{"id":"helicone-api","name":"Helicone API","af_score":83.5,"security_score":null,"reliability_score":null,"what_it_does":"Helicone is an LLM observability and proxy platform. Drop one header into any OpenAI (or Anthropic, Azure, Mistral, etc.) API call and all requests are logged, analyzed, and monitored. Features include: request/response logging, cost tracking, latency monitoring, user-level analytics, prompt management and versioning, A/B testing, smart caching (LLM semantic cache), rate limiting, and custom dashboards. Supports agent tracing with session IDs and custom properties for debugging multi-step agent workflows.","best_when":"You're running LLM-powered agents in production and need visibility into costs, errors, and performance. The proxy-based architecture means zero code changes beyond adding one header — just change your base URL and add the Helicone-Auth header.","avoid_when":"You cannot accept a proxy in your LLM call path for latency or compliance reasons, or your compliance requirements prohibit routing API responses through third parties.","last_evaluated":"2026-03-01T09:50:05.677341+00:00"}