Hook & Virality Scorer

Hook & Virality Scorer

Score a title, hook, or opening line for scroll-stopping power and get back a 0-100 number with a letter grade. It's built for short-form creators and copywriters who are sitting on five title ideas and want a fast, repeatable way to pick one instead of arguing about it. Pass a batch of variants and it ranks them best-first.

How it works

It runs a deterministic rule pass over the text. It counts curiosity phrases, emotion and high-stakes words, power words, numbers, questions, and "you"/"I" framing, then scores six weighted dimensions and applies penalties for filler and excess ALL-CAPS. No AI, no API calls, so the same input always returns the same score.

Input

You don't have to set anything beyond the text. Pass text for one string or texts for a batch.

At least one of text or texts must resolve to a non-empty string, otherwise the run fails.

Output

One dataset item per scored hook. Each item has the score (0-100), grade (A through F), and the original text, plus a breakdown object with the per-dimension points (curiosity, emotion, powerWords, specificity, relatability, length), a signals object listing exactly what it matched (word count, numbers, questions, the specific power/curiosity/emotion/filler words found), and a suggestions array of concrete rewrites for whatever scored low. When ranking is on, items also carry a rank.

Example

{
  "texts": [
    "I tried the viral 5am routine for 30 days",
    "You won't believe what happened when I confronted my MIL",
    "My morning routine"
  ],
  "type": "auto",
  "rankResults": true
}

Pricing

$0.003 per hook scored — $3.00 per 1,000 — plus a $0.0000125 run-start fee each time a run begins. Flat rate: no volume tiers, no plan gates, no subscription, and you are charged only for hooks actually scored.

There is no AI key to buy and no third-party API bill behind it, so the number above is the whole cost. Scoring 20 title variants in one batch run costs $0.06 plus the fraction-of-a-cent start fee.

Notes

The scoring is keyword and pattern based and tuned for English. It rewards the usual viral signals (open loops, stakes, specificity), so treat it as a fast first-pass filter and A/B comparison tool, not a guarantee that a high-scoring hook will actually go viral.