API for Content Platforms

Your Users Create Content with AI. We Strip the Watermarks Before Publishing.

Bulk watermark removal API for platforms. Process 1000s of posts/hour. Preserve formatting, remove tracking.

const response = await fetch(
  "https://api.gptwatermarkremover.com/v1/clean",
  {
    method: "POST",
    headers: {
      "X-API-Key": "YOUR_API_KEY",
      "Content-Type": "application/json"
    },
    body: JSON.stringify({ text: "Your AI-generated text here" })
  }
);

const { cleaned_text } = await response.json();

The Platform Risk

Users generate content with AI tools. Watermarks stay in published posts. Your platform's reputation suffers.

1. Users Create with AI

Your users write posts, articles, comments using ChatGPT, Claude, Jasper.

2. Watermarks Get Published

AI tools embed invisible tracking. Users publish to your platform. Watermarks stay in.

3. Platform Gets Flagged

Detectors scan your platform. High AI content percentage. Reputation damaged. SEO hit.

The Fix: Bulk Watermark Removal in Publishing Pipeline

Process 50 posts per API call. Strip watermarks before content goes live. Users can use AI tools freely, your platform stays protected.

// Fetch pending posts from your platform
const posts = await db.posts.findMany({
  where: { status: 'pending' },
  take: 50
});

const texts = posts.map(p => p.content);

// Bulk clean all posts in one API call
const response = await fetch(
  'https://api.gpt-watermark-remover.com/v1/bulk',
  {
    method: 'POST',
    headers: { 'X-API-Key': 'your_api_key' },
    body: JSON.stringify({ texts })
  }
);

const { cleaned_texts } = await response.json();

// Update all posts with watermark-free versions
await Promise.all(
  posts.map((post, i) =>
    db.posts.update({
      where: { id: post.id },
      data: {
        content: cleaned_texts[i],
        status: 'published'
      }
    })
  )
);

Publishing Pipeline Integration

Add watermark removal to your moderation workflow

1

User submits content → enters moderation queue

2

Moderator reviews and approves content

3

Strip watermarks via bulk API

Process 50 approved posts at once, < 1 sec total

4

Publish clean content to platform → no watermarks

Bulk Processing (/v1/bulk)

For platforms processing multiple posts at once:

  • 50 texts per API call
  • 50x fewer API calls needed
  • Lower cost (counts as 1 request for rate limit)
  • Perfect for batch jobs, migrations, moderation queues

Webhook Support (Async)

For async workflows and distributed systems:

  • POST with webhook_url, get immediate 202 response
  • We callback with cleaned texts when done (<1 sec)
  • No blocking—continue processing immediately
  • HMAC signature for webhook security
50
Texts per Bulk Call
<1s
Bulk Processing Time
12.9M
Texts/Day (Default Tier)
100%
Formatting Preserved
99.9%
Uptime
<100ms
Response Time
All Known
Watermark Types
100K
Max Characters
HTTPS encrypted
No text stored
Edge-deployed globally

Simple Pricing

API access included with every premium subscription

Available Now

Premium Subscription

Everything you need to get started

  • 1,000 API calls per month
  • 100,000 characters per request
  • All web features included
  • Instant API key generation
View Documentation
Coming Soon

Developer Tiers

Higher volume plans for production apps

  • Higher volume tiers
  • Team and organization plans
  • Custom enterprise solutions

Watermark Types We Detect

Our API detects and removes all known invisible Unicode characters used by AI systems like ChatGPT, Claude, Gemini, and others to watermark generated text.

Zero-Width Characters

Invisible characters with no visual width, commonly inserted by AI systems to mark generated text.

Zero-Width Space
Most common AI watermark. Invisible space character inserted between words or characters.
Zero-Width Non-Joiner
Prevents character joining in scripts like Arabic. Used as hidden marker in AI text.
Zero-Width Joiner
Forces character joining. Commonly used in emoji sequences, exploited for watermarking.
Byte Order Mark
Originally for encoding detection. When embedded mid-text, serves as invisible watermark.
Word Joiner
Prevents line breaks. Invisible character used to mark AI-generated content.

Formatting Characters

Characters that affect text rendering or spacing without being visible.

Soft Hyphen
Marks where a word can break. Invisible unless line breaks at that point.
Combining Grapheme Joiner
Affects how characters combine. Used to invisibly mark text.
Function Application
Mathematical invisible operator. Repurposed as text watermark.
Invisible Times
Mathematical multiplication marker. Zero-width, used in watermarking.
Invisible Separator
Mathematical separator with no width. Hidden text marker.

Bidirectional Control

Characters that control text direction, often invisible and exploitable for watermarking.

Left-to-Right Mark
Forces left-to-right text direction. Invisible directional override.
Right-to-Left Mark
Forces right-to-left text direction. Hidden directional marker.
Directional Embeddings
Multiple characters that embed text direction. Invisible formatting controls.
Directional Overrides
Override text direction rendering. Hidden watermark characters.

Variation Selectors

Characters that modify how preceding characters render, often invisibly.

Standard Variation Selectors
Selectors that change character appearance. Often invisible modifications.
Extended Variation Selectors
Extended selectors for specialized use. Rarely used, suspicious when found in regular text.

Annotation Characters

Characters for interlinear annotations, invisible in most contexts.

Annotation Anchor
Marks annotation start. Invisible formatting character.
Annotation Separator
Separates annotation elements. Zero-width marker.
Annotation Terminator
Ends annotation. Hidden text marker.

Why Do AI Systems Add Watermarks?

Large language models like ChatGPT, Claude, and Gemini embed invisible watermarks to enable detection of AI-generated content. These watermarks use Unicode characters that have zero visual width but can be detected programmatically. Our API removes all known watermark patterns while preserving your text's meaning and formatting.

Platform Integration FAQ

Technical questions about bulk watermark removal

Enterprise-grade UGC watermark processing at scale

Let Users Create with AI. We'll Handle the Watermarks.

Bulk API processes 1000s of posts per hour. Webhook integration. Preserve formatting. Zero downtime. Your users create freely, we clean invisibly.

50/call
Bulk Processing
Webhooks
Async Support
100%
Format Preserved

Bulk API included • Process 50 posts per call • Enterprise scaling available