API / Getting started
API pricing
Pay for the products you request from a prepaid API balance. All amounts are in USD.
AI detection
$0.02 per 100 words, rounded up to the next block, with a 1,000-word minimum charge.
| Document length | Billed words | Cost |
|---|---|---|
| 300 words | 1,000 | $0.20 |
| 1,240 words | 1,300 | $0.26 |
| 3,000 words | 3,000 | $0.60 |
Minimum input: 125 words. AI billing starts at 1,000 words.
Turnitin similarity
$1.25 per document, independent of word count. Includes the structured similarity result and Turnitin PDF when the check succeeds.
Charges and refunds
Combined checks are charged separately for each product. A product that fails to produce a report is refunded. Your usage ledger records charges, refunds, and top-ups, and GET /balance returns current prices.
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