Input JSON
{
"operation": "merge",
"files": [
{
"file_base64": "PDF file, 1.3 KB, base64 in the real request"
},
{
"file_base64": "PDF file, 902 bytes, base64 in the real request"
}
]
}Merge PDF files
Merge a two-page inventory PDF and a one-page stock summary into one three-page PDF.
Captured output JSON
{
"operation": "merge",
"source": "upload",
"bytes_in": 2225,
"files_in": [
{
"source": "upload",
"bytes": 1323,
"pages": 2
},
{
"source": "upload",
"bytes": 902,
"pages": 1
}
],
"pages_in": 3,
"pages_out": 3,
"bytes": 1755,
"content_type": "application/pdf",
"file_base64": "PDF file, 1.7 KB, base64 in the real response",
"limits": {
"max_input_bytes": 6291456,
"max_total_input_bytes": 12582912,
"max_output_bytes": 2500000,
"max_text_bytes": 1000000,
"max_merge_files": 10,
"max_split_files": 20,
"max_pages_selected": 2000,
"max_png_pages": 10,
"max_pixels_per_page": 4000000,
"max_decompressed_bytes": 33554432,
"max_render_decompressed_bytes": 8388608,
"png_scale_range": [
0.1,
5
],
"effective_max_input_bytes": 2500000,
"effective_input_note": "merge returns one produced file, so the binding limit is max_output_bytes (2500000 bytes), not max_input_bytes. A document larger than that comes back as output_too_large (413) however it was sent, so the combined size of the files being merged has to fit too."
},
"source_note": "Read from the PDF file itself — its page tree, its Info dictionary and its content streams. Metadata strings such as producer, creator, title and author are what the tool that wrote the file put there; they describe the document, are not checked against anything, and are general information only.",
"checked_at": "2026-10-20T20:47:49.523Z"
}API call
curl -s -X POST https://getattest.com.au/api/v1/pdf \
-H "authorization: Bearer $ATTEST_API_KEY" \
-H "content-type: application/json" \
--data-binary @request.jsonRun this call with your own bearer key. Save the complete input as request.json, replacing file descriptions with your own base64 file content and any truncated text with the full text. Issue an API key.
About this example
The input was validated and run locally through the registered service. The output above is a display preview of the captured service result. File bytes are described instead of printed, and strings longer than 400 characters are truncated; the HTTP API also adds call_id, credits_charged and credits_remaining. Timestamps and generated identifiers will vary.
Source: apps/api/svc/pdf_tools.mjs