SheetsToLabels API: Manual n8n Workflow for Print-Ready PDFs

Generate print-ready label PDFs from your data using the SheetsToLabels API (manual n8n workflow)

This n8n workflow lets you click “Test workflow” and instantly generate a print-ready PDF (labels, badges, or cards) from variable data by calling the SheetsToLabels API. The workflow returns the PDF as binary output you can store, email, or send to your print destination.

What this workflow does

• Runs manually: Start the flow by clicking Test workflow.
• Configures your SheetsToLabels request: Sets the template ID, layout type, sample variables, and a safe Idempotency-Key for retries.
• Builds the JSON payload: Creates the request body for /api/v1/generate-pdf using your selected layout and a single record of template variables (e.g., name, code, qrUrl).
• Calls the API securely: Sends a POST request to https://sheetstolabels.com/api/v1/generate-pdf using HTTP Header Auth.
• Returns the generated PDF: Outputs the resulting PDF as binary data.

Use cases

• Produce one-off shipping labels, attendee badges, or card inserts from dynamic variables.
• Manually generate print-ready documents during operations (e.g., label reprints) without setting up a fully automated pipeline.
• Provide a reliable way to test and validate a SheetsToLabels layout before integrating broader automation in n8n.

Technical details

• SheetsToLabels Business plan or an active API trial key from https://sheetstolabels.com/settings/apikeys
• Requires a cloud-synced Label Designer template and a matching templateId owned by the same account as your API key
• Uses these n8n nodes: Set, Code, Sticky Note, HTTP Request, and a Manual Trigger
• HTTP Auth: HTTP Header Auth with Authorization: Bearer <your SheetsToLabels API key>
• Idempotency: includes a stable Idempotency-Key to prevent duplicate charges on retries