# Provider: anthropic | openai | openai-compatible | gemini
CAPTCHA_LLM_PROVIDER=anthropic
# Optional endpoint override (local/Ollama/OpenRouter). Empty = provider default.
CAPTCHA_LLM_BASE_URL=
CAPTCHA_LLM_API_KEY=sk-...
# Vision-capable model id (e.g. claude-opus-4-8, gpt-4o, gemini-2.5-pro)
CAPTCHA_LLM_MODEL=claude-opus-4-8
# Optional separate audio/transcription model (e.g. whisper-1). Empty = use MODEL.
CAPTCHA_LLM_AUDIO_MODEL=
CAPTCHA_LLM_MAX_TOKENS=1024
CAPTCHA_LLM_TIMEOUT=60s

# Transport: stdio (default, desktop clients) | http (MCP StreamableHTTP for cluster)
CAPTCHA_TRANSPORT=stdio
# HTTP transport only: listen address + MCP path. /healthz is always served.
CAPTCHA_HTTP_ADDR=:8080
CAPTCHA_HTTP_PATH=/mcp

CAPTCHA_LOG_LEVEL=info