yubico-client
Library for verifying Yubikey One Time Passwords (OTPs)
Decision gist · record as of 2026-08-14
No, unless you are maintaining legacy code already using this package. The project is abandoned (no releases since 2020-05-21, last commit 2022-09-07) and has not been tested with Python versions beyond 3.8 or requests versions beyond 2.22.0. For new YubiKey integrations, evaluate current Yubico SDKs or maintained authentication libraries. If you must use it, verify compatibility with your Python and dependency versions before deploying.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- You must obtain a Yubico client ID and secret key from Yubico's developer portal before calling verify().
- Low install friction with a single runtime dependency (requests).
- However, the package is in abandoned maintenance status with no releases since 2020-05-21; the last repository commit was 2022-09-07.
License · maintenance · safety
BSD (permissive) — Distributed under the BSD 3-Clause License (permissive), which allows commercial and private use with minimal restrictions—you may use, modify, and distribute the code provided you include the original license notice.
last release 2020-05-21 (2276 days) · last repo commit 2022-09-07 · 83 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 87,575 downloads/mo, #13,785 on PyPI
Alternatives
Verify before relying
pip install yubico-client
from yubico_client import Yubico
client = Yubico(client_id='your_client_id', secret_key='your_secret_key')
result = client.verify('otp_string')- Whether the package works reliably with modern versions of requests beyond 2.22.0 (last tested in 2020).
- Whether Yubico's API servers still accept requests from this client version or if protocol changes have occurred.
- Current compatibility with Python 3.9+ (package was last tested through Python 3.8).
What it is and what it does
Yubico Client is a Python library that validates one-time passwords (OTPs) generated by Yubico hardware tokens (YubiKeys) using Yubico's validation protocol version 2.0. It wraps HTTP communication with Yubico's API servers, handling OTP verification, retry logic for transient server errors, and SSL certificate validation. The library is designed for developers integrating YubiKey authentication into Python applications.
The package depends only on requests for HTTP communication and offers a simple constructor-based API where you provide a client ID and secret key, then call verify() with an OTP string. It supports querying custom internal validation servers if you run your own infrastructure. However, the project has been abandoned since 2020 with no maintenance activity; it was last tested against Python 3.8 and requests 2.22.0, so compatibility with newer Python versions and dependency versions is unverified.
Use it for
- Integrate YubiKey two-factor authentication into a Python web application or service.
- Validate OTPs from hardware tokens in a legacy system still running Python 2.7 or early Python 3.
- Build a custom authentication layer that queries Yubico's validation API servers.
- Operate an internal YubiKey validation server and use this client to communicate with it.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
No, unless you are maintaining legacy code already using this package.
The project is abandoned (no releases since 2020-05-21, last commit 2022-09-07) and has not been tested with Python versions beyond 3.8 or requests versions beyond 2.22.0. For new YubiKey integrations, evaluate current Yubico SDKs or maintained authentication libraries. If you must use it, verify compatibility with your Python and dependency versions before deploying.
Install
yubico-client on PyPI
Before you install
Low install friction with a single runtime dependency (requests). However, the package is in abandoned maintenance status with no releases since 2020-05-21; the last repository commit was 2022-09-07. Use only if you are locked into an existing integration or running legacy systems.
You must obtain a Yubico client ID and secret key from Yubico's developer portal before calling verify().
License in practice
Distributed under the BSD 3-Clause License (permissive), which allows commercial and private use with minimal restrictions—you may use, modify, and distribute the code provided you include the original license notice.
Quickstart
pip install yubico-client
from yubico_client import Yubico
client = Yubico(client_id='your_client_id', secret_key='your_secret_key')
result = client.verify('otp_string')Verify before relying
- Whether the package works reliably with modern versions of requests beyond 2.22.0 (last tested in 2020).
- Whether Yubico's API servers still accept requests from this client version or if protocol changes have occurred.
- Current compatibility with Python 3.9+ (package was last tested through Python 3.8).
Package facts
| License | BSD permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packagerequests |
| Maintenance | Abandoned 2,276 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 87,575 / month, #13,785 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 4 - BetaEnvironment :: ConsoleIntended Audience :: DevelopersIntended Audience :: System AdministratorsLicense :: OSI Approved :: BSD LicenseOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 2.7Programming Language :: Python :: 3.3Programming Language :: Python :: 3.4Programming Language :: Python :: 3.5Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: Implementation :: PyPyTopic :: SecurityTopic :: Software Development :: Libraries :: Python Modules |
Evidence: yubico_client-1.13.0-py2.py3-none-any.whl
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See also PyOTP · fido2 · django-otp · django-two-factor-auth · authy · oathtool · pyu2f · secure-smtplib · django-otp-webauthn · vonage-verify-legacy