AI Humanizer API That Keeps Your Brand Voice Consistent
Pipe your whole content calendar through one pre-publish step and get copy that reads human and stays on-brand. Word-based pricing from $29 a month, tone control on every call, and 40+ languages auto-detected.
Word-based pricing from $0.17 per 1K words. 40+ languages. One Bearer key.
Our new analytics dashboard helps teams track campaign performance. It provides real-time insights and actionable data. Additionally, it streamlines workflows and improves efficiency. In today's fast-paced world, businesses need tools that deliver results and drive growth at scale.
Our new analytics dashboard shows you how campaigns are doing as they happen, not days later. You see which numbers moved and what to do about them, without digging through five reports. For a busy team, that is the difference between reacting on time and finding out too late.
Built for content marketing teams
The humanizer that powers writehuman.ai, as a REST API you wire into your publishing pipeline.
Brand voice as an API primitive
Set the tone parameter per content type (professional, blog, casual, creative, technical, scientific, academic) so blog posts, product copy, email, and ads all come back in one consistent voice, not seven different writers.
Built for publishing volume
Premium runs 400,000 words a month at 120 requests per minute, and 125,000-word top-up packs never expire, so a busy content calendar never stalls on a quota reset.
Reads human, not shuffled
Output keeps meaning and structure while varying rhythm and phrasing, and it passes AI-detection checks. The Before/After showcase below shows exactly what comes back.
A QA gate inside the same call
POST /v1/detect returns an ai_probability score and a predicted class, so you can fail any draft above your threshold before it reaches the publish queue, without a second vendor.
From flat AI draft to copy that reads human
Same meaning, same facts. The API rewrites the rhythm, word choice, and transitions that make AI copy obvious.
Our new analytics dashboard helps teams track campaign performance. It provides real-time insights and actionable data. Additionally, it streamlines workflows and improves efficiency. In today's fast-paced world, businesses need tools that deliver results and drive growth at scale.
Our new analytics dashboard shows you how campaigns are doing as they happen, not days later. You see which numbers moved and what to do about them, without digging through five reports. For a busy team, that is the difference between reacting on time and finding out too late.
One draft, every brand voice
Pass a tone with each request so blog, product, email, and ad copy all land on-brand.
Source sentence
Our new analytics dashboard tracks campaign performance in real time.
Our new analytics dashboard reports campaign performance in real time, giving your team the numbers they need exactly when decisions are being made.
Humanize every draft on its way to the CMS
Writers and AI assistants produce blog posts, product copy, email, and ad variations exactly the way they do today, with no change to how content gets created. Your CMS hook or a Zapier/Make step calls POST /v1/humanize with the tone that matches the content type and gets human-reading copy back as JSON in about 20 seconds. Gate the draft with POST /v1/detect, push it into your content calendar, and track word spend per project through the read-only GET /v1/usage endpoint.
# Take a finished AI draft and humanize it in your brand voice
curl https://api.writehuman.ai/v1/humanize \
-H "Authorization: Bearer wh_live_your_key_here" \
-H "Content-Type: application/json" \
-d '{
"text": "Our new analytics dashboard helps teams track campaign performance in real time. It surfaces the metrics that matter and removes the noise.",
"tone": "blog",
"language": "en"
}'
# The response returns the humanized text plus the input words billed for this call.
# Billing is by input words, so you can model cost straight from your editorial calendar.Simple, word-based pricing
Pay for the words you send. Allowances reset every billing cycle, and top-up packs never expire.
Standard
$29 / mo- 125,000 words / month
- 40 requests / min
- Single humanized result per request
Premium
$69 / mo- 400,000 words / month
- 120 requests / min
- 3 variations with human-likeness scores
Frequently asked questions
Will the API flatten our brand voice into generic copy?
No. Every call takes a tone parameter (professional, blog, casual, creative, technical, scientific, academic), so you set the voice per content type and it holds across volume. The tone showcase on this page renders one sentence across several tones so you can see the range before you integrate.
How does it fit into our CMS and publishing stack?
Humanization is a single POST request, so it slots in as a pre-publish step in a headless CMS hook, a serverless function, or a Zapier or Make flow. A marketing-ops engineer can wire it in an afternoon, with no copy-paste between an AI tool, a web app, and the CMS.
Can it keep up with our publishing volume?
Premium covers 400,000 words a month at 120 requests per minute, and the per-request limit is up to 2,000 input words. If you run hot in a heavy month, 125,000-word top-up packs add capacity and never expire, so a quota reset never blocks a launch.
Is the output actually human-quality?
The output keeps your meaning and varies rhythm and phrasing so it reads as human, and it passes AI-detection checks. You can confirm it in your own pipeline with POST /v1/detect, which returns an ai_probability from 0 to 1 and a predicted class of ai, human, or mixed.
Is there a free tier or a way to test before we commit?
Pricing is word-based and starts at Standard for $29 a month with 125,000 words. The cleanest way to evaluate is to run a representative batch from your real content calendar through /v1/humanize and check the results against your editors and your detection threshold. See current plans on the /api#pricing page.
Does it support content for non-English markets?
Yes. The API handles 40+ languages and auto-detects the input language, so the same pre-publish step works across your localized blog, product, and email content without a separate call per market.
Make humanize the last step before publish
Wire one POST request into your CMS or Zapier flow and ship a calendar full of copy that reads human and holds one brand voice. Get an API key on the /api page and read the integration guide at /api/docs.