AI Humanizer API. Natural text, at scale.
Add HumanizerGPT to your CMS, content pipeline or product. One REST endpoint for humanizing, paraphrasing, rewriting and proofreading.
Built for teams that publish a lot
SEO and content agencies
Run every AI-assisted draft through the humanizer before it reaches a client or a CMS.
CMS and publishing pipelines
Call the API from WordPress, a headless CMS or an automation tool as a step before publishing.
White label
Offer humanizing inside your own product, under your own brand, with HumanizerGPT behind the scenes.
Every tool, one endpoint
Humanize, paraphrase, rewrite or proofread by changing a single parameter.
Keyword lock
Pass the terms that must survive the rewrite, such as product names and target keywords.
50+ languages
Send text in the language you publish in; results come back in the same language.
Planned pricing
API plans are planned to start at $99 a month for 200,000 words, counted on input words like the website. Larger monthly volumes and annual contracts will be available for agencies and platforms.
What a request will look like
Planned interface — subject to change before launch.
POST https://humanizergpt.ai/api/v1/text
Authorization: Bearer <your API key>
Content-Type: application/json
{
"task": "humanize",
"mode": "seo",
"level": "balanced",
"keywords": ["HumanizerGPT"],
"text": "In today's fast-paced digital landscape, ..."
}
200 OK
{
"text": "Most teams now use AI somewhere in their work, ...",
"words_in": 57,
"words_out": 52,
"words_remaining": 199943
}Fair and responsible use
The API is meant for improving content you have the right to publish. It must not be used for academic dishonesty or to mislead readers about who wrote something. See our responsible use policy.
API questions
When will the API be available?
The API is in development. Join the waitlist and we will email you when early access opens.
How much will it cost?
Plans are planned to start at $99 a month for 200,000 words, with larger volumes available. Final pricing will be confirmed at launch.
Which features will the API support?
The same engine as the website: the humanizer, paraphraser, rewriter and grammar checker, all modes and rewrite levels, keyword lock and 50+ languages.
Will my content be stored?
API requests will be processed and not used to train models. Retention options will be documented at launch.
Can I offer it under my own brand?
White-label use is part of the plan for agencies and SaaS products. Tell us about your use case when you join the waitlist.
Need it before the API launches?
The web app is free for 500 words a day, and paid plans go up to Unlimited (fair use).