opencensus-ext-flask
OpenCensus Flask Integration
Decision gist · record as of 2026-08-14
No. The package is abandoned (no releases since 2023-03-10, repository archived as of 2025-06-12) and receives no maintenance or security updates. While it may work for legacy Flask applications already using it, new projects should adopt actively maintained alternatives for distributed tracing. Existing users should plan migration to a supported solution.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Installation is straightforward with low friction.
- However, the package is in abandoned status with no releases since 2023-03-10 and the repository archived as of 2025-06-12, meaning no active maintenance or security updates.
License · maintenance · safety
Apache-2.0 (permissive) — Licensed under Apache-2.0 (permissive), which allows commercial and private use with minimal restrictions—suitable for most projects, though you assume responsibility for any unpatched issues.
last release 2023-03-10 (1253 days) · last repo commit 2025-06-12 · 676 stars · archived
0 known vulnerabilities (OSV.dev, 2026-08-14) · 74,143 downloads/mo, #14,870 on PyPI
Alternatives
Verify before relying
pip install opencensus-ext-flask
from flask import Flask
from opencensus.ext.flask.flask_middleware import FlaskMiddleware
app = Flask(__name__)
middleware = FlaskMiddleware(app, excludelist_paths=['_ah/health'])
@app.route('/')
def hello():
return 'Hello World!'
if __name__ == '__main__':
app.run(host='localhost', port=8080, threaded=True)- Compatibility with modern Flask and Python versions beyond those listed in classifiers (3.9 is the latest listed).
- Whether the abandoned status and archived repository affect real-world reliability or if the package remains stable for existing deployments.
- Current state of the opencensus backend ecosystem and whether exporters referenced in configuration examples are still maintained.
What it is and what it does
OpenCensus Flask Integration is a middleware package that instruments Flask applications to collect distributed tracing data. It wraps incoming requests and exports trace spans to configured backends (such as Jaeger, Zipkin, or Google Cloud Trace), allowing you to track request flow across microservices and diagnose performance issues. The middleware integrates directly into Flask's request/response cycle and supports configuration of samplers and exporters via Flask's config dictionary.
The package depends on flask and opencensus as runtime dependencies. It is designed to be dropped into existing Flask applications with minimal code changes—typically just instantiating the middleware with your app instance. Configuration options allow you to exclude certain paths from tracing and customize sampling and export behavior.
Use it for
- Instrument a Flask microservice to emit traces to a distributed tracing backend for end-to-end request visibility.
- Exclude health-check endpoints from tracing to reduce noise in trace data collection.
- Configure probabilistic sampling to control trace volume while maintaining observability of production traffic.
- Export Flask request traces to a centralized trace collector for multi-service debugging and latency analysis.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
No.
The package is abandoned (no releases since 2023-03-10, repository archived as of 2025-06-12) and receives no maintenance or security updates. While it may work for legacy Flask applications already using it, new projects should adopt actively maintained alternatives for distributed tracing. Existing users should plan migration to a supported solution.
Install
opencensus-ext-flask on PyPI
Before you install
Installation is straightforward with low friction. However, the package is in abandoned status with no releases since 2023-03-10 and the repository archived as of 2025-06-12, meaning no active maintenance or security updates.
License in practice
Licensed under Apache-2.0 (permissive), which allows commercial and private use with minimal restrictions—suitable for most projects, though you assume responsibility for any unpatched issues.
Quickstart
pip install opencensus-ext-flask
from flask import Flask
from opencensus.ext.flask.flask_middleware import FlaskMiddleware
app = Flask(__name__)
middleware = FlaskMiddleware(app, excludelist_paths=['_ah/health'])
@app.route('/')
def hello():
return 'Hello World!'
if __name__ == '__main__':
app.run(host='localhost', port=8080, threaded=True)Verify before relying
- Compatibility with modern Flask and Python versions beyond those listed in classifiers (3.9 is the latest listed).
- Whether the abandoned status and archived repository affect real-world reliability or if the package remains stable for existing deployments.
- Current state of the opencensus backend ecosystem and whether exporters referenced in configuration examples are still maintained.
Package facts
| License | Apache-2.0 permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagesflaskopencensus |
| Maintenance | Abandoned 1,253 days since the last release |
| Last repo commit | repository archived |
| First released | |
| Downloads | 74,143 / month, #14,870 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 3 - AlphaIntended Audience :: DevelopersLicense :: OSI Approved :: Apache Software LicenseProgramming Language :: PythonProgramming Language :: Python :: 2Programming Language :: Python :: 2.7Programming Language :: Python :: 3Programming Language :: Python :: 3.4Programming Language :: Python :: 3.5Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9 |
Evidence: opencensus_ext_flask-0.8.2-py2.py3-none-any.whl
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See also opencensus · opencensus-ext-requests · opencensus-ext-logging · opencensus-context · opentelemetry-instrumentation-flask · opencensus-ext-azure · opentracing · Flask-Log-Request-ID · flask-request-id-header