opentelemetry-instrumentation-fastapi
OpenTelemetry FastAPI Instrumentation
Decision gist · record as of 2026-08-14
Yes, if you are running FastAPI and need request-level observability. The package is actively maintained, has low install friction, carries a permissive license, and integrates cleanly into the OpenTelemetry ecosystem. It is in beta status (0.65b0), so expect the API to remain stable for production use but be aware that minor breaking changes are possible in future releases.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later.
- Assumes an existing FastAPI application and a configured OpenTelemetry SDK (tracer provider, exporter) to actually export traces.
- Low install friction with a pure-Python wheel.
License · maintenance · safety
Apache-2.0 (permissive) — Apache-2.0 permissive license allows use in commercial and proprietary projects with minimal restrictions.
last release 2026-07-16 (29 days) · last repo commit 2026-08-13 · 1,086 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 94,203,520 downloads/mo, #362 on PyPI
Alternatives
Verify before relying
pip install opentelemetry-instrumentation-fastapi
from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor
from fastapi import FastAPI
app = FastAPI()
FastAPIInstrumentor.instrument_app(app)- Whether auto-instrumentation via opentelemetry-instrumentation entry points works out of the box without manual instrument_app() calls.
- Performance overhead of instrumentation on request latency in production workloads.
- Compatibility with async FastAPI middleware and background tasks.
What it is and what it does
This package adds automatic tracing to FastAPI web applications by hooking into the framework's request lifecycle. It generates OpenTelemetry spans for each HTTP request, capturing metadata like method, path, status code, and timing. The instrumentation integrates with the broader OpenTelemetry ecosystem, allowing traces to be exported to backends like Jaeger, Zipkin, or cloud observability platforms.
The package works as both an automatic instrumentation (via the opentelemetry-instrumentation package) and through manual API calls. It depends on opentelemetry-instrumentation-asgi as its foundation, since FastAPI is built on ASGI, and uses opentelemetry-semantic-conventions to label spans consistently. It's designed for developers who want request-level visibility into FastAPI services without rewriting application code.
Use it for
- Trace HTTP requests in FastAPI microservices to identify slow endpoints or bottlenecks.
- Export request spans to a centralized observability backend for distributed tracing across services.
- Debug production issues by correlating request traces with application logs and metrics.
- Monitor API performance and error rates by analyzing span data in real time.
- Instrument FastAPI applications for compliance or SLA monitoring without modifying handler code.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you are running FastAPI and need request-level observability.
The package is actively maintained, has low install friction, carries a permissive license, and integrates cleanly into the OpenTelemetry ecosystem. It is in beta status (0.65b0), so expect the API to remain stable for production use but be aware that minor breaking changes are possible in future releases.
Install
opentelemetry-instrumentation-fastapi on PyPI
Before you install
Low install friction with a pure-Python wheel. Active maintenance with a recent release (29 days old) and current repository activity. Depends on five OpenTelemetry core packages, all from the same ecosystem.
Requires Python 3.10 or later. Assumes an existing FastAPI application and a configured OpenTelemetry SDK (tracer provider, exporter) to actually export traces.
License in practice
Apache-2.0 permissive license allows use in commercial and proprietary projects with minimal restrictions.
Quickstart
pip install opentelemetry-instrumentation-fastapi
from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor
from fastapi import FastAPI
app = FastAPI()
FastAPIInstrumentor.instrument_app(app)Verify before relying
- Whether auto-instrumentation via opentelemetry-instrumentation entry points works out of the box without manual instrument_app() calls.
- Performance overhead of instrumentation on request latency in production workloads.
- Compatibility with async FastAPI middleware and background tasks.
Package facts
| License | Apache-2.0 permissive |
| Python support | Supports the current Python release >=3.10 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 5 packagesopentelemetry-apiopentelemetry-instrumentation-asgiopentelemetry-instrumentationopentelemetry-semantic-conventionsopentelemetry-util-http |
| Maintenance | Actively maintained 29 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 94,203,520 / month, #362 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 4 - BetaIntended Audience :: DevelopersLicense :: OSI Approved :: Apache Software LicenseProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14 |
Evidence: opentelemetry_instrumentation_fastapi-0.65b0-py3-none-any.whl
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See also opentelemetry-instrumentation-starlette · acceldata-sdk · opentelemetry-instrumentation-asgi · opentelemetry-instrumentation-agno · opentelemetry-instrumentation-openai-agents-v2 · logfire · opentelemetry-instrumentation-aiohttp-server · opentelemetry-instrumentation-flask · opentelemetry-util-http · opentelemetry-instrumentation-redis