Pdf Watermark API

Network tool

POST https://api.findutils.com/api/tools/pdf-watermark/execute

Stamp text across the pages of a PDF — CONFIDENTIAL, DRAFT, a company name. The text is drawn centred and rotated over the existing content at the opacity you choose, so the page underneath stays readable. Input and output are base64-encoded PDFs. This is a visual mark, not a security control: anyone can remove it with the same kind of tool.

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Request body

application/json

pdf

string required

The base64-encoded PDF to stamp.
text

string required

The watermark text.
opacity

number optional

0 is invisible, 1 is solid. Default: 0.15. Default 0.15.
rotation

integer optional

Degrees anticlockwise. Default: 45. Default 45.
size

number optional

Font size in points. Default: 0, meaning fit to the page width. Default 0.
color

string optional

Hex colour such as #808080. Default: #808080. Default "#808080".
pages

string optional

Pages to stamp, 1-based: "1,3,5-8". Default: every page.

Example arguments

Verified

{
  "pdf": "JVBERi0xLjcK",
  "text": "CONFIDENTIAL"
}

curl -X POST https://api.findutils.com/api/tools/pdf-watermark/execute \
  -H "Content-Type: application/json" \
  -d '{
    "pdf": "JVBERi0xLjcK",
    "text": "CONFIDENTIAL"
  }'

const response = await fetch('https://api.findutils.com/api/tools/pdf-watermark/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({"pdf":"JVBERi0xLjcK","text":"CONFIDENTIAL"}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/pdf-watermark/execute",
    json={"pdf":"JVBERi0xLjcK","text":"CONFIDENTIAL"},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/pdf-watermark/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"pdf":"JVBERi0xLjcK","text":"CONFIDENTIAL"}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call pdf_watermark from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: None
REST id: pdf-watermark
MCP name: pdf_watermark
Category: Documents
Machine-readable: openapi.json · markdown.md

This tool fetches a fixed, hard-coded public upstream, never a private host. Results depend on that upstream.

Request body

Example arguments

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