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106,327 servers. Updated
20 Best PDF MCP Servers: compared and ranked, October 2026Ranked from 1,892 matching servers on stars, growth, downloads and maintenance. Updated .

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  • A
    license
    Not graded
    quality
    B
    maintenance
    MCP server that detects and guards against tool poisoning and prompt injection attacks in tool descriptions and schemas. It provides risk scoring, pattern detection, safe rewriting, and audit reports with zero external API cost.
    MIT
  • A
    license
    A
    quality
    A
    maintenance
    Enables LLM agents to browse and triage vulnerability observations, manage products, branches and rules, import scan reports and SBOMs, run scans and background jobs, and generate VEX documents via SecObserve's REST API.
    18
    143 PyPI
    1
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    Agent-native "safe to ship?" security gate for AI-generated code. Uses real parsers and inter-rocedural taint analysis (JS/TS, Python, Go) to flag the classes AI coding agents get wrong — secrets, SQL injection, SS, SSRF, path traversal, command injection, weak JWT/CORS — and ranks findings by confidence. Exposes a scan tool over MCP.
    1
    2 npm
    2
    MIT
  • A
    license
    A
    quality
    A
    maintenance
    MCP security firewall (stdio): vet advertised tool definitions through static-scan → threat-feed → origin → pinning before they reach the model. Zero npm runtime deps. No secrets.
    9
    825 npm
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    Open behavioral litmus for MCP servers — grades A–F across tool-output injection, egress, sensitive-data, and adversarial-input, with reproducible, content-addressed evidence. Tools: run_litmus, verify_attestation.
    4
    68 npm
    8
    Apache 2.0
  • F
    license
    A
    quality
    C
    maintenance
    Provides a generic HTTP client tool allowing AI agents to make arbitrary HTTP requests from their environment, with support for environment-variable placeholders for secrets.
    1
    -
  • A
    license
    A
    quality
    D
    maintenance
    MCP server that enables Claude Code to drive the Konsulto cybersecurity audit platform from the CLI, including reading and writing findings, managing evidence, and handling scope and assets.
    19
    4 npm
    1
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    A production-ready MCP server that wraps Nmap to enable AI agents to perform automated network security assessments, including port scanning, host discovery, service detection, OS fingerprinting, and vulnerability scanning.
    6
    17
    Apache 2.0
  • A
    license
    A
    quality
    A
    maintenance
    SkillTotal is a local stdio MCP server that lets an agent check a component before installing it. It statically analyzes MCP servers, agent skills, npm/PyPI packages and repos for supply-chain risks, dangerous capabilities (shell, filesystem, network, credentials), prompt-injection surfaces like tool poisoning, and exfiltration paths. Each finding cites file, line and snippet.
    4
    3
    2,282 PyPI
    13
    Apache 2.0
  • A
    license
    A
    quality
    F
    maintenance
    Provides Claude Code with access to a comprehensive bug bounty knowledge base including techniques, payloads, wordlists, and real-world reports through 14 tools for searching, retrieving payloads, and assessing report quality.
    14
    21
    GPL 3.0
  • A
    license
    A
    quality
    B
    maintenance
    Enables AI assistants to scan websites, public repositories, and OpenClaw/CLAW skills for security vulnerabilities, including local skill-package analysis before installation, cloud scans, and remediation guidance.
    10
    20 npm
    MIT
  • A
    license
    A
    quality
    A
    maintenance
    Enables agents and CI pipelines to audit MCP servers and agent tool-chains by statically scanning repositories, local checkouts, tools/list exports, or live endpoints for risks such as destructive actions without confirmation, mismatched safety annotations, injection surfaces, credential or PII exposure, and unguarded command, path, or URL sinks. All checks are read-only and never execute the scanned code or call tools/call.
    3
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    Enables users to retrieve and display CVE vulnerability information from the National Vulnerability Database (NVD) with support for keyword search and detailed lookup.
    2
    32 npm
    4
    MIT
  • A
    license
    A
    quality
    C
    maintenance
    Enables Claude to scan a website's HTTP security headers and receive an A–F grade against OWASP best practices, including per-header pass/warn/fail results and copy-paste fixes for missing headers.
    1
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    Scans MCP servers for prompt-injection, tool-poisoning, and SSRF vulnerabilities using 30+ canonical rules across 5 severity tiers, with optional signed safety reports for procurement.
    5
    MIT