HOL Guard
Local runtime control for AI coding agents such as Claude Code, Codex and Cursor that checks shell commands, secret access, MCP calls and package installs before they run. Free and open source under Apache-2.0, installed with pipx, with an optional paid Guard Cloud add-on.
More in Security & Guardrails
NVIDIA NeMo Guardrails
Toolkit for adding programmable guardrails to LLM apps.
Guardrails AI
Validators and structured output guardrails for LLMs.
Llama Guard
Meta's safety classifier models and Purple Llama tools.
LLM Guard
Toolkit for sanitizing and securing LLM interactions.
| Category | Security & Guardrails |
|---|---|
| Authentication | No auth |
| Pricing | Free tier |
| Source | Open Source |
| Website | https://hol.org/guard |
| Docs | https://hol.org/guard/docs |
| Last checked | 2026-10-14 |
| As JSON | /api/v1/directory/hol-guard.json |