NestJS Profanity Filter

Wrap the API in an injectable NestJS service so moderation is testable and reusable across controllers.

Quick start in NestJS

@Injectable()
export class ModerationService {
  async check(text: string) {
    const r = await fetch("https://api.theprofanityapi.com/v1/check", {
      method: "POST",
      headers: {
        Authorization: `Bearer ${process.env.PROFANITY_API_KEY}`,
        "Content-Type": "application/json",
      },
      body: JSON.stringify({ text, context: "comment", mode: "balanced" }),
    });
    return r.json();
  }
}

Why context-aware matters

A plain word list flags "this game is sick" or medical text full of anatomical terms. The Profanity API runs a five-layer pipeline that scores intent, so "die" in a gaming taunt and "die" in a real threat are handled differently. Pick a context and the engine adjusts strictness automatically.

Other integrations

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