{"service":"LLM Gateway","version":"1.0.0","status":"operational","integration":"GET /v1/gateway/info — single X-API-Key for apps; upstream keys on server","features":{"authentication":"API key validation","rate_limiting":"100 req/min","caching":"In-memory with TTL","monitoring":"Prometheus metrics","fallback":"Automatic provider fallback","routing":"cost | free_first | speed | quality | balanced + optional X-Task"}}