The Humanizer API Powering
Hundreds of Humanizers
From the team behind Phrasly.ai. When companies want to humanize text in their products, they build on our API: industry-leading humanization and detection, delivered through two simple REST endpoints.
Output tested against every major AI detector
- Teams building on Phrasly
- 500+
- API uptime
- 99.9%
- Typical response time
- <2s
- Per 1K words humanized
- $0.14
Built on Phrasly
When companies need humanization, they come to us
Phrasly's engine already powers AI writing tools, paraphrasers, and humanizers across the industry. Plug the same engine into your product with one API call. No models to train, no GPUs to manage.
- The same models behind phrasly.ai, battle-tested at scale
- No Phrasly attribution or watermarks, so your users never know we're behind it
- From first prototype to millions of words per day
import axios from 'axios';
axios.post('https://business.phrasly.ai/api/v1/humanize', {
text: "AI-generated text to humanize..."
}, {
headers: {
'content-type': 'application/json',
'x-api-key': 'YOUR_API_KEY'
}
})
.then(res => console.log(res.data))
.catch(err => console.error(err));Create your API key
Sign up and generate a production key in under a minute.
Call the endpoint
POST text to /humanize or /detect. That's the whole integration.
Ship your humanizer
Return natural, human-quality text under your own brand.
Two APIs, One Platform
Build with AI Humanization & Detection
Two powerful endpoints to transform and analyze text. Easy to integrate, built for scale.
Transform AI Text to Human
Rewrite AI-generated content so it reads naturally. Built and tested to pass major AI detectors.
- Built to pass Turnitin, GPTZero, Copyleaks & more
- Preserves original meaning and tone
- Streaming support for real-time results
- 20-5,000 words per request
Detect AI-Generated Content
Analyze text to determine the likelihood it was AI-generated, with sentence-level confidence scoring.
- Sentence-level AI probability scoring
- Overall document confidence percentage
- Fast response times under 2 seconds
- Min 50 words, up to 15,000 characters per request
See It in Action
Everything you need, one platform
Monitor usage, manage API keys, and test every endpoint from a single intuitive dashboard.
Real-time analytics at a glance
See your credit balance, word count, and costs broken down by day. Track usage across all your API keys from one place. Invite team members and manage permissions with ease.
Humanize & detect text right in your browser
Don't want to write code just yet? Our interactive tools let you use the humanizer and detector APIs directly from your dashboard. Now with support for batch processing, so you can humanize or detect documents in one go.
Our Technology
The best humanization API. Period.
Purpose-built models, optimized inference, and the lowest prices in the industry. Phrasly is the only API that combines unmatched quality with unbeatable affordability.
Lowest Prices in the Industry
Our industry-leading quantization methods let us run inference at a fraction of the cost. We pass those savings directly to you, making Phrasly the most affordable humanization API available.
Unmatched Output Quality
Purpose-built models trained exclusively for humanization and detection, not repurposed general-purpose LLMs. Our output is continuously tested against every major AI detector on the market.
Built for Scale & Speed
We own the full stack, from models to inference to infrastructure. Sub-2 second response times, 99.9% uptime, and an API designed to handle millions of requests without breaking a sweat.
24/7 Dedicated Support
Our team is available around the clock to help you integrate and troubleshoot. Priority support for all business customers, from first API call to production scale.
Who Builds on Phrasly
One engine, hundreds of products
From writing assistants to standalone humanizers, companies ship faster by letting Phrasly do the heavy lifting.
AI writing assistants
Add a humanize button to your editor. Drafts come back reading naturally, with the same meaning and a human tone.
Humanizers & paraphrasers
Launch a humanizer without training a single model. Many of the humanizers you've seen are already running on Phrasly under the hood.
Education & integrity platforms
Flag AI-generated submissions with sentence-level detection scoring, built into your existing review workflow.
Start in minutes · $100/mo includes $100 in credits
FAQ
Frequently Asked Questions
Ready to power your humanizer?
Join the hundreds of companies building on Phrasly. Two endpoints, simple pricing, and an engine that just works.