Share time-limited preview links with UploadToURL, SendGrid, and Google Sheets

Stop sending sensitive agency drafts as permanent email attachments. This workflow creates a "self-destructing" delivery system that hosts files via UploadToURL, sends branded previews via SendGrid, and automatically expires access after a set duration while logging the entire lifecycle in Google Sheets.

🎯 What This Workflow Does

Turns any sensitive file into a professional, time-limited client preview:

1. 📝 Captures Delivery Request - Receives the file (binary or URL), recipient info, and desired expiry duration (e.g., 24 hours) via Webhook.
2. ☁️ Instant CDN Hosting - UploadToURL hosts the asset and returns a high-speed public link.
3. 🔑 Secure Token Generation - Generates a unique hex token and calculates the exact UTC expiry timestamp.
4. 📊 Real-time Logging - Records the link in Google Sheets as active with all metadata before the email is sent.
5. 📧 Branded Delivery - Sends a professional HTML email via SendGrid featuring your branding, a secure "View File" button, and a clear expiry notice.
6. ⏳ Automated Expiration - Pauses execution for the specified duration using the Wait node, then updates the sheet to expired and notifies both the client and the agency.

✨ Key Features

• UploadToURL Integration: Native community node hosting ensures your files are web-ready instantly without manual cloud storage setup.
• Dynamic "Burner" Logic: The link stays active only as long as you specify (from 1 to 168 hours).
• Dual-Phase Notifications: Clients get a polite notice when the link is active and a second one when it has officially expired.
• Lifecycle Tracking: A centralized Google Sheet acts as your "Delivery Command Center," tracking tokens, sent times, and expiry statuses.
• Agency Audit Trail: The agency receives a final summary email once a link's lifecycle is complete, providing a full record for project management.

💼 Perfect For

• Creative Agencies: Sharing draft designs, videos, or proposals that shouldn't live in a client's inbox forever.
• Legal & Finance: Providing temporary access to sensitive documents or statements.
• Freelancers: Delivering final assets that require a "preview-only" window before final payment.
• HR Teams: Sending temporary access to employee handbooks or internal policy drafts.

🔧 What You'll Need

Required Integrations

• UploadToURL - To host assets and provide secure CDN links.
• n8n Community Node - n8n-nodes-uploadtourl must be installed.
• SendGrid - To send the branded preview and expiry emails.
• Google Sheets - To act as the database for link tracking.

Configuration Variables

• GSHEET_SPREADSHEET_ID: The ID of your tracking sheet.
• DEFAULT_EXPIRY_HOURS: Default time (e.g., 24) if not specified in the webhook.
• AGENCY_NAME & AGENCY_EMAIL: For branding the automated emails.

🚀 Quick Start

1. Import Template - Copy the JSON and import it into your n8n canvas.
2. Install Node - Ensure the UploadToURL community node is installed.
3. Set Credentials - Link your UploadToURL, SendGrid, and Google Sheets accounts.
4. Prepare Sheet - Create a sheet named BurnerLinks with columns: Token, Recipient Email, Status, Sent At, Expires At, and CDN URL.
5. Define Variables - Update the n8n variables with your Sheet ID and Agency details.
6. Deploy - Activate the workflow and start sending secure, timed previews.

🎨 Customization Options

• Branding: Edit the Generate Link Record code node to update the HTML/CSS for the email templates to match your brand colors.
• Extended Wait: For links lasting weeks, ensure your n8n instance is configured to persist executions across restarts.
• Slack Alerts: Add a Slack node to notify your team the moment a client clicks the link (requires a redirect/tracking layer).
• Password Protection: Integrate an additional layer that requires a password (sent via a separate channel) to view the UploadToURL link.

📈 Expected Results

• Enhanced Security: Sensitive files no longer float around indefinitely in client inboxes.
• Professional Impression: Clients receive branded, structured previews that emphasize security and professionalism.
• Zero Manual Cleanup: No need to manually delete files or remember to "turn off" links.
• Complete Transparency: Always know exactly which links are active and when they were accessed.

🏆 Use Cases

Pitch Deck Delivery

Send your high-stakes pitch deck with a 48-hour window. The urgency encourages the client to review it promptly while protecting your IP.

Contract Previews

Share a draft agreement for a quick 24-hour review. Once the window closes, the client is prompted to contact you for the final version.

Limited-Time Portfolio

Share a custom portfolio or "lookbook" with a lead, giving them 7 days of access to create a "limited time" feel to your availability.

💡 Pro Tips

• Wait Node Execution: Each link runs as a separate execution. If you send 100 links, you will see 100 "Waiting" executions in your history.
• File Types: The workflow includes validation for PDF, JPG, PNG, DOCX, and MP4. You can expand this in the Validate Payload code node.
• BCC Records: The workflow automatically BCCs the agency on the first email so you have a copy in your own sent folder.

Ready to secure your deliveries? Import this template and connect UploadToURL to start sending professional "burner" links today.

Questions about the Google Sheet setup? The workflow includes a detailed sticky note explaining the exact column headers needed for the database sync.