A2in9S API Gateway

API Endpoints:

• POST /v1/chat/completions (OpenAI compatible)
• POST /v1/messages (Anthropic compatible)
• POST /v1beta/models/{model}:generateContent (Google Gemini compatible)

Admin: Visit /admin to manage keys. First, setup password via POST /api/admin/setup.

Usage: Add OpenRouter keys in admin, set custom API key for auth.