Defender
github.com/stackonehq/defender- Category
- Cybersecurity
- Pricing
- Open Source
- Type
- TOOL
- GitHub
- 121 stars
- Latest release
- defender-v0.8.2
- Date
About
Defender is an open-source library that detects and blocks indirect prompt injection attacks against AI agents making tool calls through MCP, CLI, or direct function calling. It runs as a lightweight, CPU-only model (22MB) with under 10ms latency, letting agent systems screen tool inputs and outputs for injected instructions before acting on them.
Intel on Defender
Tags
prompt-injectionai-securityai-agentsmcpllm-securityopen-source
Tech Stack
Node.jsTypeScript
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