Clean slugs and better-ranking texts

For in-house CMSs and writing tools: a slug without accents or exotic characters, the keywords that stand out, the length of your tags.

Custom CMSs
Writing tools
Multilingual blogs

Get a free key

POST

/v1/seo/analyze

1 credit(s) per call

Generates a slug and analyses title, description, keywords, density, reading time and readability.

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Result

—

Example request

curl -X POST https://supercalcula.ch/api/v1/seo/analyze \
  -H "Authorization: Bearer sk_live_…" \
  -H "Content-Type: application/json" \
  -d '{"title":"Comment créer un QR code avec logo en 2026","text":"Un QR code avec logo…","lang":"fr"}'

const res = await fetch("https://supercalcula.ch/api/v1/seo/analyze", {
  method: "POST",
  headers: { Authorization: "Bearer sk_live_…", "Content-Type": "application/json" },
  body: JSON.stringify({
    "title": "Comment créer un QR code avec logo en 2026",
    "text": "Un QR code avec logo…",
    "lang": "fr"
}),
});
const data = await res.json();

import requests
r = requests.post("https://supercalcula.ch/api/v1/seo/analyze",
    headers={"Authorization": "Bearer sk_live_…"},
    json={"title":"Comment créer un QR code avec logo en 2026","text":"Un QR code avec logo…","lang":"fr"})
print(r.json())

$ch = curl_init("https://supercalcula.ch/api/v1/seo/analyze");
curl_setopt_array($ch, [
  CURLOPT_POST => true,
  CURLOPT_HTTPHEADER => ["Authorization: Bearer sk_live_…", "Content-Type: application/json"],
  CURLOPT_POSTFIELDS => json_encode(["title" => "Comment créer un QR code avec logo en 2026", "text" => "Un QR code avec logo…", "lang" => "fr"]),
  CURLOPT_RETURNTRANSFER => true,
]);
$result = json_decode(curl_exec($ch), true);

Response

{
    "ok": true,
    "data": {
        "slug": "comment-creer-un-qr-code-avec-logo-en-2026",
        "title": {
            "length": 42,
            "verdict": "ok"
        },
        "description": {
            "length": 0,
            "verdict": "missing"
        },
        "keywords": [
            {
                "term": "qr code",
                "count": 12,
                "density": 2.1
            },
            {
                "term": "logo",
                "count": 7,
                "density": 1.2
            }
        ],
        "word_count": 570,
        "reading_time_min": 3,
        "readability": {
            "score": 62,
            "level": "standard"
        }
    }
}

Limits and cost

Cost : 1 credit(s) per call
Text: 200,000 characters at most
Languages: French, German, English
Readability: Kandel-Moles (FR), Amstad (DE) and Flesch (EN) formulas

Full reference in the documentation →