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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

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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.

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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.

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2. Get API Key

  1. Visit LaoZhang API Console
  2. Create a new token, select “Claude Code” group
  3. 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.
Edit ~/.claude/settings.json file: 
vim ~/.claude/settings.json
Add the following content: 
{
    "env": {
      "ANTHROPIC_BASE_URL": "https://api.laozhang.ai",
      "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.

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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.

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Model Selection

Models supported in Claude Code group:
ModelModel IDFeatures
Claude Opus 4.5claude-opus-4-5-20251101Latest & most powerful, recommended
Claude Opus 4.5 Thinkingclaude-opus-4-5-20251101-thinkingChain of thought reasoning
Claude Sonnet 4.5claude-sonnet-4-5-20250929Balance of performance & cost
Claude Opus 4.1claude-opus-4-1-20250805Enhanced reasoning
Claude Sonnet 4claude-sonnet-4-20250514Excellent coding capability
Claude 3.7 Sonnetclaude-3-7-sonnet-20250219Stable & reliable
Claude Haiku 4.5claude-haiku-4-5-20251001Fast response, low cost
Claude 3.5 Sonnetclaude-3-5-sonnet-20241022Classic stable version
Claude 3.5 Haikuclaude-3-5-haiku-20241022Lightweight & fast
Models with -thinking suffix support chain-of-thought reasoning, ideal for complex problem analysis.

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Usage Guide

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Basic Commands

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

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Workflow

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

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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)

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Troubleshooting

Check the following:
  1. Environment variables are correctly set
  2. API key is valid
  3. Network connection is stable
echo $ANTHROPIC_API_KEY
echo $ANTHROPIC_BASE_URL
Create .claude.json with hasCompletedOnboarding: true:
{
  "apiKey": "sk-your-laozhang-api-key",
  "apiBaseUrl": "https://api.laozhang.ai",
  "hasCompletedOnboarding": true
}
Ensure you’re using a LaoZhang API key. Check at LaoZhang API Console.
npm update -g @anthropic-ai/claude-code

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Best Practices

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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

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Performance Tips

  1. Use project config: .claude.json avoids verification, faster startup
  2. Keep conversations coherent: Handle related tasks in one session
  3. 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.