You use the WhatsApp Business app. Every order confirmation and status update has to be typed by hand, and one person holds all the conversations on their phone. If that person is busy, updates wait. There is no way to trigger a message automatically when an order event happens in your system. The WhatsApp Business API is the version of WhatsApp that makes automation possible - and this is what it does.
This guide explains what the WhatsApp Business API is, how it differs from the app you already use, what it costs, and how to get your number connected - written for business owners, not developers.
WhatsApp Business App vs WhatsApp Business API
There are two separate products from Meta for businesses. Most Sri Lankan businesses use the app. The API is what powers automatic notification platforms like Ceytrex Flow.
| Feature | WhatsApp Business App | WhatsApp Business API |
|---|---|---|
| Access | Mobile app (phone-based) | Triggered by any system with an API |
| Order confirmation | Typed manually, every time | Sent automatically on the order event |
| Status updates | Manual, easy to forget | Automatic - preparing → shipped → delivered |
| Reminders | Manual labels only | Scheduled automatically, no human step |
| Message templates | Quick replies only | Unlimited Meta-approved templates |
| Broadcast messaging | Up to 256 contacts | Unlimited (with opt-in), metered separately |
| Delivery visibility | None | Sent/delivered/read status per notification |
| Cost per message | Free (manual typing) | ≈ Rs 0.66 per Utility notification |
| Desktop access | WhatsApp Web only (mirrored) | No dashboard needed - event-triggered |
| Automation | None | Event-triggered, template-based sending |
The WhatsApp Business app is designed for a single person managing a small number of conversations manually. The WhatsApp Business API is what makes it possible to send an order update automatically, the instant something happens in your system.
What the WhatsApp Business API Actually Unlocks
Connecting your WhatsApp number to the API does not change anything visible to your customers. They still message the same number. The difference is entirely in what happens on your end - in the platform that receives and manages those messages.
- Event-triggered sending - your order or booking system tells the API something happened, and the right message goes out automatically
- Meta-approved templates - structured messages you can send outside the 24-hour customer service window, for confirmations, status updates, reminders, and receipts
- Automated confirmations - acknowledge every order the moment it is placed, even outside working hours, before a customer has a reason to ask if it went through
- Delivery visibility - sent, delivered, and read status for every notification, so you know what actually reached the customer
- Cheap by design - transactional messages tied to a real event qualify for WhatsApp's cheapest Utility rate (≈ Rs 0.66/message), not the Marketing rate
- Webhook integrations - connect your order/booking system to the API via a single event endpoint
How Much Does the WhatsApp Business API Cost?
Since 1 October 2026, Meta bills per message rather than per 24-hour conversation window, on Sri Lanka's own standalone rate card. Charges vary by message category.
| Message Category | What Triggers It | Approx. Cost (LKR/message) |
|---|---|---|
| Utility | Order confirmation, status update, reminder, receipt | ≈ Rs 0.66 |
| Authentication (domestic) | OTP or verification messages | ≈ Rs 0.66 |
| Authentication (international) | OTP sent to a non-Sri Lankan number | ≈ Rs 47.25 |
| Service | Free-form reply inside the 24h customer service window | ≈ Rs 0.66 (first 1,000/number/month free) |
| Marketing | Promotional/broadcast content | ≈ Rs 24.02 |
For most Sri Lankan SMEs sending order/booking notifications - the Utility category - the Meta cost is genuinely low: a business sending 1,000 notifications a month is looking at roughly Rs 660 in Meta charges. Marketing messages cost about 36x more and are not something an order-notification platform should be sending on the same templates.
Because Ceytrex Flow only ever sends messages triggered by a real order or booking event - never promotional content through the same templates - every notification stays classified (and priced) as Utility, not Marketing.
On top of Meta's per-message charges, you pay for the platform you use to access the API - such as Ceytrex Flow. This is where the event webhook, template management, and delivery tracking live.
How to Get the WhatsApp Business API - Step by Step
The setup process involves Meta's Business Verification and connecting to a Business Solution Provider (BSP) - a Meta-approved platform that handles the API integration. Ceytrex Flow is built on the Meta Cloud API, which means the technical connection is managed for you.
- Step 1 - Create a Meta Business Manager account at business.facebook.com. This is separate from your personal Facebook account and your business Facebook page.
- Step 2 - Complete Meta Business Verification. This confirms you are a legitimate business. You will need your business registration certificate or other official documentation. Verification takes 1–3 business days in most cases.
- Step 3 - Add a phone number to your WhatsApp Business Platform. This number must not be currently active on any WhatsApp account (personal or Business app). If your number is on the Business app, you will need to delete the app account first.
- Step 4 - Connect your number to Ceytrex Flow. This is done through a guided setup - you authorise Ceytrex Flow to access your WhatsApp Business number via the Meta Cloud API. Takes under 10 minutes.
- Step 5 - Verify your number. Meta will call or SMS the number with a verification code. Enter it in the setup flow.
