FastAPI Observability

Implement structured logging, Prometheus metrics, OpenTelemetry tracing, and health checks for FastAPI applications.

18|2|Updated Dec 12, 2025
One-click install
npx skills add https://github.com/markus41/claude --skill fastapi-observability-markus41
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: FastAPI Observability
Source: https://github.com/markus41/claude/tree/main/plugins/fastapi-backend/skills/fastapi-observability
Command: npx skills add https://github.com/markus41/claude --skill fastapi-observability-markus41

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This skill provides comprehensive observability solutions for FastAPI applications, enabling developers to monitor performance, troubleshoot issues, and gain insights into application behavior.

Core Features & Use Cases

  • Structured Logging: Implements structured logging with structlog for consistent and searchable logs.
  • Prometheus Metrics: Integrates prometheus-fastapi-instrumentator for exposing application metrics.
  • OpenTelemetry Tracing: Sets up distributed tracing with OpenTelemetry for end-to-end request visibility.
  • Health Checks: Provides endpoints for liveness and readiness probes, crucial for containerized environments.
  • Use Case: Integrate these patterns into your FastAPI microservice to ensure it's observable in production, allowing for quick identification of performance bottlenecks or errors.

Quick Start

Integrate the FastAPI Observability skill into your FastAPI application to set up logging, metrics, and tracing.

Frequently Asked Questions about FastAPI Observability

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I add Prometheus metrics to a FastAPI application?

To add Prometheus metrics to FastAPI, you integrate the prometheus-fastapi-instrumentator library, which automatically exposes application metrics endpoints for monitoring performance and throughput.

What's the best way to implement structured logging in FastAPI?

The best way to implement structured logging in FastAPI is using structlog, which provides consistent and searchable logs to improve production troubleshooting and application behavior analysis.

How do I set up OpenTelemetry tracing for FastAPI microservices?

Set up OpenTelemetry tracing for FastAPI by configuring distributed tracing libraries, providing end-to-end request visibility across microservices to quickly identify performance bottlenecks.

Does FastAPI need liveness and readiness health check endpoints?

FastAPI needs liveness and readiness health check endpoints for containerized environments, serving as crucial probes to manage application state and ensure reliable production deployments.

Can I use FastAPI observability tools in a production microservice environment?

Yes, you can use FastAPI observability tools in production microservices to monitor performance, troubleshoot issues, and gain insights into application behavior using structured logging and tracing.

What is FastAPI observability and when do I need it?

FastAPI observability implements structured logging, metrics, and tracing to monitor web services, needed when you require production-ready monitoring and debugging for containerized applications.