Now available - Blog Writer endpoint

AI Text that's Truly Humanized.

Rewrite boring and detectable AI writing so it not only bypasses AI detection, but engages the reader naturally.

View documentation

Starting at $100 - No subscription required

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API Users

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Businesses

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Words Generated

Powered by our advanced models

Choose from our suite of AI models designed for different use cases and performance needs.

Most Popular

Stealth Pro

$0.20per 1K words
Input & Output
Generate & rephrase content
Quality & fast processing modes
Multilingual + tone control
Best Value

Stealth Business

$2.00per 1K words
Input & Output
More powerful model engine
Higher accuracy humanization
All Pro features included
Custom Solution

Enterprise

Custompricing
Input & Output
Enterprise-grade reliability
SLA guarantees
24/7 premium support

All in One Simple AI Writing Solution

Forget complex workflows, start writing now.

1. Paste Your Detectable AI Text

Send your AI generated content from ChatGPT, Gemini, or any other AI writer.

2. Humanize

Our undetectable AI model will create authentic writing that bypasses AI detection.

3. Publish

With your fully rewritten text you're good to go.

Built for Quality, Speed, and Privacy

StealthGPT's model is proven to be the most powerful AI Humanizer that will keep your generated content undetectable and easy to understand.

Human Tone

Every piece of AI rewritten content uses varied sentence structures and human-quality phrasing that gets the message across.

Preserve Meaning

All the value of the original AI text is kept while bypassing AI detection. Keep the meaning, remove the AI.

Unmatched Quickness

Fully Humanized writing in under 5 seconds. Paste, click, done!

Why developers choose StealthGPT

Built for production from day one.

Undetectable output

Every response includes a detection score (0-100) so you know exactly how likely your content is to be flagged.

Quality & speed modes

Choose between quality mode with built-in checks or fast mode for single-pass generation. Control detail with High, Medium, and Low.

Automatic multilingual

Auto-detects input language and preserves it in the output. No manual configuration needed.

Three endpoints, endless possibilities

Generate, rephrase, and publish - all through a single REST API.

Writer & Humanizer

Generate original content or rephrase existing text to bypass AI detection. Set tone to Standard, HighSchool, College, or PhD.

/api/stealthify

Blog Writer

Generate complete, SEO-optimized blog articles in markdown with embedded images. Undetectable and publish-ready.

/api/stealthify/articles

Usage & Balance

Track remaining word credits and monitor consumption in real time. Every response returns words spent and remaining balance.

/api/stealthify/balance

Built for every content workflow

From single API calls to full publishing pipelines, StealthGPT fits right in.

SEO Blog Pipelines

Auto-generate full markdown blog posts with images, optimized for search engines and completely undetectable

Content Rephrasing

Feed in existing drafts and get back humanized versions that pass every AI checker - with a detection score to prove it

Academic Tone Control

Set output tone to HighSchool, College, or PhD level for educational content that matches your audience

Multilingual Content

Auto-detects input language and generates natively - no manual language flags or config needed

High-Volume Generation

Fast mode for rapid single-pass content, quality mode for multi-check outputs. Scale from 500K to 5M words

Custom Integrations

Simple REST API with api-token auth. Works with any language or framework - Python, Node, Go, and more

Start generating in minutes

1

Get your API key

Purchase your initial word credits from the dashboard and grab your api-token.

2

Make your first call

Send a POST to /api/stealthify with your prompt, tone, and mode. That's it.

3

Ship with confidence

Every response includes a detection score and words spent. Monitor your balance and scale as you grow.

Frequently Asked Questions

How does Stealth API work?
Stealth API integrates directly into your content workflow through simple REST calls. Send your AI-generated content to our endpoint, and our humanization engine transforms it with natural language patterns and authentic phrasing instantly. No complex configuration required-just integrate once and automate your entire content humanization process at scale.
Will my content keep its original meaning?
Yes. Our humanization technology preserves your content's core message, keyword optimization, and SEO structure while rewriting AI patterns into natural human language. Your articles maintain their informational value, search intent alignment, and conversion focus-they just become completely undetectable to AI checkers.
What AI tools does Stealth API work with?
Stealth API works with all AI content generators including ChatGPT, GPT-4, Claude, Jasper, Copy.ai, and any custom language models. Send content from any source and receive humanized output that bypasses detection regardless of which AI originally created it.
What if I'm not satisfied with the results?
Every enterprise client receives dedicated account management and unlimited revision support. If humanized content doesn't meet your quality standards or bypass detection requirements, we'll adjust parameters, refine customization, or reprocess content until it matches your exact specifications. Your success is guaranteed.
What languages are supported?
Stealth API supports humanization in over 1,000 languages including English, Spanish, French, German, Mandarin, Japanese, Arabic, Portuguese, and all major global languages. Scale international SEO campaigns with undetectable content localized for any market worldwide.
How quickly can I integrate Stealth API into my workflow?
Most technical teams complete integration in under one business day with our comprehensive documentation and code examples. Enterprise clients receive dedicated integration support, custom implementation assistance, and priority onboarding to ensure seamless deployment into existing content pipelines.
Does Stealth API affect my content's SEO performance?
Stealth API improves SEO performance by removing AI detection penalties while preserving keyword optimization, meta structure, and search intent alignment. Clients typically see ranking improvements after humanization because Google rewards quality content over detectable AI patterns.
Can I process content in bulk?
Yes. Stealth API handles bulk processing with parallel requests for maximum throughput. Humanize hundreds or thousands of articles simultaneously for high-volume publishing needs. Perfect for content agencies, large marketing teams, and businesses managing multiple blog sites.
Is there a limit to content length?
Stealth API processes articles from 100 to 10,000+ words with consistent quality. Whether you're humanizing short product descriptions or comprehensive long-form guides, output maintains natural flow and undetectability throughout the entire document.
How do I get started with Stealth API?
Schedule a free strategy consultation where we'll analyze your current content workflow, identify SEO risks from AI detection, and design a custom implementation plan. During onboarding, you'll receive API credentials, technical documentation, and dedicated support for successful deployment.

Simple, pay-as-you-go pricing

No subscriptions. No contracts. Just buy words and build.

Pay as you go

Developer

One-time word purchase, then pay as you go

$0.0002per word

Same rate for input & output

  • Access to Pro & Business models
  • Writer, Humanizer & Blog Writer endpoints
  • Words never expire - use at your own pace
  • Support via Zendesk & Discord

One-time purchase - Top up anytime - No subscription

Volume pricing

Enterprise

Custom word volumes and dedicated support for teams at scale

Custom

Volume discounts available

  • Dedicated account manager
  • Priority email & phone support
  • Custom SLA agreements
  • Bulk word pricing
  • White-glove onboarding
  • Tailored to your workflow

All plans include access to our full suite of endpoints and features - No setup fees - No subscriptions