Home / LLM Ops / Helicone LLM Ops Helicone — LLM observability in one line Open-source proxy that logs every LLM call with caching, rate limits and cost analytics. Official links www.helicone.ai Helicone/helicone Helicone features O Observability Trait Traces, logs and metrics Helicone implements A API Trait Application Programming Interface Helicone is written in TypeScript Language JavaScript With Syntax For Types