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Claude Code is an agentic programming tool from Anthropic that runs in your terminal. It can understand your codebase and help you code faster by performing routine tasks. This site provides an Anthropic SDK-compatible LLM API service, allowing you to easily use multiple large language models in Claude Code to complete tasks. Please follow the guide below to complete the integration.
  1. Install Claude Code
Run the following command in your terminal to install Claude Code: ⚠️ Before installing Claude Code, make sure your local environment has Node.js 18 or later installed. 
npm install -g @anthropic-ai/claude-code
  1. Start a terminal session
{
  export ANTHROPIC_BASE_URL="https://api.highwayapi.ai/anthropic"
  export ANTHROPIC_AUTH_TOKEN="<API Key>"
  # Set a model supported by this platform
  export ANTHROPIC_MODEL="claude-opus-4-1-20250805"
  export ANTHROPIC_SMALL_FAST_MODEL="claude-sonnet-4-20250514"
}
Next, enter your project directory and start Claude Code: 
cd <your-project-directory>
claude .