> For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/guardrails/_mcp/server. # Guardrail Catalog > Reference for pre-built guardrails including content safety, jailbreak detection, topic control, PII handling, agentic security, and third-party APIs. The NeMo Guardrails library ships with a catalog of pre-built guardrails that you can activate out of the box. These guardrails span the most common safety and security concerns in LLM-powered applications from blocking harmful content and detecting jailbreak attempts to masking personally identifiable information and grounding responses in evidence. Each guardrail is implemented as a configurable rail flow that you add to the `input`, `output`, or `retrieval` section of your `config.yml`. You can use NVIDIA-trained safety models, open-source community models, LLM self-check prompts, or third-party managed APIs, and combine multiple approaches for defense in depth. Browse the catalog below to find the guardrail that fits your use case. #### [Content Safety](/configure-guardrails/guardrail-catalog/content-safety) Reference for pre-built content safety guardrails for protecting against violence, criminal activity, hate speech, sexually explicit content, and similar areas. Reference #### [Jailbreak Protection](/configure-guardrails/guardrail-catalog/jailbreak-protection) Reference for jailbreak protection guardrails that help prevent adversarial attempts from bypassing safety measures. Reference #### [Topic Control](/configure-guardrails/guardrail-catalog/topic-control) Reference for topic control guardrails that ensure conversations stay within predefined subject boundaries. Reference #### [PII Detection](/configure-guardrails/guardrail-catalog/pii-detection) Reference for PII detection guardrails that protect user privacy by detecting and masking sensitive data. Reference #### [Agentic Security](/configure-guardrails/guardrail-catalog/agentic-security) Reference for agentic security guardrails that protect LLM-based agents using tools and interacting with external systems. Reference #### [Tool Calling](/configure-guardrails/guardrail-catalog/tool-calling) Reference for IORails tool-calling rails that validate model-emitted tool calls and application-returned tool results. Reference #### [Hallucinations & Fact-Checking](/configure-guardrails/guardrail-catalog/fact-checking) Reference for fact-checking and hallucination detection guardrails that ensure LLM output is grounded in evidence. Reference #### [LLM Self-Check](/configure-guardrails/guardrail-catalog/self-check) Reference for LLM self-checking guardrails that prompt the LLM to perform input checking, output checking, or fact-checking. Reference #### [Third-Party APIs](/configure-guardrails/guardrail-catalog/third-party) Reference for third-party API integrations that connect with managed services for guardrail use cases. Reference > Reference for pre-built guardrails including content safety, jailbreak detection, topic control, PII handling, agentic security, and third-party APIs. ## Docs - [Content Safety](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/content-safety.md): Reference for pre-built content safety guardrails for protecting against violence, criminal activity, hate speech, sexually explicit content, and similar areas. - [Jailbreak Protection](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/jailbreak-protection.md): Reference for jailbreak protection guardrails that help prevent adversarial attempts from bypassing safety measures. - [Topic Control](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/topic-control.md): Reference for topic control guardrails that ensure conversations stay within predefined subject boundaries. - [PII Detection](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/pii-detection.md): Reference for PII detection guardrails that protect user privacy by detecting and masking sensitive data. - [Agentic Security](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/agentic-security.md): Reference for agentic security guardrails that protect LLM-based agents using tools and interacting with external systems. - [Tool Calling](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/tool-calling.md): Validate model-emitted tool calls and application-returned tool results with the IORails tool-calling rails. - [Hallucinations & Fact-Checking](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/fact-checking.md): Reference for fact-checking and hallucination detection guardrails that ensure LLM output is grounded in evidence. - [LLM Self-Check](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/self-check.md): Reference for LLM self-checking guardrails that prompt the LLM to perform input checking, output checking, or fact-checking. - [Third-Party APIs](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party.md): Reference for third-party API integrations that connect with managed services for guardrail use cases. - [ActiveFence Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/active-fence.md) - [AlignScore Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/alignscore.md) - [AutoAlign Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/auto-align.md) - [Cisco AI Defense Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/ai-defense.md) - [Clavata Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/clavata.md) - [Cleanlab Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/cleanlab.md) - [CrowdStrike AIDR integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/crowdstrike-aidr.md) - [F5 Guardrails Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/f5-ai-guardrails.md) - [Fiddler Guardrails Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/fiddler.md) - [GCP Text Moderation Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/gcp-text-moderations.md) - [GLiNER Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/gliner.md) - [GuardrailsAI Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/guardrails-ai.md) - [HuggingFace Classifier Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/hf-classifier.md) - [Llama-Guard Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/llama-guard.md) - [Pangea AI Guard integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/pangea.md) - [Patronus Evaluate API Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/patronus-evaluate-api.md) - [Patronus Lynx Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/patronus-lynx.md) - [PolicyAI Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/policyai.md) - [Polygraf Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/polygraf.md) - [Presidio Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/presidio.md) - [Private AI Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/privateai.md) - [Prompt Security Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/prompt-security.md) - [Regular Expression Detection Integration](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/regex.md) - [Trend Micro Vision One AI Application Security](https://docs.nvidia.com/nemo/guardrails/v0.24.0/configure-guardrails/guardrail-catalog/third-party/trend-micro.md)