Developer API

Humanize AI Text With One API Call

Turn AI-generated content into natural, human-sounding text. Simple REST API. Two models. Five tones. 50+ languages. Integrates in minutes.

Get Free API Key Read the Docs

500 free credits No credit card needed Setup in 2 minutes

bash

curl -X POST https://thehumanizeai.pro/api/v1/humanize \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Your AI-generated text here",
    "model": "fast"
  }'

Works with every AI model

Humanize text from any source. ChatGPT, Claude, Gemini, Copilot, or your own fine-tuned models.

ChatGPT

Claude

Gemini

LLaMA

Mistral

Copilot

Built for Production

Everything you need to ship AI humanization in your product. No complexity, no guesswork.

Two Humanization Models

Fast mode for instant results. HumanoidX for tone-controlled, premium output. Pick the right model for every use case.

99.8% Bypass Rate

Passes Turnitin, GPTZero, Originality.ai, Copyleaks, and every major AI detector on the market.

Sub-3s Response Time

Fast model returns results in under 3 seconds. Built for production workloads and real-time applications.

Simple API Keys

Generate keys from your dashboard. SHA-256 hashed storage. Rotate or revoke keys instantly.

Pay As You Go

Buy credits, use them whenever. No subscriptions, no monthly fees. 1 credit = 1 word. Credits never expire.

50+ Languages

Humanize content in English, Spanish, French, German, Chinese, Arabic, and 45 more languages.

Two Models, One Endpoint

Pick the right model for every request. Same endpoint, same API key, different results.

Fast

model: "fast"

Sub-3 second response time
Best for high-volume workloads
Standard humanization quality
No tone parameter needed

{"model": "fast"}

HumanoidX

model: "humanoidx"

PRO

Premium humanization engine
5 tone options for precise control
Best for quality-sensitive content
Academic, formal, casual, concise, expand

{"model": "humanoidx", "tone": "academic"}

Available Tones for HumanoidX

AcademicResearch papers, essays, theses

FormalBusiness reports, proposals

CasualBlog posts, social media

ConciseSummaries, bullet points

ExpandLengthen and add detail

Clean JSON Responses

Every response includes the humanized text, word count, credit usage, and remaining balance. No nested objects, no pagination, no complexity.

Humanized text ready to use
Credit usage tracked per request
Remaining balance in every response
Standard HTTP error codes

json

{
  "humanized_text": "Your text, rewritten to sound human",
  "original_words": 5,
  "credits_used": 5,
  "credits_remaining": 4995,
  "model": "fast",
  "tone": null
}

What Developers Build With It

From browser extensions to full SaaS products. See how developers use the API.

Content Platforms

Integrate humanization into your CMS or writing tool. Let users humanize AI drafts before publishing.

AI Agents and Chatbots

Make chatbot responses sound natural. Add a humanization layer to any LLM pipeline.

SaaS Products

White-label humanization for your product. Offer AI-to-human text conversion as a feature.

Browser Extensions

Build extensions that humanize text on any webpage. Gmail, Docs, LinkedIn, or anywhere users write.

Simple, Transparent Pricing

Buy credits when you need them. No subscriptions. No monthly fees. Credits never expire.

Starter

5K credits

$4.99one-time

$0.001 per credit

Standard

POPULAR

25K credits

$14.99one-time

$0.0006 per credit

Bulk

100K credits

$39.99one-time

$0.0004 per credit

Mega

BEST VALUE

500K credits

$149.99one-time

$0.0003 per credit

Rate Limits Scale With Usage

Explorer

1 req/s

1 key

Start

Builder

5 req/s

3 keys

50K credits used

Scale

15 req/s

10 keys

200K credits used

Enterprise

30 req/s

25 keys

1M credits used

Start building today

500 Free Credits. No Card Required.

Generate your API key, test both models, and ship your integration. Takes less than 2 minutes.

Get Your API Key View Documentation