Pdf Watermark

Developer REST API MCP network tool

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.

This page documents the MCP tool findutils:pdf_watermark. See the REST reference →

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

Use in the browser View as Markdown

Call it over MCP

Tool name findutils:pdf_watermark · no API keys · 120 requests/min per IP

Claude Code

claude mcp add findutils --transport http https://mcp.findutils.com/

Claude Desktop — claude_desktop_config.json

{
  "mcpServers": {
    "findutils": {
      "url": "https://mcp.findutils.com/"
    }
  }
}

Raw JSON-RPC (any MCP client) — verified example

curl -X POST https://mcp.findutils.com/ \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "pdf_watermark",
      "arguments": {
        "pdf": "JVBERi0xLjcK",
        "text": "CONFIDENTIAL"
      }
    }
  }'

Input schema

Argument	Type	Required	Description
pdf	string	yes	The base64-encoded PDF to stamp.
text	string	yes	The watermark text.
opacity	number	no	0 is invisible, 1 is solid. Default: 0.15. Default: 0.15.
rotation	integer	no	Degrees anticlockwise. Default: 45. Default: 45.
size	number	no	Font size in points. Default: 0, meaning fit to the page width. Default: 0.
color	string	no	Hex colour such as #808080. Default: #808080. Default: "#808080".
pages	string	no	Pages to stamp, 1-based: "1,3,5-8". Default: every page.

Example arguments (verified)

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

Also a REST endpoint

The same tool answers plain HTTP at POST /api/tools/pdf-watermark/execute — no key, 60 requests/min.

Open the REST reference for Pdf Watermark →

More Developer tools

A2ui Basic Catalog

Returns the authoritative basic-catalog JSON Schema (components, functions, theme) for the requested A2UI version.

A2ui Diff

Computes a structural diff between two A2UI JSONL payloads: surfaces added/removed, components added/removed/changed (by id), data-model pat

A2ui Examples

Returns one or more canonical A2UI JSONL examples matching a pattern (form, list, wizard, modal, chat, dashboard, checkout, typeahead, mcp-c

A2ui Prompt

Generates a drop-in LLM system prompt that teaches the model to output valid A2UI JSONL: includes the basic-catalog component / function lis

A2ui Spec

Returns A2UI protocol documentation for a given spec version and section.

A2ui Validate

Validates a JSONL A2UI payload against the basic catalog (or a custom catalog) and returns any errors, warnings, or info messages with exact

Ai Model Picker

Return the best-matching AI coding models (top 3 by default) for a project, scored on speed, accuracy, cost and context window from four ans

Aspect Ratio

Compute the aspect ratio of width:height.