.png)
.svg){kind=icon}
April 25, 2025
•
9
min read
How to Send Messages Through WhatsApp API: Complete Guide
George Miloradovich
Researcher, Copywriter & Usecase Interviewer
WhatsApp messages have a 98% open rate, making them one of the most effective ways to engage customers. But how do you scale this communication for your business? The WhatsApp Business API is the answer. It enables companies to send automated messages, notifications, and even run chatbots - all while maintaining a personal touch.
This guide covers everything you need to know to get started, including:
Whether you're looking to streamline customer support, automate order updates, or send real-time notifications, tools like Latenode make it easy to build workflows that connect every step.
Let’s break it down.
To integrate the WhatsApp Business API in the United States, ensure your business meets specific requirements and follows the outlined steps.
Before diving into the integration, confirm that your business complies with these essentials:
To set up your WhatsApp Business account, follow these steps:
Latenode simplifies the integration process with its visual workflow tools, making it easier to configure and test your WhatsApp Business API.
Latenode also includes features for secure data handling and reliable webhook management, aligning with US compliance standards. Completing the verification process allows your business to earn an Official Business Account status, marked by the blue checkmark.
Continue to the "API Setup and Security" section for more details on configuration and testing.
Setting up and securing your API is crucial for protecting data and ensuring smooth communication. Below, you'll find key steps for security, configuration, and testing to safeguard message transmission.
{
"Authorization": "Bearer YOUR_ACCESS_TOKEN",
"Content-Type": "application/json"
}
Set up webhook endpoints using HTTPS to securely manage incoming messages and status updates. Additionally, adhere to WhatsApp's rate limit guidelines to maintain consistent and reliable message delivery.
Before deploying your API, thorough testing is essential to identify and resolve issues.
curl -X POST https://your-endpoint.com/webhook \
-H "Authorization: Bearer YOUR_TOKEN" \
-d '{"challenge": "challenge_code"}'
Once your API is properly set up and secured, you can start sending messages through the WhatsApp API. This guide explains the required formats, message types, and how to track delivery to ensure your messages reach their destination.
Every message you send must be formatted in valid JSON. For example, here's how a basic text message request should look:
{
"from_number": "+1-555-0123456",
"to_number": "+1-555-7890123",
"text": "Your appointment is confirmed for April 30, 2025 at 2:30 PM EST"
}
Key requirements for formatting:
The next section will help you choose the appropriate message type for your use case.
The WhatsApp API supports multiple message types, allowing for flexibility in communication. Here are the primary types with examples:
{
"message_type": "text",
"to_number": "+1-555-0123456",
"text": "Order #12345 shipped. Tracking: USPS9876543210"
}
{
"message_type": "media",
"to_number": "+1-555-0123456",
"media": "https://your-domain.com/invoices/INV-2025-04-26.pdf",
"caption": "Your April 2025 Invoice"
}
{
"message_type": "location",
"to_number": "+1-555-0123456",
"latitude": 40.7128,
"longitude": -74.0060,
"name": "Empire State Building",
"address": "350 Fifth Avenue, New York, NY 10118"
}
Select the message type that best aligns with your communication needs.
Once a message is sent, it's important to monitor its delivery status. Follow these steps to track and log progress:
Here’s an example of a webhook response for tracking:
{
"message_id": "wamid.ABC123xyz",
"status": "delivered",
"timestamp": "2025-04-26T14:30:00-04:00",
"to_number": "+1-555-0123456"
}
Incorporate error handling and maintain logs in your webhook system. This ensures you can quickly identify and resolve delivery issues, even during brief network outages.
Using your secure and verified WhatsApp API, you can streamline essential business communications by setting up automated workflows with Latenode.
To get started, follow these key steps:
{
"template_name": "order_confirmation",
"parameters": {
"order_number": "{{order.id}}",
"delivery_date": "{{order.estimated_delivery}}"
}
}
Automated workflows can transform everyday processes into efficient, hands-off operations. Here are a few practical examples:
Customer Support Automation
When a support ticket is resolved in Zendesk, Latenode sends a WhatsApp message asking for customer feedback. This streamlined feedback loop helps businesses track and improve their support services with measurable data [1].
E-commerce Order Updates
Shopify store owners rely on Latenode to keep customers informed about their orders. For example, when an order's status changes, an automated WhatsApp message updates the customer - whether it's about shipping, delivery, or delays [1].
Employee Onboarding
HR teams use Latenode to simplify onboarding. By connecting BambooHR to WhatsApp, they automate welcome messages and send orientation details as soon as a new employee's record is added to the system [1].
This section highlights common challenges and practical solutions for WhatsApp messaging.
Authentication Issues
If you encounter authentication errors (Error Code 0), generate a new access token through your dashboard. For expired tokens (Error Code 190), create a new system user token to resolve the issue [2].
Rate Limiting Problems
When faced with Error Code 4 (API Too Many Calls), spread your messages over a longer timeframe, monitor throughput (default is 80 messages per second), and consider requesting a higher rate limit if necessary [2].
Template-Related Errors
To avoid template-related issues, ensure the following:
For businesses operating in the US, adhering to regulatory standards is equally important to avoid compliance issues.
Key Compliance Practices
Data Protection Measures
While WhatsApp's end-to-end encryption provides strong security, businesses should also:
| Message Type | Best Use Case | Delivery Success Tips | Common Pitfalls |
|---|---|---|---|
| Template Messages | Business updates, notifications | Use clear language and limit variables | Rejection due to promotional content |
| Session Messages | Customer support, order updates | Respond within 24 hours of the user's message | Missing the 24-hour window, requiring a template |
| Interactive Messages | Appointments, surveys | Add clear calls-to-action and limit options | Overly complex button structures or unclear instructions |
By applying these practices and leveraging automation tools like Latenode, you can effectively handle errors, ensure compliance, and optimize message delivery.
Incorporate these strategies into your Latenode workflows to keep your WhatsApp messaging smooth and compliant.
Latenode's WhatsApp API messaging allows businesses in the US to streamline and automate their communication processes. This guide covered everything from setting up the API to implementing advanced automation strategies.
Key highlights included:
By using Latenode's workflow builder, businesses can design automated processes that integrate smoothly with their existing systems, ensuring reliable communication and operational stability.
Important steps to follow:
The WhatsApp Business API provides powerful tools for businesses to enhance customer communication. It allows you to send personalized messages, notifications, and updates to a large number of users who have opted in. This makes it ideal for promotions and transactional messaging.
With its automation capabilities, you can integrate chatbots to handle routine inquiries, freeing up your team for more complex tasks. Additionally, features like clickable buttons and rich media (images, videos, and documents) make interactions more engaging and user-friendly. The API also supports live chat across multiple devices, ensuring seamless support for your customers.
Latenode simplifies the integration and automation of WhatsApp messaging by allowing businesses to create custom workflows without needing to write code. Its platform connects multiple applications seamlessly, enabling businesses to streamline communication and automate repetitive tasks efficiently.
With Latenode, you can design workflows tailored to your specific needs, such as sending personalized messages, managing customer interactions, or automating notifications. This helps improve engagement, save time, and enhance operational efficiency for your business.
To comply with US data privacy laws while using the WhatsApp Business API, ensure you understand how WhatsApp collects, uses, and shares personal information. Familiarize yourself with their privacy policies and ensure they align with US regulations, such as the California Consumer Privacy Act (CCPA).
Additionally, review the privacy policies of any third-party tools or services you integrate with the API to confirm they handle data responsibly. Always obtain proper consent from users before collecting or processing their personal information, and provide clear options for them to manage their privacy preferences.
