AI Detector API
For products that need AI writing signals and sentence-level detector output.
$15per month
100,000 detector words
- AI Detector REST endpoint
- detect_ai_text MCP tool
- Detector v1, v2, and v3
- Feature-specific word balance
Developer plans
Straightforward API pricing, starting at $15 a month
Choose one API or put all three into the same subscription. Every plan uses input words as its usage unit, so estimates map to the text your product actually sends.
Single-product plans
Pay for the workflow you are building now
Each plan starts with one product and one clear balance. Move to the bundle when the same application needs more than one API.
AI Humanizer API
For editing products that return a rewritten draft for review and approval.
$15per month
100,000 humanizer words
- AI Humanizer REST endpoint
- humanize_text MCP tool
- Four supported rewrite models
- Feature-specific word balance
Plagiarism Checker API
For source and originality review inside publishing or education workflows.
$15per month
100,000 plagiarism words
- Plagiarism REST endpoint
- Sentence-level result data
- Source links when returned
- Feature-specific word balance
All three APIs
API Bundle
Use AI detection, humanization, and plagiarism checking under one monthly subscription. The detector and humanizer MCP tools use the same matching feature balances.
$35per month
100,000 words for each included API
- AI Detector REST + MCP
- AI Humanizer REST + MCP
- Plagiarism Checker REST
- One API key and dashboard
A subscription supplies the paid entitlement and usage balance. An API key only identifies the account making a request. Checkout rechecks the live monthly price and allowance, refuses duplicate active subscriptions, and then opens Paddle's hosted payment page. Payment details never pass through Detecting AI.
Pricing FAQ
Know what the plan covers before checkout
Usage follows input words. Keep a small margin for retries and test data when estimating a monthly plan.
How much do the API plans cost?+
The current catalog lists $15 per month for each single-product API and $35 per month for the bundle. Before opening Paddle, checkout verifies that the live monthly price and 100,000-word allowance still match this page.
What does the $35 API Bundle include?+
The bundle includes the AI Detector, AI Humanizer, and Plagiarism Checker REST APIs. It also covers the detector and humanizer tools on the shared MCP server.
How is usage measured?+
Usage is based on the number of words in the submitted text. Detector, humanizer, and plagiarism usage are tracked against the balance for the requested feature.
Does generating an API key include free usage?+
No allowance is created by key generation. An API key is only a credential. Usable requests require an active API entitlement and remaining feature balance. Any future trial or free allowance must be shown explicitly in the account before use.
Are annual billing or volume discounts available?+
This page lists the current monthly starting plans only. Do not assume an annual discount or custom rate until it appears in your dashboard or is confirmed by support.