StackOneHQ/defender
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.
Platform-specific configuration:
{
"mcpServers": {
"defender": {
"command": "npx",
"args": [
"-y",
"defender"
]
}
}
}Add the config above to .claude/settings.json under the mcpServers key.
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