Claude Code

An easier way

• Use magpie to switch with one click. You don’t touch any config files.
• Or, in the API Keys (API 密钥) list in the console, click Use Key (使用密钥) next to your key and copy the Claude Code configuration the console generates.

Before you start, create a key in the CC-Max group in the console. Claude Code can’t use a key from a GPT group.

Install

Use the official installer. Pick the one for your system:

macOS / Linux / WSL

curl -fsSL https://claude.ai/install.sh | bash

Windows PowerShell

irm https://claude.ai/install.ps1 | iex

Windows CMD

curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmd

Other methods

brew install --cask claude-code
winget install Anthropic.ClaudeCode
npm install -g @anthropic-ai/claude-code

The npm method needs Node.js 22 or later. Don’t use sudo.

After installing, reopen your terminal and run claude --version. If it prints a version number, you are set.

Configure

1. Open ~/.claude/settings.json (on Windows, %USERPROFILE%\.claude\settings.json). Create it if it doesn’t exist, and write:

   ~/.claude/settings.json

   {
     "env": {
       "ANTHROPIC_BASE_URL": "https://2api.dev",
       "ANTHROPIC_AUTH_TOKEN": "sk-your-key",
       "CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC": "1"
     }
   }

   • The address is the root address. Do not add /v1. Claude Code adds /v1/messages itself.
   • If the file already has other settings, merge these lines into env. Don’t overwrite the whole file.
   • JSON doesn’t allow comments, and the last item can’t be followed by a comma.

2. Configure first, then start. If you finish step 1 before you run claude for the first time, the login screen usually doesn’t appear. If it still gets stuck on the login screen or the screen for choosing a login method, open ~/.claude.json (note that this is not settings.json), add "hasCompletedOnboarding": true at the top level, save, and start it again. This setting isn’t in the official documentation, but tools such as CC Switch use it the same way to skip the first-run setup. To restore the official login later, delete this line.

3. Go to your project directory and start it:

   cd your-project
   claude

   In Claude Code, type /status. If the Anthropic base URL shows https://2api.dev, the configuration is in effect. Use /model to switch models.

Update it manually

CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC also turns off automatic updates. Run claude update every so often. A version that is too old can have a low cache hit rate and charge you more than it should.

Try it temporarily

Don’t change any files. Set the environment variables in the current terminal. They stop working when you close the window.

macOS / Linux / WSL

export ANTHROPIC_BASE_URL="https://2api.dev"
export ANTHROPIC_AUTH_TOKEN="sk-your-key"
export CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1
claude

Windows PowerShell

$env:ANTHROPIC_BASE_URL="https://2api.dev"
$env:ANTHROPIC_AUTH_TOKEN="sk-your-key"
$env:CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1
claude

Windows CMD

set ANTHROPIC_BASE_URL=https://2api.dev
set ANTHROPIC_AUTH_TOKEN=sk-your-key
set CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1
claude

In CMD, don’t use quotes after the equals sign. The quotes become part of the value.

Set only one key variable

Don’t set ANTHROPIC_AUTH_TOKEN and ANTHROPIC_API_KEY at the same time. If you do, Claude Code reports an authentication conflict. If your system environment variables or ~/.zshrc still contain an old ANTHROPIC_API_KEY, delete it first.

Model not found in background tasks

Claude Code uses a smaller model for background tasks. If the error shows a model name you haven’t used (such as haiku), also set the background models to a model your group has:

~/.claude/settings.json

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://2api.dev",
    "ANTHROPIC_AUTH_TOKEN": "sk-your-key",
    "CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC": "1",
    "ANTHROPIC_DEFAULT_HAIKU_MODEL": "a-model-in-your-group",
    "CLAUDE_CODE_SUBAGENT_MODEL": "a-model-in-your-group"
  }
}

Look up model names with /v1/models.

Next steps

• To use it in VS Code or Cursor: Claude Code extension
• If you get an error: Claude Code FAQ