Natural writing, on purpose
Improve flow, sentence rhythm and word choice. Choose a natural, conversational or professional tone for the context your users work in.
UltraHumanizer / Developer platform
API v1 · Prepaid accessNatural writing.
Built into your workflow.
Bring UltraHumanizer’s editorial capabilities to your product. Shape the voice, protect the details, and give your users writing they can review.
Create a key, add credits, and make your first request. No subscription required.
UltraHumanizer APIExample response
{
"request_id": "req_example",
"text": "You can use Acme for $20 per month.",
"usage": {
"billing_unit_version": "2026-10-v1",
"input_units": 8,
"charged_units": 8
},
"detail_changes": [],
"warnings": [],
"engine_version": "uh-editorial-2026-10"
}01 Shape the expression02 Protect key terms03 Review important changes04 Fit your workflow
The editorial layer
Your product. A more natural voice.
The API brings together the rewriting and review capabilities behind UltraHumanizer in a released interface for developers.
Give every edit a direction
Guide length, reading style and rewrite strength. Keep brand names and specialist terms in focus with explicit protected terms.
Keep important details visible
Pair revised text with structured change warnings for numbers, dates, links, quotations and citation markers. Route changes to a human reviewer.
Remove filler with focus
Use a dedicated slop-removal task for generic introductions, stock phrases, inflated wording and repetitive transitions.
Keep the language of the source
Build workflows around the original language. Evaluate representative samples for your audience before enabling automatic publication.
A clear contract for your app
Plan around JSON requests, explicit controls, usage metadata and consistent errors. Explore the released interface in our API documentation.
From draft to decision
Give automation a review step.
A polished sentence still needs to say the right thing. Use the returned detail changes to decide whether a draft moves forward or needs an editor.
Explore the review response →1. Send a draft and your constraintsSet tone, length, rewrite strength and protected terms.
2. Receive the revised text and change signalsInspect additions or removals in supported important details.
3. Review, then publish through your appYour application owns the approval step. Change signals do not verify facts.
Built around your use case
One editorial step. Many places to use it.
Prepare drafts for an editor
Add rewriting and review signals before content reaches your CMS. Keep the source alongside the revision for approval.
CMS workflow →Make rewriting part of your app
Give customers a focused editing action inside the interface they already use. Keep your own product experience and publishing rules.
Application workflow →Connect your content pipeline
Plan an HTTP step in n8n, Make or a custom service. Use explicit usage and warning fields to guide the next action.
Automation workflow →Integration patterns are illustrative. Native connectors and SDKs are not currently available.
Prepaid pricing
Start small. Add credits as you grow.
Our API uses prepaid input credits, separate from website memberships. No automatic renewal or surprise overage charges .
$9one-time pack
30,000 input credits
Explore a focused integration.
- $0.30 per 1,000 input credits
- Input-based, versioned credit counting
- Separate from website word allowances
$29one-time pack
150,000 input credits
Plan a recurring content workflow.
- $0.193 per 1,000 input credits
- Input-based, versioned credit counting
- Separate from website word allowances
$99one-time pack
600,000 input credits
Prepare for a larger publishing pipeline.
- $0.165 per 1,000 input credits
- Input-based, versioned credit counting
- Separate from website word allowances
Buy credits in the developer dashboard. Credits do not expire while the service remains available. No automatic top-up. Read the billing rules.
Before you integrate
A few useful answers.
Can I get an API key today?
Yes. Sign in to the developer dashboard, create a server-side API key and add prepaid credits. The documentation includes live endpoints and working request examples.
Does my website subscription include API access?
No. API access and credits are a separate product. A website membership does not currently include developer API calls.
Can I try the writing experience?
Yes. Use the UltraHumanizer web editor to evaluate the current rewriting experience with your own samples. Website limits and sign-in requirements apply.
Does the API verify facts or guarantee detector results?
No. The review fields identify supported text changes. They do not prove factual accuracy, authorship or a detector outcome. Keep a human review step for important content.
What about higher volume or enterprise requirements?
Tell us your expected monthly input, peak concurrency, languages and data-handling needs. Capacity, retention terms and any service commitment need to be agreed before a production integration.
Let’s build the right integration
Tell us where better writing belongs.
Share your product, languages and expected monthly volume. We’ll use that context to discuss access and the requirements for your workflow.
Need a custom integration? Write to support@ultrahumanizer.ai.