What is the WhatsApp Business API?

The WhatsApp Business API allows businesses to send and receive WhatsApp messages programmatically, integrate WhatsApp with CRMs and support systems, and automate customer communication at scale using approved templates and conversational flows.

Who should use the WhatsApp Business API instead of the regular WhatsApp Business App?

The API is designed for medium and large businesses that need multiple agents, automation (bots or flows), integration with other systems, or high message volume. Small businesses that reply manually from a single phone usually do not need the API.

Do customers need to install anything special to receive my messages?

No. Customers just need the regular WhatsApp app on their phone or WhatsApp Web. They will see your business as a normal WhatsApp chat with a business account label.

What do I need to get started with the WhatsApp Business API?

You generally need a verified Facebook Business Manager account, a phone number that can receive SMS or voice for initial verification and is not already used for another WhatsApp account, a display name for your WhatsApp business profile that complies with WhatsApp policies, and a solution provider like NUACOM.

Can I use my existing WhatsApp number for the API?

Yes, but you must migrate it. The number cannot be used simultaneously on the WhatsApp consumer app or WhatsApp Business App. When you move it to the API, it will be removed from any existing WhatsApp app.

Can I change my WhatsApp Business API number later?

You can add a new number and set it up as a separate WhatsApp Business account. Moving conversations or history between numbers is not supported; they are treated as different business numbers.

What is the difference between session messages and template messages?

Session messages are messages sent within a customer care window after the customer’s last message. You can send free-form text, media, and interactive messages. Template messages are pre-approved message formats used to start a new conversation or message customers after the customer care window has expired. These must be reviewed and approved by WhatsApp.

Why do I need templates for some messages?

Outside the customer care window, WhatsApp only allows sending approved templates. This protects users from spam and ensures messages are expected and relevant.

How do I create and get message templates approved?

You define the category of the template, the language, and the body text with variables if needed. Then you submit the template for review through NUACOM’s Web Portal.

Are marketing or promotional templates allowed?

Marketing templates are allowed if they comply with WhatsApp commerce and business policies. You must have explicit user consent, and the text must be clear and not deceptive. WhatsApp can reject templates that appear spam-like or misleading.

Do customers need to opt in before I can message them on WhatsApp?

Yes. You must obtain an explicit opt in from the customer, such as on your website, app, SMS, email, or IVR, stating that they agree to receive messages on WhatsApp from your business. Silent or preselected opt-ins are not allowed.

How should I collect consent for WhatsApp messages?

You should clearly mention that you will contact the customer via WhatsApp, show your business name and purpose such as order updates, offers, or support, store the consent details in your systems, and provide an easy way for customers to opt out by sending a clear opt out message.

What happens if a user blocks or reports my number?

If many users block or report your business, your quality rating drops and WhatsApp may limit your messaging tier or restrict your number. You should send only relevant and consent-based messages.

Are there limits on how many messages I can send?

WhatsApp enforces messaging tiers that define how many unique customers you can message in a given period per phone number. Your tier can increase over time if your message quality and volume are consistent and acceptable.

What is the quality rating and why does it matter?

The quality rating is WhatsApp’s measure of user experience with your messages. It is affected by blocks, reports, and engagement. Poor quality can lead to reduced sending limits or restrictions on your number.

Can multiple agents use the same WhatsApp Business API number?

Yes. When you connect the API to a contact center, CRM, or inbox platform, multiple agents can handle conversations from the same number at the same time with routing and assignment rules.

Which types of content can I send?

You can send text messages, images, documents, audio, video, locations, contacts, and in some cases interactive messages such as quick reply buttons or lists, depending on your provider’s support. All content must comply with WhatsApp policies.

Can I send bulk or broadcast messages?

You can start many conversations using approved templates if each user has opted in and the content is relevant. Mass messaging to users without consent violates WhatsApp policies and can put your account at risk.

How will my business appear to customers in WhatsApp?

Customers see your display name, profile photo, description, and a business account badge. In some cases, they may see a verified badge for an official business account if WhatsApp has granted that status.

What is an Official Business Account and how can I get one?

An Official Business Account has a verified badge next to the name and is reserved for selected brands. WhatsApp decides on this status based on brand recognition, reputation, and use case, and approval is not guaranteed even if you use the API.

Can customers start a conversation with us, or can we only message them first?

Customers can initiate a chat by clicking a WhatsApp link or QR code or using an entry point such as a click to WhatsApp ad or button. Once they send you a message, you can reply freely within the customer care window.

Are WhatsApp Business API messages end to end encrypted?

Messages between the customer’s device and WhatsApp servers are end to end encrypted. After messages reach your API client or provider’s servers, they are decrypted so that your systems and agents can read and process them. You should review your provider’s data protection and security practices.

Where is my WhatsApp data stored?

Storage depends on your implementation and provider. WhatsApp stores messages in its infrastructure, and your provider or your own servers store conversation history, logs, and attachments that you use for reporting and integrations.

Why are some of my template messages failing or not delivered?

Template messages can fail if they are not approved, are disabled, are sent with different text than was approved, are sent to users who blocked your number, are sent without valid opt in, or if your quality rating is low and your number is restricted.