Claude Code

Claude Code connects to Claudin.io through its Anthropic-compatible endpoint. Point its base URL at Claudin.io and use your key as the auth token.

Quick setup (script)

First export your key so $CLAUDINIO_API_KEY is set, then run this. It writes ~/.claude/settings.json (backing up any existing file first):

claude_settings_install() {
  local key="$1"
  local dir="$HOME/.claude"
  local file="$dir/settings.json"

  mkdir -p "$dir"

  if [ -f "$file" ]; then
    cp "$file" "$file.claudinio.bak"
    echo "[ok] Backup: $file.claudinio.bak"
  fi

  cat > "$file" <<JSONEOF
{
  "model": "claudinio",
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.claudin.io",
    "ANTHROPIC_AUTH_TOKEN": "${key}",
    "CLAUDE_CODE_SUBAGENT_MODEL": "claudinio",
    "ANTHROPIC_API_KEY": ""
  }
}
JSONEOF

  echo "[ok] Configured: $file"
}

claude_settings_install "$CLAUDINIO_API_KEY"
unset claude_settings_install

Then just run claude.

Manual setup

Edit ~/.claude/settings.json yourself:

{
  "model": "claudinio",
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.claudin.io",
    "ANTHROPIC_AUTH_TOKEN": "YOUR_API_KEY",
    "CLAUDE_CODE_SUBAGENT_MODEL": "claudinio",
    "ANTHROPIC_API_KEY": ""
  }
}

Why ANTHROPIC_API_KEY is empty

Claude Code prefers ANTHROPIC_API_KEY if it's set. Leaving it empty forces it to use ANTHROPIC_AUTH_TOKEN (your Claudin.io key) against the Claudin.io base URL.

Values used

Setting	Value
Base URL	https://api.claudin.io
Model	claudinio
Subagent model	claudinio
Auth	ANTHROPIC_AUTH_TOKEN = your key

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Trouble? See common errors or the FAQ.