AI Detector API
SOC 2 Type I

AI Detector API

Analyze text for AI-generated content with an overall probability and sentence-level scores.

Try Walter's Text Detection API today

AI DETECTOR
Input 244
curl -X POST https://developer-portal.walterwrites.ai/api/detector/ -H "Content-Type: application/json" -H "X-API-Key: YOUR_API_KEY" -d '{ "content": "Artificial intelligence has transformed many industries." }'
Output
"status": "success", "result": "ai", "ai_score": 0.87, "items": [{ "prediction": "ai-generated", "ai_score": 0.87 }], "word_count": 7, "credits_remaining": 1993

Integrate the AI Detector API into any stack.

From classrooms to content marketplaces to recruiting platforms, detection that fits the workflow your team already runs.

  • LMS and edtech platforms

    Drop into Canvas, Moodle, Schoology, or your own LMS to score every submission at upload. Per-student dashboards, FERPA-aligned data handling, and an Education tier with discounted volume.

  • Content marketplaces and publishers

    Flag AI-generated submissions at ingestion.

  • HR and recruiting

    Score cover letters, take-home assignments, and written interview responses.

Pair detectionwith the rest of Walter.

Use one developer portal and scoped API keys for humanization, AI text detection, grammar correction, plagiarism scanning, and AI image detection.

AI Detector API interface preview
AI Detector API interface preview

AI Detector API

Live

Analyze text for AI-generated content with confidence scores and sentence-level details.

AI Humanizer API interface preview
AI Humanizer API interface preview

AI Humanizer API

Live

Transform AI-generated text into natural, human-like content through a documented REST endpoint.

AI Voice Detector API interface preview
AI Voice Detector API interface preview

AI Voice Detector API

Coming soon

Audio detection is planned for a future Walter API release.

Plagiarism Checker API interface preview
Plagiarism Checker API interface preview

Plagiarism Checker API

Live

Scan text against web sources and return a score, matched URLs, and highlighted character ranges.

Grammar Checker API interface preview
Grammar Checker API interface preview

Grammar Checker API

Live

Correct grammar, spelling, and punctuation and return corrected text plus a complete word-level diff.

AI Image Detector API interface preview
AI Image Detector API interface preview

AI Image Detector API

Live

Upload an image and receive a real, fake, or inpainting verdict with confidence and per-class probabilities.

AI Detector API pricing by monthly volume.

Monthly plans with included word quotas. No commitments. Volume discounts built in.

300K

$49

300K words / mo

1M

$129

1M words / mo

2M

$229

2M words / mo

5M

$479

5M words / mo

12M

$899

12M words / mo

25M

$1,699

25M words / mo

Need enterprise pricing?

Talk to us about higher-volume workloads and enterprise deployment requirements.

Frequently asked questions.

Documented answers about the endpoint, response, limits, billing, and production use.

What does the AI Detector API return?

The synchronous response returns an AI or human verdict, an ai_score from 0 to 1, sentence-level items, execution time, word count, remaining credits, and status details.

How is the AI score classified?

The documented ranges are 0 to 0.3 Human, 0.3 to 0.5 Likely Human, 0.5 to 0.7 Likely AI, and 0.7 to 1 AI-Generated. The binary result changes to AI above 0.5.

Can detector results be wrong?

Yes. Detection is probabilistic. Treat the score and sentence-level items as review signals and consider the text, writer, and use case before making a decision.

Does the endpoint support asynchronous processing?

Yes. You can use a callback URL, polling, or both. Synchronous requests return the result directly.

How do I authenticate?

Send an API key with the ai_detector scope in the X-API-Key header.

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