Set up Claude Code

Claude Code is Anthropic's official terminal AI coding tool. You can use it through 树新在线 as a relay.

Install

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

Option 1: Environment variables (recommended)

Add the following to ~/.zshrc or ~/.bashrc:

export ANTHROPIC_BASE_URL="https://api.treenew.online"
export ANTHROPIC_AUTH_TOKEN="sk-your-token"

After saving, run source ~/.zshrc (or reopen the terminal) to apply.

Mind the variable name

It is ANTHROPIC_AUTH_TOKEN, not ANTHROPIC_API_KEY. Use the former for relay scenarios.

Option 2: settings.json

Edit ~/.claude/settings.json (create it if it doesn't exist):

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.treenew.online",
    "ANTHROPIC_AUTH_TOKEN": "sk-your-token"
  }
}

This applies to all terminal sessions without editing your shell config.

Specify a model (optional)

export ANTHROPIC_MODEL="claude-sonnet-5"

Or switch inside Claude Code with the /model command. Available model names are as shown in the console's “Model Square”.

Verify

claude

Ask any question; a normal reply means the setup succeeded.

Troubleshooting

• 401 error: the token is invalid or expired — re-check ANTHROPIC_AUTH_TOKEN
• Model not found: the token's group does not include the Claude series — check the token's group in the console
• Config not applied: when both an environment variable and settings.json exist, the environment variable takes precedence; make sure no stale value remains (echo $ANTHROPIC_BASE_URL)