Add watermark to PDF

Add a text watermark to one or multiple PDFs by uploading them to the Solutions API, polling until completion, then returning download URL(s) for the watermarked PDF(s) (or a ZIP if multiple).

Purpose

This skill adds a text watermark to one or multiple PDFs by:

1. accepting one or multiple PDF files from the user,
2. accepting a watermark text string,
3. uploading them to the Solutions API,
4. polling the job status until it is finished,
5. returning download URL(s) for the resulting file(s). If multiple PDFs are processed, the output may include multiple PDFs and/or a ZIP for download.

Credentials

The API requires an API key used as a Bearer token:

• Authorization: Bearer <API_KEY>

How the user gets an API key:

• https://login.cross-service-solutions.com/register
• Or the user can provide an API key directly.

Rule: never echo or log the API key.

API endpoints

Base URL:

• https://api.xss-cross-service-solutions.com/solutions/solutions

Create watermark job:

• POST /api/61
• multipart/form-data parameters:
  • files — required — multiple PDF files (multiple_files)
  • text — required — string (watermark text)

Get result by ID:

• GET /api/<ID>

When done, the response contains:

• output.files[] with { name, path } where path is a downloadable URL (PDFs and/or ZIP).

Inputs

Required

• One or more PDF files (binary)
• Watermark text (text, string)
• API key (string)

Optional

• None

Output

Return a structured result:

• job_id (number)
• status (string)
• outputs (array) containing { name, path } for each output file
• Convenience fields:
  • download_url (string) if exactly one output exists
  • download_urls (array of strings) for all outputs
• input_files (array of strings)
• watermark_text (string) — returned only if safe; do not return if user considers it sensitive

Example output:

{
  "job_id": 6101,
  "status": "done",
  "outputs": [
    { "name": "watermarked.pdf", "path": "https://.../watermarked.pdf" }
  ],
  "download_url": "https://.../watermarked.pdf",
  "download_urls": ["https://.../watermarked.pdf"],
  "input_files": ["input.pdf"]
}