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API Reference / documents / stack-pages

Overlay one PDF onto another.

Merges each page of an overlay PDF on top of the matching base page (or reuses the last overlay page). Accepts URLs (`base`, `overlay`) or uploaded files plus optional `pages` selectors.

GETPOST/documents/stack-pages

Where this helper shines

Overlay one PDF onto another. keeps documents helpers on autopilot. Use it whenever you need to overlay one PDF onto another without pausing a sprint or asking design/dev to jump in.

  • Trigger this helper whenever you need to overlay one PDF onto another without waiting on a full deploy.
  • Drop it into automations (Zapier, Make, workers) to overlay one PDF onto another as part of your workflow.
  • Share the GET URL so support and success can overlay one PDF onto another safely using their Dataczar API key.

Copy & ship snippets

GET

Instant link

GET https://api.dataczar.app/documents/stack-pages?base=sample-base&overlay=sample-overlay&pages=all&dryrun=true&ak=demo

Open directly in any browser, webhook, or low-code workflow.

curl

curl GET

curl "https://api.dataczar.app/documents/stack-pages?base=sample-base&overlay=sample-overlay&pages=all&dryrun=true&ak=demo"

Swap ak=demo with your Dataczar API key.

curl

curl POST

curl -X POST "https://api.dataczar.app/documents/stack-pages?ak=demo" \
  -H 'Content-Type: application/json' \
  -d '{
  "base": "sample_base",
  "overlay": "sample_overlay",
  "pages": "sample_pages",
  "dryrun": true
}'

Send JSON payloads from back-end jobs, queues, or workers.

Parameters

Query Parameters

NameTypeDescription
basestringBase PDF URL.
overlaystringOverlay PDF URL.
pagesstringPage selector (all, first, last, odd, even, or ranges).
dryrunboolean

All helper calls accept your Dataczar key via the ak query parameter. Need one? Create or copy a key on Dataczar Connect and drop it into each request.

Responses

Status 200

Resulting PDF stream.

Examples

Request

"POST /pdf/stack-pages?pages=all&dryrun=1"

Response

{
  "ok": true,
  "data": {
    "summary": [
      "Overlay pages merged onto base PDF",
      "Pages selector: all"
    ]
  }
}

File uploads (multipart form-data)

Attach PDFs or images as multipart fields. We'll fill in the field names for you.

Files
base_file — Base PDF
overlay_file — Overlay PDF

Query parameters

Body parameters

We'll send these as JSON for POST/PUT/PATCH requests and as query params for GET.

Equivalent curl
Grab your Dataczar API key
Every helper runs with the same simple API key. Sign in (or create a free Dataczar account) at Dataczar Connect to issue keys in seconds, then drop the key into any `ak=` parameter and start shipping.
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Tip: reuse the same key across these helpers, or rotate keys per project from the Connect dashboard.