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HKHayrullah Karmagesheet-team.hashnode.dev5h ago · 7 min read

Build a WhatsApp Storefront in Google Sheets: OpenAI Function-Calling Tools (No Website)

A café owner asked me for an online store. She didn't want Shopify, a domain, a theme, or a $90/month bill — she wanted customers to message her on WhatsApp, ask what's available, and place an order.

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HKHayrullah Karmagesheet-team.hashnode.dev3d ago · 5 min read

Build a Real-Time Inventory Dashboard in Google Sheets: Reorder Points & Low-Stock Alerts

A marketing campaign works, 150 units sell in a day — and 40 were in stock. Now you have 110 angry customers, refunds, and a marketplace penalty for overselling. The campaign that was supposed to make

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HKHayrullah Karmagesheet-team.hashnode.dev3d ago · 6 min read

WhatsApp Automation for Small Businesses in 2026: AI Replies, Lead Capture & Tiered Commissions

Your customers would rather message you on WhatsApp than fill in a contact form. That's fine at ten conversations a day. At a hundred, messages get missed, nobody knows which rep is on which deal, and

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HKHayrullah Karmagesheet-team.hashnode.dev6d ago · 7 min read

Build a WhatsApp Sales Inbox in Google Sheets: Webhook, AI Lead Scoring & Rep Locking

Last month a client's two sales reps both spent an hour chasing the same WhatsApp lead. Neither closed it — the customer felt double-teamed and went quiet. Their "system" was one shared WhatsApp login

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HKHayrullah Karmagesheet-team.hashnode.devJul 11 · 3 min read

How We Turned WhatsApp Into a Mobile ERP for Field Logistics

Every field logistics team hits the same wall: the software nobody uses. You buy a shiny field-service app, and the drivers quietly refuse it. It's a heavy download, one more login to forget, and it c

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HKHayrullah Karmagesheet-team.hashnode.devJul 10 · 3 min read

How I Built a WhatsApp AI CRM in Google Sheets for ~$100/Month (Twilio + OpenAI)

Most businesses overpay for their CRM. You're paying $200–600 per seat, per month, for HubSpot or Salesforce — and your customers still wait hours for a WhatsApp reply because the "integration" is a r

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HKHayrullah Karmagesheet-team.hashnode.devJul 8 · 2 min read

Build an Unbreakable Inventory Web App with Google Sheets & Apps Script (Goodbye Chaos)

For any growing business selling physical products, Google Sheets is the go-to starting point. However, managing inventory inside a raw spreadsheet inevitably leads to operational chaos as the busines

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HKHayrullah Karmagesheet-team.hashnode.devJul 6 · 3 min read

Beyond the Grid: Building Secure, Zero-Cost B2B Client Portals on Google Sheets

Every growing B2B organization eventually hits the same operational barrier: how do you share critical, row-level transactional data with an external client without exposing the rest of your corporate

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HKHayrullah Karmagesheet-team.hashnode.devJul 4 · 3 min read

Stateless No More: Implementing Secure Token-Based Authentication in Apps Script Web Apps

When expanding Google Workspace into a genuine production-grade business platform, developers frequently run into a major architectural roadblock: state management. Google Apps Script’s underlying use

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HKHayrullah Karmagesheet-team.hashnode.devJul 1 · 2 min read

Decouple Your Data: Building Custom Web Applications on Top of Google Sheets

Most tutorials treat Google Apps Script as a basic macro engine for changing cell colors or summing columns. But hiding behind the standard grid layout is a powerful, production-grade cloud infrastruc

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Trending tags this week

Build a WhatsApp Storefront in Google Sheets: OpenAI Function-Calling Tools (No Website)

Build a Real-Time Inventory Dashboard in Google Sheets: Reorder Points &amp; Low-Stock Alerts

WhatsApp Automation for Small Businesses in 2026: AI Replies, Lead Capture &amp; Tiered Commissions

Build a WhatsApp Sales Inbox in Google Sheets: Webhook, AI Lead Scoring &amp; Rep Locking

How We Turned WhatsApp Into a Mobile ERP for Field Logistics

How I Built a WhatsApp AI CRM in Google Sheets for ~$100/Month (Twilio + OpenAI)

Build an Unbreakable Inventory Web App with Google Sheets & Apps Script (Goodbye Chaos)

Beyond the Grid: Building Secure, Zero-Cost B2B Client Portals on Google Sheets

Stateless No More: Implementing Secure Token-Based Authentication in Apps Script Web Apps

Decouple Your Data: Building Custom Web Applications on Top of Google Sheets

Build a Real-Time Inventory Dashboard in Google Sheets: Reorder Points & Low-Stock Alerts

WhatsApp Automation for Small Businesses in 2026: AI Replies, Lead Capture & Tiered Commissions

Build a WhatsApp Sales Inbox in Google Sheets: Webhook, AI Lead Scoring & Rep Locking