Developer API

AI Humanizer API

Integrate our powerful AI text humanizer directly into your applications. Transform AI text, detect AI content, verify facts, and check plagiarism with simple REST API calls using our advanced AI humanizer.

Powerful API Endpoints

Access our complete suite of AI content tools through simple REST API calls

POST
https://humanizerpro.ai/api/v1/humanize
Standard API endpoint. Transform AI-generated content into natural, human-like text that bypasses AI detection systems.
POST
https://humanizerpro.ai/api/v1/humanize/stream
Streaming API endpoint. Receive real-time Server-Sent Events (SSE) updates as your text is being processed.

https://humanizerpro.ai/api/v1/humanize

Content-Type: application/json
x-api-key: "API_KEY_HERE"
{
  "text": "Artificial intelligence has fundamentally transformed the landscape of modern technology.",
  "modelType": "Advanced"
}
{
  "output": "Artificial intelligence has fundamentally transformed the landscape of modern technology.",
  "remainingPoints": 98253
}

API Pricing Plans

Choose the perfect plan for your API usage.

Save 40%

Api Starter

$37/month
100,000words / month
Billed monthly
$0.370 per 1K words

Api Professional

$79/month
250,000words / month
Billed monthly
$0.316 per 1K words
MOST POPULAR

Api Business

$149/month
500,000words / month
Billed monthly
$0.298 per 1K words

Api Enterprise

$279/month
1Mwords / month
Billed monthly
$0.279 per 1K words

Api Scale

$499/month
2Mwords / month
Billed monthly
$0.249 per 1K words

Api Ultra

$1100/month
5Mwords / month
Billed monthly
$0.220 per 1K words

Custom Plan

Enterprise volume pricing

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API Access

Generate and manage your API keys for programmatic access

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Why Developers Use This API

It actually sounds human – We rework sentence structure and rhythm, not just swap out words - so the output reads like someone wrote it, not like it was rewritten by a machine.
One key, four tools – Humanize text, detect AI content, verify facts, and check for plagiarism - all through the same API key, instead of stitching together separate services.
Holds up against real detectors – We test against GPTZero, Turnitin, and Originality.ai as part of building this, so you're not shipping something untested.
Built for developers – One REST endpoint, clear docs, no SDK required. Send a request from whatever language you're already using.
Fast and private – Requests are processed in real time, and we don't store your content or use it to train models.

Who's Building With It

Writing apps – Add rewriting, AI detection, and humanization to your editor instead of building that pipeline yourself.
EdTech platforms – Let students and teachers check whether text is AI-written, verify claims, and clean up AI-assisted drafts.
SEO and content agencies – Humanize AI drafts, run a plagiarism check, and confirm the facts before anything goes live.
Content teams at scale – Run rewriting, fact-checking, and AI detection across a whole content pipeline, not one document at a time.

Built for Production

Fast

Most requests finish in under 2 seconds.

Secure by default

Every request is encrypted, and nothing is kept longer than it needs to be.

99.9% uptime

Backed by a global CDN, so it holds up when you need it.

Real support

A developer on the other end, not a ticket queue.

Learn more about the AI Humanizer API

AI Humanizer API Frequently Asked Questions

Can one API key cover the Humanizer, AI Detector, and Plagiarism Checker?

Yes - one key works across all four endpoints: Humanizer, AI Detector, Plagiarism Checker, and Fact-Checker. Running high volume? Use code API50 for 50% off any plan, or contact us and we'll work out a rate that fits.

How accurate is the detector, and does the rewriting actually work?

The AI Detector's trained across a wide range of writing styles and returns a confidence score with every result, so you know how strong the call is. The Humanizer rewrites text to read naturally, which tends to lower AI-detection scores - though no rewriting tool can promise a specific number against every detector out there.

Is my data safe when I send it to your API?

Yes. We don't store your text or use it to train anything - each request gets processed and then discarded. That's true whether you're calling the Humanizer, the AI Detector, the Plagiarism Checker, or the Fact-Checker.

Ready to Get Started?

Join thousands of developers already using our API to power their applications