Why pay $30/month per user for e-signature SaaS platforms when you can build a lightweight, secure document signing workflow using Google Apps Script, Drive Webhooks, and cryptographic SHA-256 verification?
🔑 The Architecture
- Document Injection: PDF uploaded to a secure Google Drive folder.
- Webhook Trigger: Google Apps Script catches the upload event, generates a unique time-stamped signature token, and emails the signer.
- Verification: Signer approves via a lightweight web app interface; the script appends a cryptographic hash audit trail to the PDF metadata.
Zero monthly subscription fees, total privacy control, and 100% automated workflows. 📜