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pyopenssl

A Python wrapper around the OpenSSL library

oscrypto

Compiler-free Python crypto library backed by the OS, supporting CPython and PyPy

truststore

Verify certificates using OS trust stores

twisted

Event-driven networking engine written in Python.

primp

HTTP client that can impersonate web browsers

mitmproxy

An interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.

aioquic

QUIC and HTTP/3 implementation in Python

pem

PEM file parsing in Python.

trustme

#1 quality TLS certs while you wait, for the discerning tester

tls-client

Advanced HTTP Library

hstspreload

Chromium HSTS Preload list as a Python package and updated daily.

rnet

An ergonomic Python HTTP Client with TLS fingerprint

tlslite-ng

TLS implementation in pure python, focused on interoperability testing

tls-parser

Small library to parse TLS records.

sslyze

Fast and powerful SSL/TLS scanning library.

python-mbedtls

Cryptographic library with an mbed TLS back end

cdktf-cdktf-provider-tls

Prebuilt Terraform CDK (cdktf) provider for tls.

localstack-twisted

Event-driven networking engine written in Python.

hrequests

🚀 Web scraping for humans

wreq

An ergonomic Python HTTP Client with TLS fingerprint

ssllabs

Qualys SSL Labs API in python

dcert

A Rust CLI and MCP server for X.509 certificate analysis, format conversion, and key verification. Reads certificates from PEM files or HTTPS endpoints. Validates TLS connections, checks revocation status, converts between PFX and PEM formats and integrates with AI-powered IDEs via the Model Context Protocol (MCP) and Vault.

cymongoose

Python bindings for the Mongoose embedded networking library, built with Cython.

pki-tools

PKI tools for easy certificate management, checking CRL/OSCP status and more