🔬 Automatically sign PDFs from a watched Google Drive folder with PDF API Hub
⚡ 27 views · 🔬 Document Extraction & Analysis
Description
Auto E-Sign PDF — Google Drive Watcher
Automatically signs PDF documents the moment they land in a Google Drive folder — no manual steps needed. The signed output is routed to a Drive folder.
How it works
- Google Drive Trigger watches a folder every minute for newly created files
- Download file fetches the file from Drive into the workflow
- Config sets your signature URL, position (x/y), and output method (
driveoremail) - Is PDF? filters out non-PDF files — only PDFs proceed
- Sign a PDF overlays your signature image at the configured coordinates using PDF API Hub
- Output Router sends the signed PDF to Drive
- Log records the filename and signed status for auditing
Setup
Credentials
- Google Drive OAuth2 (trigger + download + upload nodes)
- PDF API Hub API key — sign up at pdfapihub.com
Configuration (in the Config node)
| Field | Description |
|---|---|
signature_url | Public URL to your PNG signature image |
sign_x / sign_y | Pixel coordinates for signature placement |
output | drive to save to Google Drive, email to send via email |
email | Recipient address (required only if output = email) |
Folder setup
- Set your watch folder in the Google Drive Trigger node
- Set your output folder in the Upload file node
Notes
- Signature image should be a PNG with a transparent background for best results
- Non-PDF files dropped into the watched folder are silently skipped
🔗 Nodes Used
Google Drive, Google Drive Trigger
📥 Import
Download workflow.json and import into n8n:
Workflow menu → Import from File