defender — MCP Server by StackOneHQ

by StackOneHQ · MCP Server · ★ 106

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

About defender

<img src="https://img.shields.io/badge/model-22MB-047B43

ai-securityindirect-prompt-injectionllm-securitymcp-securityprompt-injectionprompt-injection-defenseprompt-injection-detectionprompt-injection-protection

Quick Facts

Stars106
Forks10
LanguageTypeScript
CategoryMCP Server
LicenseApache-2.0
Quality Score39.9/100
Open Issues2
Last Updated2026-06-11
Created2026-02-13
Platformscli, mcp, node
Est. Tokens~5678k

Compatible Skills

These tools work well together with defender for enhanced workflows:

  • openguardrails — semantic(0.45)+complementary+rare_topics+same_lang+similar_pop+shared_platform (65%)

defender alternative? Top 6 similar tools

Looking for a defender alternative? If you're comparing defender with other mcp server tools, these 6 projects are the closest alternatives on Agent Skills Hub — ranked by topic overlap, star count, and community traction.

  • agentseal by AgentSeal · ⭐ 156

    Security toolkit for AI agents. Scan your machine for dangerous skills and MCP configs, monitor for supply cha

  • shellward by jnMetaCode · ⭐ 112

    AI Agent Security Middleware — 8-layer defense, DLP data flow, prompt injection detection, zero dependencies.

  • agent-threat-rules by Agent-Threat-Rule · ⭐ 97

    Open detection standard for AI agent threats. Like Sigma, but for prompt injection, tool poisoning, and MCP at

  • LLMSecurityGuide by requie · ⭐ 61

    A comprehensive reference for securing Large Language Models (LLMs). Covers OWASP GenAI Top-10 risks, prompt i

  • pipelock by luckyPipewrench · ⭐ 342

    Firewall for AI agents. DLP scanning, SSRF protection, bidirectional MCP scanning, tool poisoning detection, a

  • claude-code-organizer by mcpware · ⭐ 283

    Dashboard to manage Claude Code memories, configs, and MCP servers — security scanner for tool poisoning, cont

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Frequently Asked Questions

What is defender?

defender is Open source prompt injection protection for Agents calling tools (via MCP, CLI or direct function calling). Detect and defend against prompt injection attacks. 22MB, CPU-only, < 10ms latency.. It is categorized as a MCP Server with 106 GitHub stars.

What programming language is defender written in?

defender is primarily written in TypeScript. It covers topics such as ai-security, indirect-prompt-injection, llm-security.

How do I install or use defender?

You can find installation instructions and usage details in the defender GitHub repository at github.com/StackOneHQ/defender. The project has 106 stars and 10 forks, indicating an active community.

What license does defender use?

defender is released under the Apache-2.0 license, making it free to use and modify according to the license terms.

What are the best alternatives to defender?

The top alternatives to defender on Agent Skills Hub include agentseal, shellward, agent-threat-rules. Each offers a different approach to the same problem space — compare them side-by-side by stars, quality score, and community activity.

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