarding: true:

{
  "apiKey": "sk-your-laozhang-api-key",
  "apiBaseUrl": "https://api.yelinai.com",
  "hasCompletedOnboarding": true
}

Invalid API Key Ensure you’re using a LaoZhang API key. Check at LaoZhang API Console. How to Update Claude Code

npm update -g @anthropic-ai/claude-code

Best Practices

Effective Prompts

Good prompts:
"Refactor this Python function for efficiency and add type annotations"
"This code has a memory leak, find and fix it"
"Write unit tests for this React component"

Avoid vague prompts:
"Improve my code"  # Too vague

Performance Tips

Use project config: .claude.json avoids verification, faster startup
Keep conversations coherent: Handle related tasks in one session
Be specific: Clear descriptions reduce round trips

Official Docs

Claude Code Official Documentation

API Console

Manage API Keys

Model Info

Learn about Claude models

Cline Setup

VS Code AI Agent Need help? Visit LaoZhang API for support.

Overview

Conversational AI

Programming

Engineering

Translation

Claude Code Setup Guide

Overview

🚀 Stable Connection

💰 Cost Effective

⚡ High Concurrency

🔧 Simple Setup

Quick Start

1. Install Claude Code

2. Get API Key

3. Configure Claude Code (Recommended)

4. Launch Claude Code

Model Selection

Usage Guide

Basic Commands

Workflow

Supported Features

Troubleshooting

Best Practices

Effective Prompts

Performance Tips

Official Docs

API Console

Model Info

Cline Setup

​Overview

​🚀 Stable Connection

​💰 Cost Effective

​⚡ High Concurrency

​🔧 Simple Setup

​Quick Start

​1. Install Claude Code

​2. Get API Key

​3. Configure Claude Code (Recommended)

​4. Launch Claude Code

​Model Selection

​Usage Guide

​Basic Commands

​Workflow

​Supported Features

​Troubleshooting

​Best Practices

​Effective Prompts

​Performance Tips

​Related Resources

​Official Docs

​API Console

​Model Info

​Cline Setup

Overview

🚀 Stable Connection

💰 Cost Effective

⚡ High Concurrency

🔧 Simple Setup

Quick Start

1. Install Claude Code

2. Get API Key

3. Configure Claude Code (Recommended)

4. Launch Claude Code

Model Selection

Usage Guide

Basic Commands

Workflow

Supported Features

Troubleshooting

Best Practices

Effective Prompts

Performance Tips

Related Resources

Official Docs

API Console

Model Info

Cline Setup