Claude Code

Claude Code is Anthropic's official terminal coding assistant. It decides where to send requests based on two environment variables, ANTHROPIC_BASE_URL and ANTHROPIC_AUTH_TOKEN — simply point them at FIM Gate.

Setup

1. Install Claude Code:

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

2. Edit the user-level settings file ~/.claude/settings.json (create it if it doesn't exist) and add the following to the env field:

   {
     "env": {
       "ANTHROPIC_BASE_URL": "https://api.gate.fim.ai",
       "ANTHROPIC_AUTH_TOKEN": "$FIM_API_KEY",
       "CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS": "1",
       "CLAUDE_CODE_ATTRIBUTION_HEADER": "0"
     }
   }

   Replace $FIM_API_KEY with the key you created in the Console.

3. Launch and use it as usual:

   # Interactive session
   claude
   
   # One-off question
   claude "Explain the directory structure of this project"

FAQ

What if I get an invalid beta flag error?

This happens when Claude Code sends experimental beta flags. Check that your configuration includes "CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS": "1", add it if missing, then restart claude.