callas pdfToolbox REST Node for n8n: 9 operations for PDF processing

The callas pdfToolbox REST Node is an n8n community node by 3f8h.net for direct integration with the pdfToolbox REST API by callas software. Preflight, conversion, splitting, layer operations: all available as clean nodes in your n8n workflow, without HTTP request boilerplate. Async polling, error handling, cloud compatibility are pre-configured.

What can the node do?

Nine operations across three resources, covering most pdfToolbox REST workflows:

  • Preflight: PDF validation and correction against a profile, with fixups and reports in JSON or PDF format
  • Preflight Vars: preflight with variable substitution for dynamic profiles
  • Save As Image: convert PDF to raster images (previews, thumbnails, print proofs)
  • Split Layers: split PDF by layers
  • Dieline: dieline extraction for packaging design
  • Split At Mark: split PDF at marker positions
  • Result Get: retrieve processing result
  • Result Delete: remove result from server cache
  • Operation List: query all available operations with parameter schema

Typical use cases

  • Automated preflight in publishing workflows: validate and correct incoming PDFs with fixups, catch errors early, return reports to editorial or agency
  • PDF-to-image conversion in asset pipelines: generate previews, thumbnails or print proofs from print-ready PDFs, store directly in your DAM
  • Packaging design automation: extract dielines, layer operations for cutting and folding lines, prepare files for production
  • PDF splitting for print production: split multi-page PDFs at marks or layer boundaries, route individual documents to printing presses
  • Cloud-first workflows: everything URL-based, no local files, ideal for n8n Cloud and distributed setups

Pipeline with the WoodWing Assets Node

Both nodes are 3f8h.net custom builds, designed to work together. A pipeline of WoodWing Assets Node and callas pdfToolbox REST Node is the gold standard for publishers and agencies:

  1. WoodWing Assets returns a download URL via Asset operation (presigned, signed)
  2. callas pdfToolbox REST Node processes the URL directly: preflight, conversion or splitting
  3. The result is written back as asset metadata or as a new asset version, again through the WoodWing node

Complete pipeline without intermediate steps, without binary handling, without local file caching.

Technical details

  • callas pdfToolbox REST API: cloud service or pdfToolbox 17 with Docker and REST mode
  • n8n 1.0.0 or newer
  • n8n Cloud compatible, zero runtime dependencies
  • API key authentication, securely stored in n8n credentials
  • File input via URL, no multipart uploads (modern cloud architecture)
  • Async polling with Wait for completion toggle: honors ms_retry_after, clamped to 1 to 60 seconds, default max wait 600 seconds
  • Extended logging with ISO timestamps and custom prefix, easy to find in n8n log
  • Debug mode with detailed request and response info for troubleshooting

MIT license, fair-use free

The node runs technically unrestricted, with or without a license key. All 9 operations work without limitation. No tracking, no phone-home, no remote calls. We rely on the honor system.

License for production use

Anyone using the node in production can purchase a commercial license. More important than the license banner: the license funds maintenance and support. Specifically, this means for you:

  • Active maintenance with adaptation to new versions of the callas pdfToolbox REST API
  • New operations, as soon as the REST API is extended
  • Bug fixes with priority, ahead of the queue in the open-source backlog
  • Direct support from the 3f8h.net team with callas and n8n expertise
  • n8n update compatibility, tested and verified before each release

Free for pdfToolbox customers of 3f8h.net / electronic publishing

If you have licensed pdfToolbox, pdfToolbox Server or pdfToolbox CLI through us, the node license is included for you. No surcharge, no separate agreement. We see this as a natural part of our callas care.

Installation

The package is available on npm as @3f8h/n8n-nodes-callas-pdftoolbox-rest. Installation via the official n8n community nodes documentation.

Who builds this node?

3f8h.net / electronic publishing builds and maintains this node. We are callas Gold Partner and Integration Specialist for nearly two decades, with deep expertise in PDF workflows, prepress and publishing production.

  • Nearly two decades of callas experience as reseller, consultant and implementer
  • Custom n8n nodes for WoodWing Assets and the callas pdfToolbox REST API
  • Deep domain knowledge: publishing, prepress, editorial production

More on our callas expertise: pdfToolbox, pdfChip, pdfaPilot by callas software. More on callas and Durst: callas software becomes part of the Durst Group. More on n8n: n8n in publishing.

Request commercial license