Amazon DE Compliance API Integration: Deterministic Listing Validation

Why a Separate Compliance Layer

A general-purpose machine translation call returns a string. It does not run any marketplace-specific rules. Two common failure modes that cause Amazon DE listings to be suppressed or have items suspended:

• Prohibited terms introduced during translation. The German word garantiert can appear in a fluent translation of an English sentence that makes a performance claim. Amazon DE flags this term and suppresses the listing regardless of context.
• Hard facts silently altered. Model numbers, voltages, and units may be reformatted or dropped by a translation model. A corrupted model number does not cause an obvious translation error — the text reads naturally — but the listing is inaccurate and may be rejected.

The ListLoco compliance API addresses both by running five deterministic gates against every localized output before returning a result.

What the 5 Gates Check

• Banned words. Scans the localized title, description, and bullet points against Amazon DE's list of restricted terms (e.g. garantiert, antibakteriell, Wundermittel). Any match is reported as a violation.
• GPSR required info. Checks that product safety fields mandated by EU GPSR (Regulation (EU) 2023/988) are present in the structured output — manufacturer information, EU Responsible Person contact, and safety warnings where applicable.
• Title character limit. Verifies that the localized title does not exceed Amazon DE's 200-character limit. The gate reports the actual character count alongside the limit so your integration can handle truncation logic if needed.
• Model number and unit preservation. Extracts every numeric token, model number pattern, and unit from the source text and confirms each one is present verbatim in the localized output. A missing or altered token is flagged as a preservation failure regardless of the back-translation score.
• Back-translation divergence. Round-trips the German output back to English and measures lexical divergence from the source. Output that exceeds the configured threshold is flagged. This gate runs independently of the preservation check — both must pass.

Quick-Start: API Integration

All examples below use the RapidAPI endpoint. Replace YOUR_RAPIDAPI_KEY with the key from your RapidAPI dashboard. See the full code examples page for additional request formats and edge cases.

curl -X POST https://listloco.p.rapidapi.com/localize \
  -H "Content-Type: application/json" \
  -H "X-RapidAPI-Host: listloco.p.rapidapi.com" \
  -H "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY" \
  -d '{
    "marketplace": "amazon",
    "sourceLang": "en",
    "targetLang": "de",
    "listing": {
      "title": "Cordless Drill AB-2400, 18V, 2 Batteries Included",
      "description": "Professional-grade cordless drill with variable speed.",
      "brand": "Makita",
      "material": "Metal",
      "size": "Standard",
      "color": "Blue",
      "quantity": 1
    },
    "glossary": {},
    "dictionary": {}
  }'

import requests

# Replace with your key from https://rapidapi.com/sakaiwork259601/api/listloco
RAPIDAPI_KEY = "YOUR_RAPIDAPI_KEY"

payload = {
    "marketplace": "amazon",
    "sourceLang": "en",
    "targetLang": "de",
    "listing": {
        "title": "Cordless Drill AB-2400, 18V, 2 Batteries Included",
        "description": "Professional-grade cordless drill with variable speed.",
        "brand": "Makita",
        "material": "Metal",
        "size": "Standard",
        "color": "Blue",
        "quantity": 1,
    },
    "glossary": {},
    "dictionary": {},
}

response = requests.post(
    "https://listloco.p.rapidapi.com/localize",
    json=payload,
    headers={
        "Content-Type": "application/json",
        "X-RapidAPI-Host": "listloco.p.rapidapi.com",
        "X-RapidAPI-Key": RAPIDAPI_KEY,
    },
)

data = response.json()
print("Pass:", data["pass"])
print("Violations:", data["violations"])
print("Localized title:", data["localized"]["title"])
print("Quota remaining:", data.get("quota_remaining"))

// Replace with your key from https://rapidapi.com/sakaiwork259601/api/listloco
const RAPIDAPI_KEY = "YOUR_RAPIDAPI_KEY";

const payload = {
  marketplace: "amazon",
  sourceLang: "en",
  targetLang: "de",
  listing: {
    title: "Cordless Drill AB-2400, 18V, 2 Batteries Included",
    description: "Professional-grade cordless drill with variable speed.",
    brand: "Makita",
    material: "Metal",
    size: "Standard",
    color: "Blue",
    quantity: 1,
  },
  glossary: {},
  dictionary: {},
};

const res = await fetch("https://listloco.p.rapidapi.com/localize", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-RapidAPI-Host": "listloco.p.rapidapi.com",
    "X-RapidAPI-Key": RAPIDAPI_KEY,
  },
  body: JSON.stringify(payload),
});

const data = await res.json();
console.log("Pass:", data.pass);
console.log("Violations:", data.violations);
console.log("Localized title:", data.localized.title);
console.log("Quota remaining:", data.quota_remaining);

Response Structure

A successful POST /localize response is a JSON object with the following top-level fields:

{
  "localized": {
    "title": "Akku-Bohrschrauber AB-2400, 18 V, 2 Akkus im Lieferumfang",
    "description": "Professioneller Akku-Bohrschrauber mit variabler Drehzahl.",
    "brand": "Makita",
    "material": "Metall",
    "size": "Standard",
    "color": "Blau",
    "quantity": 1
  },
  "gates": {
    "titleLength":        { "pass": true,  "length": 57, "limit": 200 },
    "bannedWords":        { "pass": true  },
    "requiredAttributes": { "pass": true  },
    "preservation":       { "pass": true  },
    "backTranslation":    { "pass": true,  "enforced": true, "score": 0.07 }
  },
  "violations": [],
  "pass": true,
  "quota_remaining": 48
}

• localized — the structured German output with all listing fields.
• gates — one entry per compliance gate, each with a pass boolean and gate-specific detail fields (length/limit for title length; score/enforced for back-translation; matched terms for banned words).
• violations — an array of structured violation objects when one or more gates fail. Each entry includes the gate name, the specific term or token that failed, and a human-readable reason.
• pass — true when all gates pass; false when any gate has a violation. Use this as the primary signal in your integration logic.
• quota_remaining — requests remaining in the current billing period under your RapidAPI plan. Poll this field to handle rate-limit logic before a QUOTA_EXCEEDED error occurs.

Integrating with Your Own Translation Layer

If you already use DeepL, OpenAI, or another translation service in your pipeline, you can route the output through the ListLoco compliance gates as a separate validation step. The API accepts any localized listing string — it does not require that the translation was produced by a specific provider.

The preservation gate extracts numeric tokens and model number patterns from the original source field before comparing them against the localized output. Pass the original English string in listing.title (and other fields) alongside the already-translated German text by overriding the translation step in your integration — see the examples page for a worked pattern.

Preventing Listing Suppression and Suspension

Amazon DE may suppress a listing — removing it from search results without fully removing the ASIN — when a rule violation is detected after submission. In more severe cases, repeated or deliberate violations can lead to the listing being suspended. The compliance gates in the ListLoco API are designed to surface these violations at the API level, before submission, so your integration can handle them programmatically: block the submission, surface the violation to a human reviewer, or trigger a corrective re-translation step.

For background on the most common suppression causes on Amazon Germany, see:

• Fix Amazon DE suppressed listings — common suppression causes and how to detect them programmatically.
• Amazon DE banned keywords that block listings — a breakdown of restricted term categories and automated detection.
• Free Amazon DE Listing Checker — run a quick compliance check directly in the browser.

Frequently Asked Questions

Related articles: DeepL and Google Translate for Amazon DE listings: compliance gaps explained · Back-translation quality gate for Amazon DE · Machine translation vs. compliance-first localization