Claude Code — Best API Configuration Guide

Claude Code integration guide:

1. Install Node.js

Require Node.js v18.0.0 or above. Download from https://nodejs.org/en/download

2. Install Claude Code globally

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

# check version
claude --version

3. Obtain API Key

Register on the site (e.g. https://api.morphogen.top), top up if needed, then copy your API key from the token management page. We recommend creating a token in the claude_cc group for lower cost.

4. Project configuration

1) Skip onboarding (optional)

Add "hasCompletedOnboarding": true to ~/.claude.json to skip login/onboarding.

2) Project-level settings

Create a .claude/settings.json in your project root and set your API key and model:

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.morphogen.top",
    "ANTHROPIC_AUTH_TOKEN": "sk-xxxxx",
    "ANTHROPIC_MODEL": "claude-sonnet-4-6",
    "ANTHROPIC_SMALL_FAST_MODEL": "claude-haiku-4-5-20251001",
    "CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS": 1
  }
}

You can switch models via command:

claude config set --global env '{"ANTHROPIC_MODEL": "claude-opus-4-6"}'

Start Claude Code from project root:

claude

3) Global settings (optional)

Place settings.json in the user .claude folder (e.g., C:\Users\<user>\.claude on Windows or ~/.claude/settings.json on macOS/Linux).

5. Best practices

• Add claude.md in project root with project notes for Claude to read.
• Monitor context size and use /clear or /compact when needed.

6. Troubleshooting

• For invalid beta flag or 400 errors, add CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS:1.
• To increase token limits, set CLAUDE_CODE_MAX_OUTPUT_TOKENS in settings.