What is CoverCrushing?

CoverCrushing is a book cover testing platform that puts your cover designs in front of 500–1,000 genre-matched readers who vote, rate, and tell you exactly which design they would click — before you launch.

How much does a cover test cost?

First Crush is $5 for your first paid test, then $12. Hard Crush is $29 and Crush It is $59. You can test 2–4 cover variants and receive your full analytics report including Crush Score, vote breakdown, purchase intent data, and AI recommendations within 48 hours.

How long does it take to get results?

Most tests are completed within 48 hours. You receive a full analytics report with your Crush Score, demographic breakdown, and actionable recommendations as soon as voting closes.

Who votes on my cover?

Real genre-matched readers vote on your cover. Voters select their preferred genres during onboarding, so your thriller cover is seen by thriller readers, your romance cover by romance readers, and so on.

Developer API

CoverCrushing API

Integrate cover testing directly into your publishing workflow. Submit tests, retrieve results, and receive webhook callbacks — all via REST API.

Simple REST API

Submit a test with a single POST request. Results arrive via webhook or polling.

Secure & reliable

Bearer token auth, HTTPS only, 99.9% uptime SLA on Publisher and Enterprise plans.

Structured JSON

All results returned as clean JSON — vote counts, Crush Scores, demographic breakdowns.

Submit a test in one request

Terminal

curl -X POST https://api.covercrushing.com/v1/tests \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "genre": "romance",
    "covers": [
      { "label": "Cover A", "url": "https://your-cdn.com/cover-a.jpg" },
      { "label": "Cover B", "url": "https://your-cdn.com/cover-b.jpg" }
    ],
    "voter_count": 500,
    "webhook_url": "https://your-app.com/webhooks/covercrush"
  }'

Available Endpoints

POST/v1/testsSubmit a new cover test with 2–4 cover image URLs.

GET/v1/tests/:idRetrieve the status and results of a test by ID.

GET/v1/testsList all tests for your account with pagination.

GET/v1/genresList all supported genres for reader targeting.

POST/v1/webhooksRegister a webhook URL to receive results when a test completes.

API Plans

Starter API

$49/mo

50 tests/month

REST API access
500 voters per test
JSON results
Email support

Publisher API

$199/mo

250 tests/month

Everything in Starter
1,000 voters per test
Webhook callbacks
Priority support
Bulk submission endpoint

Enterprise

Custom

Unlimited

Everything in Publisher
Custom voter counts
SLA guarantee
Dedicated account manager
White-label results

Built for publishers, tools, and platforms

Publishing houses

Submit all cover variants for a title in one API call. Receive structured results for editorial review.

Cover design tools

Integrate CoverCrushing into your design workflow. Let designers test directly from their tool.

Author service platforms

Offer cover testing as a value-add to your author community without building the infrastructure.

Marketing automation

Trigger a cover test automatically when a new title enters production. Receive results via webhook.