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WhatsApp Business API

Reach every customer on the app they never close.

Send campaigns, updates and reminders over the official WhatsApp Business API — delivered to the chat your customers already check every day, with read receipts and instant replies.

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What it is

Business messaging, the official way.

The WhatsApp Business API is Meta's official channel for businesses to message customers at scale — not the regular app on a single phone. Your number gets verified, a green business tick, approved templates, and the ability for a whole team to send and reply from one workspace.

01

Official & verified

A verified business number and display name, approved by Meta — trusted, not flagged as spam.

02

Built for scale

Reach thousands of opted-in customers with approved templates — far beyond the limits of the regular app.

03

A team, not a phone

Your whole team sends and replies from one shared inbox — no single device, no shared password.

How it works

From number to first campaign in days.

1

Connect your number

Pick a number not on the regular WhatsApp app. Mersal guides you through Meta verification and the green tick.

2

Get templates approved

Create message templates for your campaigns and notifications. Meta reviews and approves them — usually fast.

3

Launch & automate

Send campaigns to opted-in audiences and let chatbots and automations handle the routine replies.

4

Manage every reply

Customer responses land in one shared inbox with ownership, quick replies and reporting.

Message types

Three ways to start a conversation.

Conversations you start use an approved template. Pricing depends on the template category.

Marketing

Promotions & campaigns

Offers, launches, newsletters and re-engagement to customers who opted in.

“25% off this week — shop your favourites before Sunday.”
Utility

Updates & notifications

Order, shipping, booking and account updates tied to a specific action.

“Your order #1842 is confirmed and out for delivery today.”
Authentication

One-time passwords

Secure login codes and verification, delivered reliably in seconds.

“Your verification code is 4827. It expires in 5 minutes.”

When a customer replies, a 24-hour service window opens — within it you can answer freely, no template required.

Capabilities

Everything you need around the API.

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Templates

Build, organise and reuse approved message templates with variables and buttons.

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Campaigns

Send to segmented audiences and track delivery, reads and replies.

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Bulk sender

Reach large opted-in lists reliably, with throughput that respects WhatsApp limits.

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Auto-reply

Greet, deflect and route automatically — even outside working hours.

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Catalog & products

Share products and let customers browse and ask, right inside the chat.

⌥

WhatsApp Flows

Collect bookings, forms and structured input without leaving WhatsApp.

Setup

What you need to get started

A short checklist — Mersal handles the technical parts with you.

A registered business and basic detailsA phone number not currently active on the regular WhatsApp appA Meta (Facebook) Business accountA display name that follows WhatsApp’s naming rules
Mersal walks you through Meta Business verification, number registration, the green tick and your first approved templates.
Regulations

The rules that keep delivery healthy

WhatsApp protects users — staying compliant keeps your messages landing.

Opt-in is requiredCustomers must agree to hear from you before you message them.
Approved templatesBusiness-initiated messages use templates reviewed by Meta.
Quality rating & limitsGood quality and low blocks raise your daily messaging limits over time.
Policy complianceFollow the WhatsApp Business and Commerce policies for your industry.
Final Meta policy, eligibility and approval details are confirmed with Mersal before launch.
Pricing

Transparent, pay-as-you-go messaging.

Meta bills WhatsApp usage directly to the payment method connected to your WABA. Estimate Meta usage with the live calculator.

Open the WhatsApp calculator
Marketingper message
Utility & Authenticationper message
Customer replies (24h window)free-form

Put WhatsApp to work for your business.

Start free today, or talk to Mersal about getting your number live on the official API.