AI Humanizer API: How to Humanize AI Text Programmatically

Why Browser Tools Don't Scale for Content Teams

When you are going to humanize 1 or 2 pages every week, then using browser-based tool for the purpose will be fine for you. All you need to do is open the website, type your text there and copy the result which you would get from the website. This process takes not more than two minutes per page.

It may take up to two hours when you are trying to humanize 50 pages on a monthly basis and around an entire working day if you are humanizing 200 pages on a monthly basis using the above method. It was said by some agency that they have hired an employee for the sole purpose of humanizing pages via pasting them on the browser-based websites.

What an API does is to make the process completely automated by sending and receiving POST requests containing texts to and from humanizers respectively. You can automate everything by integrating the API into your content generation process pipeline itself.

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How the Humanize AI Pro API Works

The endpoint receives a JSON body with two keys: the text itself and the mode required.

There are five possible modes. Academic will preserve formality and structure of sentences while applying different patterns detection. Formal mode does the same thing with business writing. Casual mode is used for converting text into more casual style. Concise mode will make the text shorter, and the Expand mode makes it longer.

Here is an example in Python:

import requests

resp = requests.post(
    "https://thehumanizeai.pro/api/v1/humanize",
    json={"text": "Your AI-generated text here", "tone": "academic"},
    headers={"Authorization": "Bearer YOUR_API_KEY"}
)
print(resp.json()["humanizedText"])

In JavaScript:

const res = await fetch("https://thehumanizeai.pro/api/v1/humanize", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Authorization": "Bearer YOUR_API_KEY"
  },
  body: JSON.stringify({ text: "Your AI text", tone: "academic" })
});
const { humanizedText } = await res.json();

The response takes on average 1 to 3 seconds for processing a usual article of 1,000 words. You'll receive all converted text in one go.

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Detection Bypass Results from the API

Tested the exact test as the one used for the browser tool. Produced an essay of 1,200 words on an academic topic using ChatGPT-4o. Passed the essay through the API academic mode and submitted the result to three different detectors.

Detector	Before API	After API
Turnitin	97% AI	2% AI
GPTZero	94% AI	4% AI
Originality.ai	96% AI	3% AI

Since the browser tool and API use the same technology, you will get similar results. You can use both interchangeably. If you have tried out the browser tool and satisfied with its performance, then the API will produce the same results.

To test latency in generating content, I made 100 requests consecutively. Average latency time was 2.1 seconds while the maximum time taken was 4.8 seconds.

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Who Uses the API and Why

The largest customer type is agencies. These agencies create drafts using either ChatGPT or Claude and then pass each draft through the API before posting. An agency that creates 300 pieces of content a month has decreased their content creation process by 60% since integrating with the API.

SaaS applications integrate the API into their platforms. As someone who creates a writing tool, you can offer humanization as a feature even without having to train a new model. Just invoke the Humanize AI Pro API in the backend.

SEO specialists can use the API for programmatic content generation. For instance, when creating hundreds of location pages or product descriptions, it should not fail in passing the detection process.

Micro-SaaS applications build products based on the API's functionality. I have personally seen three apps released on Product Hunt that utilize the Humanize AI Pro API behind the scenes.

In terms of automation workflows, you can integrate with either n8n or Zapier. You can set up a webhook which will automatically humanize your draft once it reaches your CMS.

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Pricing and Rate Limits

There is ample number of requests available in the free plan for testing the API well. Credit card details are not needed.

Paying plans charge based on the word count rather than the requests. Whether you use one single request or five, a 500-word article will cost the same.

There are no rate limits on paying plans. Should you need to process 1,000 articles in one hour, the API can do it.

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Getting Started

Join Humanize AI Pro, where you will obtain an API key that you have to include in the 'Authorization' header in each call made using the API.

Full documentation for the API will cover everything regarding authorization, all five modes, errors, and responses. Any problem that occurs during integration, please contact me via the dashboard; I reply to API support tickets myself.