Smart WhatsApp Messaging for Your Business – Fast, Secure, and Verified
Send OTPs, alerts, files, and more via WhatsApp using our Transactional API. Trusted by businesses for speed and reliability. Get started with our 7-day free demo and send up to 500 WhatsApp transactional messages at no cost.
Why Use Cilwo WhatsApp API?
Cilwo’s WhatsApp API offers verified business messaging with template-based communication, file Support, and real-time alerts like OTPs and reminders.
Verified Business Messaging
Communicate using an official WhatsApp Business account to build trust with customers and enhance brand credibility
Template-Based Communication
Send pre-approved message templates for faster delivery of transactional, promotional, and customer service messages.
File Support (PDFs, Images)
Easily share documents, invoices, images, or brochures directly through WhatsApp to keep communication informative and engaging.
OTP, Alerts, Reminders
Send critical messages like OTPs, payment alerts, and appointment reminders instantly and securely.
Developer Documentation Included
Easily integrate with our API using detailed developer documentation, sample code, and support.
Powerful Features Built for Performance
End- to-End Encryption
Fast & Reliable Delivery
Developer-Friendly API
File, image and OTP support
Real-Time Tracking Dashboard
Easy Template Management
Popular Use Cases for WhatsApp Messaging
Explore how businesses across industries use Cilwo’s WhatsApp API to enhance customer communication and streamline operations
Banking OTP & Alerts
E-commerce Order Updates
Appointment Reminders
Student Communication
Billing & Invoices
Frequently Asked Questions – WhatsApp API Integration
No, promotional content is not allowed.
All WhatsApp message templates must strictly comply with WhatsApp’s Business Policy and Messaging Guidelines.
Templates must be transactional or informational in nature — such as order updates, OTPs, appointment reminders, or support messages.
Using promotional or marketing language (e.g., discounts, offers, product pushes) will not be accepted.
⚠️ Important: If you attempt to send promotional messages through our API while WhatsApp does not support it, WhatsApp may detect and flag your number for spam activity — even if the message is technically delivered. This can lead to your number being suspended or permanently blocked from the whatApp platform.
Most templates are approved within 2 minutes, provided they follow the correct structure and comply with our messaging policies. For best results, use the format and content style shown in our documentation.
Yes, you can send PDFs, images, and other file types using the File API feature. Simply upload the file while composing your approved template and send it directly to your clients.
Placeholders are dynamic values you include inside curly brackets in your template (e.g., {name}, {otp}).
You can use tools like Postman or our built-in “Test API” feature in the dashboard to send test messages and verify your integration.
Yes, you can create and manage multiple templates within your allowed limit. Each template must go through the approval process.
If your template is rejected, our support team will notify you with the reason. You can edit and resubmit the template according to the provided guidelines.
Yes, the number you use for integration must have WhatsApp activated. It doesn’t need to be a verified business account, but it must be active and accessible.
Absolutely. You can track delivery status, recipient numbers, and attached files in the “List Messages” section of your dashboard.
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