This article provides a complete, practical walkthrough of the Googlesheets Gmail Create Triggered n8n agent. It connects HTTP Request, Webhook across approximately 1 node(s). Expect a Intermediate setup in 15-45 minutes. One‑time purchase: €29.

What This Agent Does

This agent orchestrates a reliable automation between HTTP Request, Webhook, handling triggers, data enrichment, and delivery with guardrails for errors and rate limits.

It streamlines multi‑step processes that would otherwise require manual exports, spreadsheet cleanup, and repeated API requests. By centralizing logic in n8n, it reduces context switching, lowers error rates, and ensures consistent results across teams.

Typical outcomes include faster lead handoffs, automated notifications, accurate data synchronization, and better visibility via execution logs and optional Slack/Email alerts.

How It Works

The workflow uses standard n8n building blocks like Webhook or Schedule triggers, HTTP Request for API calls, and control nodes (IF, Merge, Set) to validate inputs, branch on conditions, and format outputs. Retries and timeouts improve resilience, while credentials keep secrets safe.

Third‑Party Integrations

• HTTP Request
• Webhook

Import and Use in n8n

1. Open n8n and create a new workflow or collection.
2. Choose Import from File or Paste JSON.
3. Paste the JSON below, then click Import.
4. Show n8n JSON

   Title:
   Automating Invoice Management with n8n: Storing Gmail Attachments to Google Drive by Company and Date
   
   Meta Description:
   Learn how to automate invoice processing using n8n. This workflow checks Gmail for whitelisted senders, identifies attachments, and auto-organizes them in Google Drive folders by company and date.
   
   Keywords:
   n8n workflow, Gmail automation, Google Drive integration, invoice archiving, automated email attachment upload, Google Sheets whitelist, no-code automation, email-to-Drive workflow, document management automation, Gmail attachment handler
   
   Third-Party APIs Used:
   
   - Gmail API (via Gmail Trigger and Gmail node)
   - Google Drive API (for folder searches, creation, and file uploads)
   - Google Sheets API (for email whitelist lookups)
   
   Article:
   
   Automating Invoice Processing with n8n: Organize Gmail Attachments by Company and Date in Google Drive
   
   Manually downloading invoice attachments from Gmail, verifying the sender, organizing them into folders by client and year-month — it’s all time-consuming and error-prone. But what if this entire process could be automated? With n8n, a powerful open-source workflow automation tool, you can set up an intelligent system to automatically capture email attachments, verify their source, and store them neatly in your Google Drive.
   
   This article walks you through a custom-built n8n workflow that lets you streamline invoice and receipt management by organizing files by company and by month, while filtering senders using a Google Sheets whitelist. We’ll also explore how key integrations like Gmail, Google Drive, and Google Sheets tie in to make it all work.
   
   📬 Step 1: Listening for New Emails in Gmail
   
   The process starts with the Gmail Trigger node. It polls Gmail every 15 minutes for new messages that have a specific label — usually filtered emails with invoice-related keywords and attachments. Gmail filtering ensures that only relevant emails enter the workflow.
   
   💡 Pro Tip: You can create this label filter in Gmail by searching for emails with attachments that contain words like “invoice” or “receipt,” and attaching a label to those.
   
   📋 Step 2: Validating Against a Whitelist via Google Sheets
   
   To ensure we only store attachments from approved senders, the workflow uses the "Lookup in Sheets" node. This checks the "from" email address of the message against a Google Sheet named “Contacts Whitelist.” This sheet contains rows of email addresses and the corresponding company names.
   
   Only if the sender is listed does the workflow continue — a solid way to automate with safeguards against spam or rogue attachments.
   
   📁 Step 3: Check or Create Destination Folders in Google Drive
   
   Once a valid email is found, the workflow constructs the storage folder path in Google Drive based on the sender's company and the received date (formatted as `YYYY/MM`). Here's how it’s built:
   
   - First, it checks if a folder for the sender's company already exists inside a parent folder named “Invoices.”
     - If not, it automatically creates the company folder.
   - Then, it creates (or verifies) a sub-folder inside the company folder for the year and month based on when the email was received.
     - For example: Invoices > AcmeCorp > 2024/06
   
   This hierarchical structure organizes attachments in a way that’s intuitive and easy to browse.
   
