n8n SFTP Stock Sync to GoHighLevel & iPaper w/ Alerts

Automatically sync SFTP stock updates to GoHighLevel & iPaper—plus alerts for low inventory and validation issues

This n8n workflow downloads your daily stock CSV from an SFTP server, validates and transforms the data, syncs inventory to GoHighLevel and iPaper via HTTP, uploads an acknowledgement CSV back to SFTP, and sends email alerts when stock is critically low or rows fail validation.

What this workflow does

• Runs 3x daily on a cron schedule at 06:00, 14:00, and 22:00.
• Connects to your SFTP, lists /outbound/stock/, filters for .csv files, and downloads the matching stock file.
• Parses and validates CSV rows by checking required fields and ensuring numeric values are valid, while normalizing data types.
• Flags critically low stock: items with stock quantities of 10 or less trigger a low-stock alert email.
• Emails a validation error report whenever any rows fail validation.
• Syncs inventory updates to GoHighLevel and iPaper using authenticated HTTP requests, processing products in batches of 50 (in parallel).
• Creates an acknowledgement CSV for processed SKUs and uploads it to /inbound/acknowledgements/ on SFTP, then logs a completion summary.

Use cases

• Keep GoHighLevel and iPaper inventory aligned with a back-office or ERP export delivered via SFTP.
• Detect low-stock situations (≤10) automatically and notify your team by email.
• Reduce data errors by generating validation-error reports when incoming CSV rows are malformed or incomplete.

Technical details

• SFTP: uses SFTP listing, download, and upload for /outbound/stock/ and /inbound/acknowledgements/
• HTTP APIs: authenticated requests to GoHighLevel (GHL bearer token) and iPaper (API key)
• Email: sends low-stock and validation-error notifications
• Nodes / building blocks: if, ftp, code, filter, email send, sticky note
• Required environment variables: IPAPER_API_URL, GHL_BASE_URL, NOTIFY_FROM_EMAIL, NOTIFY_TO_EMAIL