Fitz claims full FastAPI observability with two decorators vs OpenTelemetry's 60-line setup

Achieving full observability in FastAPI applications traditionally requires installing six pip packages and writing roughly 60 lines of configuration code to wire together traces, metrics, and logs using OpenTelemetry. The so-called 'Sacred Triangle' of observability — traces, metrics, and structured logs — has become the industry standard in 2026, with OpenTelemetry being the go-to framework across all three pillars. A developer tool called Fitz claims to replicate this full setup using just two decorators and a single environment variable, automatically correlating trace IDs across logs and spans while redacting secrets by default. The standard OpenTelemetry approach in Python involves packages such as opentelemetry-distro, prometheus-fastapi-instrumentator, and structlog, along with custom glue code to inject trace context into structured log output. The comparison highlights a growing demand for simpler developer tooling as observability requirements become more complex in production FastAPI services.