   📎 Step 4: Downloading and Preparing the Attachments
   
   With folder organization handled, the Gmail node fetches the full message and downloads its attachments. The workflow uses a “Function” node to “Split Up Binary Data” — turning multi-attachment messages into multiple items where each item contains a single file stream.
   
   Each file is renamed by prefixing its filename with a timestamp to avoid naming conflicts inside folders.
   
   ☁️ Step 5: Uploading Files to Google Drive
   
   Finally, the files are uploaded to the appropriate Google Drive folder — using either an existing one or the newly created `YYYY/MM` folder — via the Upload To Folder node.
   
   As a bonus, the workflow attaches useful metadata to each file, such as:
   
   - Email sender’s address
   - Time the email was received
   
   This metadata is stored as custom properties in Google Drive, helping with future search and logging.
   
   💼 Why This Matters
   
   - Time-Saving: Automating downloads, verification, and uploads cuts out manual labor.
   - Organized Cloud Storage: Files are stored logically (by company and date), making them easy to retrieve.
   - Audit-Ready: Metadata tied to every file makes future tracking and auditing simple.
   - Scalable: Add more senders to your whitelist to grow the system with your operations.
   
   🔌 APIs & Integrations at Work
   
   This automation leverages several powerful third-party APIs through n8n nodes:
   
   - Gmail API: To listen for emails and download message details/attachments
   - Google Drive API: To search, create folders, and upload files
   - Google Sheets API: To validate senders against a company whitelist spreadsheet
   
   ⏳ Wrap-Up
   
   This n8n workflow is a powerful example of what no-code automation can achieve. By combining Gmail, Google Sheets, and Google Drive, it creates a smart back-office automation that reduces workload, minimizes error, and increases organizational efficiency.
   
   Whether you're a freelancer managing clients, a small business handling admin, or an enterprise scaling document intake — this type of workflow is a game-changer.
   
   ✅ Next Steps:
   
   - Set up Gmail filters with meaningful labels.
   - Customize a Google Sheet with your approved email contacts.
   - Deploy this workflow in n8n and let automation handle the rest.
   
   Your future self — or your accounting department — will thank you.
   
   ⚙️ Want to give it a try? Head to n8n.io and start building this workflow today.

5. Set credentials for each API node (keys, OAuth) in Credentials.
6. Run a test via Execute Workflow. Inspect Run Data, then adjust parameters.
7. Enable the workflow to run on schedule, webhook, or triggers as configured.

Tips: keep secrets in credentials, add retries and timeouts on HTTP nodes, implement error notifications, and paginate large API fetches.

Validation: use IF/Code nodes to sanitize inputs and guard against empty payloads.

Why Automate This with AI Agents

AI‑assisted automations offload repetitive, error‑prone tasks to a predictable workflow. Instead of manual copy‑paste and ad‑hoc scripts, your team gets a governed pipeline with versioned state, auditability, and observable runs.

n8n’s node graph makes data flow transparent while AI‑powered enrichment (classification, extraction, summarization) boosts throughput and consistency. Teams reclaim time, reduce operational costs, and standardize best practices without sacrificing flexibility.

Compared to one‑off integrations, an AI agent is easier to extend: swap APIs, add filters, or bolt on notifications without rewriting everything. You get reliability, control, and a faster path from idea to production.

Best Practices

• Credentials: restrict scopes and rotate tokens regularly.
• Resilience: configure retries, timeouts, and backoff for API nodes.
• Data Quality: validate inputs; normalize fields early to reduce downstream branching.
• Performance: batch records and paginate for large datasets.
• Observability: add failure alerts (Email/Slack) and persistent logs for auditing.
• Security: avoid sensitive data in logs; use environment variables and n8n credentials.

FAQs

Can I swap integrations later? Yes. Replace or add nodes and re‑map fields without rebuilding the whole flow.

How do I monitor failures? Use Execution logs and add notifications on the Error Trigger path.

Does it scale? Use queues, batching, and sub‑workflows to split responsibilities and control load.

Is my data safe? Keep secrets in Credentials, restrict token scopes, and review access logs.