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fastapi-logging

Configure structured JSON logging with correlation IDs for FastAPI applications.

3|Updated Jan 20, 2026
Search Tags:#fastapi#logging#middleware#correlation-id#structured-logging#logging-setup
One-click install
npx skills add https://github.com/agusmdev/burntop --skill fastapi-logging
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: fastapi-logging
Source: https://github.com/agusmdev/burntop/tree/main/.claude/skills/fastapi-logging
Command: npx skills add https://github.com/agusmdev/burntop --skill fastapi-logging

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill enables structured JSON logging with automatic correlation IDs for FastAPI applications, improving observability and traceability across requests.

Core Features & Use Cases

  • Structured JSON log output with timestamp, level, logger, and correlation_id for easy analysis.
  • CorrelationIdMiddleware to generate or propagate a unique request ID across services.
  • Early boot configuration via setup_logging() to standardize logs before app startup.
  • Usage in services can utilize get_logger(name) to emit context-rich logs.

Quick Start

Install dependencies (e.g., python3 -m pip install fastapi uvicorn python-json-logger) and add in your FastAPI app:

  • Call setup_logging() before creating the FastAPI instance.
  • Add CorrelationIdMiddleware to the app.
  • Use get_logger to emit structured logs.

Frequently Asked Questions about fastapi-logging

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

FAQPage Schema
How do I configure structured JSON logging in a FastAPI application?▼

Configure structured JSON logging in FastAPI by calling setup_logging() before app creation and adding CorrelationIdMiddleware. This standardizes log outputs with timestamps, levels, and correlation IDs across request handling contexts.

How do I trace requests across distributed FastAPI services?▼

Trace requests across distributed FastAPI services by applying CorrelationIdMiddleware to generate and propagate a unique correlation ID. This ID links related log entries across different services into a single traceable request flow.

Why do I need structured logging for FastAPI middleware?▼

Structured logging for FastAPI middleware provides consistent JSON outputs containing timestamp, level, logger, and correlation_id. This format enables easy parsing and analysis when monitoring distributed services and tracing request lifecycles.

Can I use python-json-logger with FastAPI for structured logs?▼

Use python-json-logger with FastAPI by installing it alongside uvicorn and invoking setup_logging() at early boot. This configures the logger to emit structured JSON formats before the application starts handling requests.

What is the best way to standardize FastAPI logs before startup?▼

Standardize FastAPI logs before startup by invoking setup_logging() early in the boot process. This utility configures the logging framework globally to ensure consistent structured outputs immediately when the application launches.

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