How to Block Competitor Mentions in ChatGPT API Responses

import OpenAI from "openai";

// Scenario: User asks comparison question
const userQuestion = "Is Uber cheaper than your service?";

// ❌ WITHOUT OUTPUT GUARD: Risky
const unsafeClient = new OpenAI({
  apiKey: process.env.OPENAI_API_KEY
});

const riskyResponse = await unsafeClient.chat.completions.create({
  model: "gpt-4o",
  messages: [{
    role: "system",
    content: "You are a customer support agent. Do not mention competitors."
  }, {
    role: "user",
    content: userQuestion
  }]
});
// 🚨 GPT-4o might ignore the instruction and say:
// "Uber typically charges 15-20% less for short trips..."

// ✅ WITH SAFEPIPE OUTPUT GUARD: Guaranteed
const safeClient = new OpenAI({
  apiKey: process.env.SAFEPIPE_API_KEY,
  baseURL: "https://safepipe.eu/api/v1",
  defaultHeaders: {
    "x-provider-key": process.env.OPENAI_API_KEY
  }
});

// Configure competitor blocklist in SafePipe Dashboard:
// Settings → Output Guard → Competitor List: ["Uber", "Lyft", "Competitor Inc"]

const safeResponse = await safeClient.chat.completions.create({
  model: "gpt-4o",
  messages: [{
    role: "user",
    content: userQuestion
  }]
});

// If GPT-4o mentions "Uber", SafePipe:
// 1. REDACT mode: Replaces "Uber" with "[REDACTED]"
// 2. BLOCK mode: Returns HTTP 400 with error "Competitor mention detected"

// You can also get violation details in response headers:
// X-SafePipe-Violation: competitor_block
// X-SafePipe-Count: 1