Naturalization API for AI-generated content

Turn AI drafts into text that reads human — or slips past detectors. One API, two modes, honest about the trade-off.

🎯 Two Modes

Natural: rewrites to read like a person wrote it.
Undetectable: stronger paraphrase when voice can change.

🔒 Fact-Safe

Numbers, names, entities, and claims are preserved by hard gates. Meaning verified via NLI entailment.

⚡ Simple API

One endpoint. POST /v1/naturalize with text + preset. Get the rewrite + metadata in seconds. Full OpenAPI at /docs.

💡 Honest Labels

We tell you exactly what each mode does — and what it costs. No "makes it undetectable AND natural" false promises.

Get started in <5 minutes

# Python SDK # pip install -e ./thinkingnative-client from thinkingnative_client import ThinkingNative tn = ThinkingNative(api_key="YOUR_API_KEY") out = tn.naturalize( "Moreover, our team leveraged cutting-edge technology.", preset="naturalness", # or "undetectable" ) print(out.text)
# Long undetectable calls (Cloudflare-safe) out = tn.naturalize_wait(text, preset="undetectable") # or: POST /v1/naturalize/async → poll GET /v1/naturalize/jobs/{jobId}
# curl curl -sS https://api.thinkingnative.com/v1/naturalize \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{"text":"Moreover, our team leveraged cutting-edge technology.","preset":"naturalness"}'
// JavaScript (fetch) const res = await fetch("https://api.thinkingnative.com/v1/naturalize", { method: "POST", headers: { "Authorization": "Bearer YOUR_API_KEY", "Content-Type": "application/json", }, body: JSON.stringify({ text: "Moreover, our team leveraged cutting-edge technology.", preset: "naturalness", // or "undetectable" }), }); const data = await res.json(); console.log(data.text);

How it works

1

Send your AI draft

POST your text with a preset (natural or undetectable). Include preserve terms if needed.

2

ThinkingNative processes it

The engine rewrites for your chosen goal — natural voice or detector evasion — while preserving facts and meaning.

3

Get the rewrite

Receive the naturalized text + metadata (engine, stats, warnings). Use it directly in your pipeline.

Ready to build?

Substantially cheaper than competitors. Transparent per-word pricing.

See pricing →