WhatsApp API for Developers
WhatsApp, as a channel your software owns.
Integrate the Official WhatsApp Business API with enterprise-grade infrastructure, developer-friendly APIs, and reliable webhooks for scalable messaging.
- REST APIs & Real-Time Webhooks
- Guided Onboarding & Implementation
- Postpaid Billing - Pay Only for Usage
- Fast & Reliable Message Delivery
Why Teams Trust Us With A Business-Critical Channel
Official Infrastructure
Get direct access to the Official WhatsApp Business API.
Pricing You Can Predict
Simple Usage-Based Billing Postpaid billing with no upfront costs. Pay only for what you use with transparent per-message pricing.
Support When Your Developers Need It
Documentation, onboarding guidance, and a technical team available through integration and after go-live - not a support ticket black hole.
Two-way by Default
Most providers stop at sending. We give you webhooks as well, so your software knows the moment a message is delivered, read, or replied to - no polling.
Send with our APIs
Trigger any WhatsApp message from an event in your software - an OTP, an order update, a reminder, or an invoice. Connect via a single clean API call with no fixed template lock-in for custom workflows.
- Trigger messages from any custom app event
- Deliver login OTPs and verification alerts instantly
- Dynamic template variables for personalized content
- High-throughput delivery routes built for scale
Receive with our webhooks
Every delivery status (sent, delivered, read, failed) is pushed to your system in real time. Customer replies land in your webhook the moment they are sent, so your software can react instantly to close the loop. (Requires Developer Plan).
- Real-time status updates (delivered, read, failed)
- Instant callback notifications on user replies
- Trigger automated workflows or close support tickets
- Zero polling required - direct events push to your endpoint
Built For Every Transactional Message Your Software Sends
Not a marketing blast tool. Enterprise infrastructure for the messages your business depends on - sent and received with complete status updates.
Authentication
Secure login OTPs, registration verification, and two-factor authentication (2FA) messages delivered in real time.
- Login OTPs & registration check codes
- Secure two-factor validation
- High-priority delivery queues
Transactions
Keep customers updated at each milestone with automated order confirmations, shipping updates, and delivery alerts.
- Order confirmations & transaction summaries
- Real-time shipping and delivery milestones
- PDF invoices and payment receipt delivery
Payments
Generate and send payment links directly on WhatsApp. Customers pay without leaving the conversation, and you get a webhook instantly (requires Developer Plan).
- Generate native checkout links
- Instant payment confirmation callbacks
- Reduce purchase abandonment
Retention
Appointment reminders, booking confirmations, subscription renewal alerts, and customer re-engagement notifications.
- Automated booking confirmations
- Subscription renewal and invoice alerts
- Minimize appointment no-show rates
Support & Custom Workflows
Trigger WhatsApp alerts from any system event, and route customer replies back to your internal helpdesk or custom workflow engine (requires Developer Plan).
- Ticket updates & custom resolution flows
- Route customer replies directly back via webhook
- Adaptive template configurations
What you can build on it
If your platform can make an API call and expose a secure HTTPS endpoint for webhook delivery, it can run a full WhatsApp conversation loop.
From contact to production
Talk to us
Tell us what you're building, and what you need to send and receive.
Meta verification
We guide your team step-by-step through onboarding and official Meta Business Manager account setup.
Get credentials
Receive your production API and webhook keys alongside technical developer docs.
Integrate & build
Your developers integrate using our clean endpoints. Our technical team is available to assist.
Go live
Start sending alerts and receiving customer replies directly from your custom application codebase.
Pricing, in two lines
We pass Meta charges through exactly at cost. No hidden margins. No markup.
Outbound API (Pay-As-You-Go)
- Send OTPs, alerts, registration check codes & templates
- Actual Meta Passthrough Cost: ₹0.1150 / message (Utility/Auth)
- No recurring monthly platform subscription cost
- Does not include delivery webhooks or reply event webhooks
Developer Plan
- Full Real-Time Webhook Integration (delivery status & user replies)
- API Dashboard & Webhook Troubleshooting Logs
- Includes 2,000 API calls per month, then ₹0.03 / message
- Dedicated Technical Onboarding & Integration Support
Get Production API Credentials
Submit your application details below to get access keys and launch WhatsApp integration.
Frequently Asked
Questions
Everything you need to know about integrating our official WhatsApp developer API and webhook infrastructure.
Is this the official WhatsApp Business API?
Will Aeternitychat integrate this into our software?
Do you mark up Meta's messaging charges?
Do we only get an API to send messages, or can we receive replies too?
Can we send OTPs and authentication messages?
Can we accept payments through WhatsApp?
Which platforms can integrate?
How fast can we get started?
Ready to send - and receive - from your own software?
Official infrastructure. Transparent pricing. REST APIs & real-time webhooks. Technical support that shows up.
