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Overview

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

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🚀 Stable Connection

Direct access, no proxy needed

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💰 Cost Effective

No $200/month Claude Max subscription

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⚡ High Concurrency

Unlimited parallel requests

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🔧 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.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.

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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

Unable to Connect to Anthropic Services 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
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

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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

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Official Docs

Claude Code Official Documentation

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API Console

Manage API Keys

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Model Info

Learn about Claude models

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Cline Setup

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