Best OpenSSL MCP Servers
OpenSSL is a robust, commercial-grade, full-featured toolkit for the Transport Layer Security (TLS) protocols. It's an open-source implementation of the SSL and TLS protocols used to secure communications over computer networks.
Why this server?
Reads openssl.cnf (and PEM/DER key and certificate files with OIDs) to resolve the algorithms and hybrid TLS groups actually configured.
AlicenseAqualityAmaintenanceAn MCP server that scans local codebases for quantum-vulnerable cryptography (secp256k1, Ed25519, RSA, etc.) and CI signing commands, classifying each finding as quantum-broken, post-quantum, or neither. It runs entirely locally with no network calls, providing a deterministic inventory for AI agents.51,754 PyPI3Apache 2.0Why this server?
Finds settings that break when public TLS certificates fall to 100 days, including openssl -days usage.
FlicenseAqualityAmaintenance40 regulation-and-deadline linters (CRA/CSAF, PCI DSS 6.4.3, WCAG 2.1 AA, DORA, NIS2, EU AI Act, KSeF, NF-e) that AI agents call over MCP. Free checks on the open file; licence key unlocks workspace scan and CI exit code.3-Why this server?
Supports secure TLS configuration and authentication token generation for the MCP server's secure communication channels.
Why this server?
Manages TLS certificates, certificate lifecycle, and cryptographic tasks using OpenSSL.
AlicenseNot gradedqualityDmaintenanceThis is a Linux OS hardening tool. Take a fresh install and immediately harden the heck out of it using just your favourite LLM agent and natural language prompts. "Make my system secure" or "Do a full security audit of my system."19 npm1MITWhy this server?
Allows interception of TLS traffic in applications using OpenSSL, capturing plaintext data before encryption and after decryption for network analysis.
AlicenseNot gradedqualityCmaintenanceMCP server for attaching Frida-based network/traffic interceptors (TCP/UDP/TLS) to any application. Enables intercepting plaintext TLS traffic, listing processes, attaching hooks, and searching captured payloads via 15 MCP tools.GPL 3.0Why this server?
Supports auditing OpenSSL packages (e.g. openssl 3.0.2 amd64) as part of a Linux/Ubuntu package audit to determine which known vulnerabilities apply to that version.

Vulners MCP Serverofficial
FlicenseNot gradedqualityBmaintenanceEnables AI assistants to query the Vulners vulnerability database for CVEs, security bulletins, and software package audits through natural language.149 PyPI7-Why this server?
Leverages OpenSSL for TLS certificate analysis when available, falling back to Python cryptography library if needed.
AlicenseNot gradedqualityDmaintenanceProvides a unified tool for TLS certificate analysis with automatic OpenSSL integration, allowing users to fetch, analyze and assess security of TLS certificates without manual PEM handling.2MITWhy this server?
Provides SSL/TLS certificate analysis including validation, expiration checks, cipher strength analysis, and protocol security assessment
AlicenseNot gradedqualityDmaintenanceEnables AI assistants to perform authorized security testing and penetration testing operations including SSL/TLS analysis, port scanning, vulnerability scanning, and HTTP security header audits through natural language interactions.1MITWhy this server?
Used for generating private and public key pairs for MCP authentication
AlicenseNot gradedqualityNot gradedmaintenanceA Model Context Protocol server that provides access to Observe API functionality, enabling LLMs to execute OPAL queries, manage datasets/monitors, and leverage vector search for documentation and troubleshooting runbooks.1-