requests-pkcs12
Add PKCS#12 support to the requests library in a clean way, without monkey patching or temporary files
Decision gist · record as of 2026-08-14
Yes, if you need PKCS#12 support for requests. The implementation is clean, dependencies are minimal, and the license is permissive. The aging maintenance status (341 days since last release) is a minor concern but not a blocker—the package is stable and the repository remains active. No known vulnerabilities. Install if client certificate authentication is a requirement; skip if you can use PEM certificates directly.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.7 or later; cryptography and requests must be installed as runtime dependencies.
- Low friction install with only two runtime dependencies (cryptography and requests).
- Maintenance is aging—last release was 341 days ago—but the repository remains active and the package is marked Production/Stable.
License · maintenance · safety
ISC (permissive) — ISC license is permissive and places minimal restrictions on use or redistribution, making it suitable for most commercial and open-source projects.
last release 2025-09-07 (341 days) · last repo commit 2025-09-07 · 128 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 1,260,579 downloads/mo, #4,149 on PyPI
Alternatives
Verify before relying
pip install requests-pkcs12
from requests_pkcs12 import get
r = get('https://example.com/test', pkcs12_filename='clientcert.p12', pkcs12_password='correcthorsebatterystaple')- Whether the package is actively maintained or in maintenance-only mode given the 341-day gap since last release.
- Performance characteristics when handling large or many PKCS#12 certificates in high-throughput scenarios.
What it is and what it does
requests-pkcs12 extends the requests library to handle PKCS#12 (p12/pfx) certificate files for mutual TLS authentication. Instead of monkey patching or writing unencrypted temporary files, it creates a custom TransportAdapter that provides a custom SSLContext, integrating cleanly into requests' design. You can use it as a drop-in replacement for one-off requests or mount it to a session for repeated authenticated calls.
The package depends on cryptography for certificate handling and requests itself. It supports both file-based and in-memory certificate data, accepts optional password protection, and allows SSL protocol version configuration. The authors position it as a transitional solution until requests adds native PKCS#12 support.
Use it for
- Authenticate to APIs that require client certificates in PKCS#12 format without managing temporary unencrypted files.
- Build a requests Session with persistent PKCS#12-based authentication for repeated calls to the same endpoint.
- Migrate legacy systems using p12 certificates to Python without rewriting certificate handling infrastructure.
- Test HTTPS endpoints that enforce mutual TLS with client certificate validation during CI/CD pipelines.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need PKCS#12 support for requests.
The implementation is clean, dependencies are minimal, and the license is permissive. The aging maintenance status (341 days since last release) is a minor concern but not a blocker—the package is stable and the repository remains active. No known vulnerabilities. Install if client certificate authentication is a requirement; skip if you can use PEM certificates directly.
Install
requests-pkcs12 on PyPI
Before you install
Low friction install with only two runtime dependencies (cryptography and requests). Maintenance is aging—last release was 341 days ago—but the repository remains active and the package is marked Production/Stable.
Requires Python 3.7 or later; cryptography and requests must be installed as runtime dependencies.
License in practice
ISC license is permissive and places minimal restrictions on use or redistribution, making it suitable for most commercial and open-source projects.
Quickstart
pip install requests-pkcs12
from requests_pkcs12 import get
r = get('https://example.com/test', pkcs12_filename='clientcert.p12', pkcs12_password='correcthorsebatterystaple')Verify before relying
- Whether the package is actively maintained or in maintenance-only mode given the 341-day gap since last release.
- Performance characteristics when handling large or many PKCS#12 certificates in high-throughput scenarios.
Package facts
| License | ISC permissive |
| Python support | Supports the current Python release >=3.7 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagescryptographyrequests |
| Maintenance | Aging 341 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 1,260,579 / month, #4,149 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersLicense :: OSI Approved :: ISC License (ISCL)Programming Language :: Python :: 3Topic :: Software Development :: Libraries |
Evidence: requests_pkcs12-1.27-py3-none-any.whl
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See also python-certifi-win32 · requests-file · secure-smtplib · django-sslserver · ndg-httpsclient · truststore · pip-system-certs · wincertstore · asn1crypto · pyjks