- Step 6 - Your number is live on the API. All new incoming messages appear in your Ceytrex Flow dashboard. Your customers continue messaging the same number - nothing changes from their side.
What You Need Before You Start
- A Meta Business Manager account (business.facebook.com) - not a personal account
- A Facebook page linked to your business (required for Business Manager)
- A phone number that is not currently active on any WhatsApp account - personal or Business app
- Your business registration certificate or NIC for Meta Business Verification
- A Ceytrex Flow account - our team will walk you through the connection process
If your current WhatsApp Business app number is the number you want to use, you will need to delete the WhatsApp Business app account for that number before connecting it to the API. Your message history on the app will be lost, but all future conversations will be managed through your Ceytrex Flow dashboard. Your customers experience no interruption - they continue messaging the same number.
What Ceytrex Labs Handles for You
When you sign up for Ceytrex Flow, our team walks you through the Meta Business Manager setup, helps with the number connection process, and verifies that your API integration is live and working. From there, wiring your order or booking system's events to Flow's webhook is the last step before notifications start sending automatically.
The technical setup is our responsibility. Your number should be live on the API within one business day of starting the process - not something you are troubleshooting on your own.
What Changed in WhatsApp Business API Onboarding for 2026
The core onboarding process described above - Business Manager account, Business Verification, number registration, connecting through a provider like Ceytrex Flow - has kept the same overall shape through 2025 and into 2026. Nothing publicly suggests Meta has restructured the fundamentals of how a business gets onto the Cloud API. That said, Meta owns and operates this process directly, and it is the kind of platform detail that can shift with limited notice, so treat the steps in this guide as accurate as of our last review rather than a permanent guarantee - our team re-verifies the setup flow with every new client, which is the best way to catch a change before it becomes a problem.
The question we get most often in 2026 is not about the API itself but about the WhatsApp green tick - the official verified badge Meta displays next to a business name in chat. As far as we have seen, the green tick remains a separate program from basic API access, and businesses we work with are commonly live on the API - sending and receiving messages - without it. We have not seen anything publicly indicating Meta has changed its green-tick eligibility criteria or review process this year, but since Meta controls that program on its own timeline, we treat any specific requirement or turnaround time as a snapshot rather than a fixed rule. For the current breakdown of what green-tick verification involves and how to apply for it, see our dedicated guide, How to Get the WhatsApp Green Tick for Your Sri Lankan Business.
In our experience so far, green tick or not, a WhatsApp Business API number works the same way for sending automatic order notifications - the badge appears to affect how your business looks to a customer opening the chat, not whether the API itself functions. If that ever changes on Meta's side, we will update this guide.
Get your WhatsApp number on the API - we handle the setup.
Ceytrex Flow connects your WhatsApp Business number and sends order confirmations, status updates, and reminders automatically. Setup takes one business day.
Frequently Asked Questions
Can I keep my existing WhatsApp Business app number when switching to the API?
Yes, you can use the same number. However, you must first delete the WhatsApp Business app account associated with that number. The app and the API cannot run on the same number simultaneously. Your chat history on the app will not carry over to the API platform.
Do I need to be a developer to set up the WhatsApp Business API?
No. Through Ceytrex Flow, the technical setup is handled by our team. You need to create a Meta Business Manager account and complete business verification - our team guides you through every step.
How long does Meta Business Verification take?
Typically 1–3 business days if your documents are complete and match your business details. Incomplete submissions or name mismatches can delay the process. Our team reviews your documents before submission to minimise back-and-forth with Meta.
Will my customers know I switched from the WhatsApp Business app to the API?
No. From your customer's side, nothing changes. They message the same number and the conversation looks identical. The difference is entirely in how you manage and respond to those messages on your end.
Are there any message types the API does not support?
The API supports text, images, documents, audio (voice notes), video, and location messages - the same types available in the WhatsApp Business app. Stickers are supported for receiving but have limitations for sending via templates.
What happens to my WhatsApp number if I stop using Ceytrex Flow?
Your WhatsApp number remains yours. You can disconnect it from Ceytrex Flow and either reconnect it to another platform or reactivate it on the WhatsApp Business app. The number is not locked to any platform.
Do I need the WhatsApp green tick to get onto the Business API?
As far as we have seen, no - the green tick is a separate Meta verification program from basic API access, and we commonly see businesses connect their number to Ceytrex Flow and start sending notifications without it. Some businesses pursue the green tick afterward for the visual trust signal it gives customers browsing the chat. See our dedicated guide, How to Get the WhatsApp Green Tick for Your Sri Lankan Business, for what that separate process currently involves.
Has anything about WhatsApp Business API onboarding changed in 2026?
The overall shape of the process - Business Manager, Business Verification, number registration, provider connection - has stayed consistent through 2025 and into 2026, and nothing publicly suggests Meta has overhauled it. Because Meta runs this process on its own schedule, we do not treat any single step or timeline as permanently fixed - our team checks the live setup flow with every new client rather than relying on older documentation.
