n8n enterprise AI security firewall — guardrails for secure agents

n8n Guardrails: Risk Ranking This workflow provides a complete testing rig for evaluating text against seven essential AI guardrails used in production systems. It helps you detect jailbreak attempts, PII exposure, NSFW content, secret key leaks, malicious URLs, topical misalignment, and keyword violations. Use the included Google Sheet or CSV to batch-test multiple inputs instantly. --- ## How It Works (Internal Workflow Overview) 1. Load Input Rows The workflow reads each test entry (GuardrailType + InputText) from a Google Sheet or CSV. 2. Route to the Correct Guardrail A Switch node sends the text to the appropriate guardrail: - Jailbreak - PII - Secret Keys - NSFW - URLs - Topical Alignment - Keywords 3. AI Guardrail Evaluation Each guardrail uses Google Gemini to return: - Pass / Fail - Confidence score - Reasoning - Extracted PII, URLs, or entities (when relevant) 4. Optional Sanitization Layer Three sanitizers demonstrate how to clean unsafe text: - PII Sanitization - Secret Key Sanitization - URL Sanitization 5. Review Results Each guardrail node outputs clean JSON, making debugging fast and transparent. --- ## How to Set Up 1. Load the Test Dataset Use either: - The included CSV file - The linked Google Sheet Update only: - Document ID - Sheet name --- 2. Add Google Sheets Credentials Create an OAuth2 credential → paste the Google JSON → connect your account. --- 3. Add Google Gemini Credential Go to Credentials → Google Gemini (PaLM API) → Paste your API key → attach it to all Guardrail nodes. --- 4. Review Sticky Notes They visually explain: - What each guardrail checks - Why the check is important - Risk scoring and impact --- 5. Run the Workflow Click Execute Workflow and inspect: - Each guardrail node’s output - The full execution data --- ## Requirements - n8n (latest version recommended) - Google Gemini API key - Google Sheets API access - Test dataset: n8n Guardrails test data.csv --- ## Test Data Included The included dataset allows instant testing: - Jailbreak prompts - PII samples - API key leaks - NSFW text - Malicious URL examples - Off-topic content - Keyword triggers --- ## Template Metadata Template Author: Sandeep Patharkar Category: AI Safety / Agent Security Difficulty: Intermediate Estimated Setup Time: 10–15 minutes Tags: Guardrails, AI Agents, Safety, Enterprise --- ## Connect With Me Author: Sandeep Patharkar 🔗 LinkedIn: 🏠 Skool AIC+: