Credits

How Credits Work

Most endpoints consume credits based on the word count of the input text.

1 credit = 1 word

Three services price differently: the Plagiarism Checker charges a flat 2 credits per scan regardless of text length, the AI Voice Detector charges 10 credits per second of audio (see Voice Detection Pricing below), and the Image Detector is priced by image resolution (see Image Detection Pricing below).

Credits are one shared pool across all services.

Word-based charges use a script-aware count (whitespace-separated words; one word per character for CJK scripts). Failed requests are refunded automatically.

Voice Detection Pricing

The AI Voice Detector charges credits based on the audio's duration:

credits = ceil(duration_in_seconds) × 10

The duration is rounded up to the whole second, with a minimum of 1 second (10 credits). At the maximum length of 10 minutes, a scan costs 6,000 credits. The exact amount is returned as credits_used in every successful response.

Image Detection Pricing

The Image Detector is priced by image resolution (megapixels), not word count:

tokens  = 197 + 50 × megapixels
credits = max(6, round(tokens / 36.5))

Each image costs at least 6 credits. Images larger than 4K UHD (3840 × 2160, ≈8.3 MP) are virtually downscaled before pricing, capping the charge at 17 credits. The exact amount is returned as credits_charged in every successful response.

Checking Your Balance

Every successful API response includes a credits_remaining field showing your current balance after the request.

{
  "status": "success",
  "result": "...",
  "credits_remaining": 1482
}

Plans

Credits reset monthly on your billing cycle. Unused credits do not roll over.

Free Trial

New accounts start with a free trial — no credit card required.

• 2,000 credits included.
• 5 days to use them.
• Once the trial expires or credits run out, upgrade to a paid plan to continue using the API.

Insufficient Credits

If your credit balance is lower than the word count of the submitted text, the request is rejected with 403:

{
  "error": "Insufficient credits",
  "code": "insufficient_credits",
  "details": {
    "credits": 50,
    "required": 120
  }
}

Credits Exhausted (Paid Plan)

If your monthly credits are fully used, requests return 403 until the next billing cycle:

{
  "error": "Credits exhausted. Credits reset on next billing cycle.",
  "code": "credits_exhausted",
  "details": {
    "plan": "1M",
    "credits": 0
  }
}

Trial Expired

If your trial period has ended, requests return 403:

{
  "error": "Trial expired, please subscribe",
  "code": "trial_expired"
}

Credit Usage for Combined Endpoints

The Detect & Humanize endpoint charges credits once for the full word count, regardless of whether humanization is performed.