WhatsApp Messaging API — Bridge for Your Business

Connect Your
Software to
WhatsApp

Send messages, invoices, OTPs & notifications from your CRM, website, app or any software — straight to your customers' WhatsApp. We are the bridge between your system and your number.

Get Started Free View API Docs
99%
Delivery Rate
<3s
Avg. Speed
24/7
Uptime
5+
Integrations
1.2M+ Sent
This month
< 3 sec
Delivery time
Secure API
Encrypted keys
SR
StyleRooms Interiors
Your Business WhatsApp • via Onyx API
Hi Ahmed! 👋 Your invoice #INV-2094 is ready.
Amount due: AED 3,500 — Due: 30 Mar
9:14 AM
Got it, can you send the PDF?
9:16 AM
Sure! Here's your invoice 📄
Invoice_2094.pdf
9:16 AM
Perfect, I'll pay today. Thanks!
9:18 AM
Your payment OTP: 847291
Valid for 5 minutes. Do not share.
9:19 AM
Powered by ABC CRM via Onyx API
Type a message…
Powering businesses across industries
🛍️ E-Commerce
🏥 Healthcare
📚 Education
🚚 Logistics
💳 Finance
🏡 Real Estate
🍽️ Restaurants
✈️ Travel
🛍️ E-Commerce
🏥 Healthcare
📚 Education
🚚 Logistics
💳 Finance
🏡 Real Estate
🍽️ Restaurants
✈️ Travel
Platform Capabilities

Everything your business needs
to automate on WhatsApp

One platform. Every message type. Delivered fast, reliably, and securely.

Send Any Message Type
Text, images, PDFs, documents, audio, video and GPS location — all from a single API endpoint with no format restrictions.
TextImages PDF / DocsLocation Groups
Delivery Rate
99%
Verified across all message types
Live queue active
Lightning Fast Delivery
Smart queuing with random delay controls to protect your number and ensure reliable delivery.
Connect via QR in Seconds
Scan one QR code from the dashboard — your WhatsApp is connected and ready to use immediately.
Two-Way Messaging
Read incoming messages via API — build chatbots, auto-responders, or customer support flows.
Group Broadcasting
Send text, images and files to WhatsApp groups at once. Perfect for team notifications and announcements.
Secure by Design
Every request is authenticated with your unique Client ID and API token. Credentials never leave your server.
Token Auth HTTPS Only Rate Limiting
Plug into anything

Works with your existing stack

One API. Connect WhatsApp messaging to every tool your business already uses — no ripping and replacing, no vendor lock-in.

CRM Systems

Connect Salesforce, HubSpot, Zoho CRM or your custom CRM to send follow-ups, deal updates and customer support messages directly on WhatsApp.

  • Salesforce
  • HubSpot
  • Zoho CRM
  • Custom CRM

Mobile Apps

Add WhatsApp notifications to your iOS or Android app — OTPs, booking confirmations, order tracking, or two-way chat — in a few API calls.

  • iOS
  • Android
  • React Native
  • Flutter

Websites & E-commerce

Trigger WhatsApp messages on checkout, abandoned cart, shipping updates or contact-form submissions — from WooCommerce, Shopify, or any custom site.

  • WooCommerce
  • Shopify
  • Magento
  • Custom PHP

Internal Software

Embed WhatsApp alerts inside ERP, HRMS, inventory or billing software. Notify teams of approvals, low stock, payroll slips and more without leaving their workflow.

  • ERP
  • HRMS
  • Billing Software
  • Inventory

Invoices & Payments

Automatically send PDF invoices, payment reminders, receipts and OTPs to customers on WhatsApp the moment your accounting system raises them.

  • QuickBooks
  • Xero
  • Tally
  • Custom Billing

WhatsApp Groups

Broadcast internal announcements, team alerts, project updates or HR notices to WhatsApp groups — all triggered automatically from your own software.

  • Team Alerts
  • HR Notices
  • Project Updates
  • Broadcasts
Your Systems
CRM / ERP
E-commerce Store
Mobile App
Website
Billing / Invoicing
Onyx
WhatsApp API
The Bridge
Delivered To
Customer WhatsApp
Internal Team Groups
Vendor / Partner Chats
Broadcast Lists
Support Tickets
By the Numbers

Trusted by businesses worldwide

10,000+
Active Users
50M+
Messages Delivered
99.9%
Uptime SLA
24/7
Cloud Service
Simple Setup

From sign-up to first message
in under 5 minutes

No approvals. No technical barriers. Just 4 quick steps.

01
Create Free Account
Sign up in 30 seconds with your email and WhatsApp number.
02
Start Cloud Service
Launch the cloud service from your dashboard with one click.
03
Scan QR Code
Open WhatsApp on your phone and scan the QR from your dashboard.
04
Make API Calls
Copy your Client ID & API key and start sending from any language.
Start for Free — No Credit Card
Why Onyx API

Your software talks.
Your customers listen on WhatsApp.

You Stay in Full Control

Messages come from your WhatsApp number. Your customers see your brand — we stay invisible as the bridge that makes it work.

Works with Any Software

Any system that can make an HTTP request — CRM, ERP, website, app, billing — can instantly start sending WhatsApp messages.

Groups & Broadcasts

Push alerts, approvals and updates to internal WhatsApp groups or customer broadcast lists — all triggered by your own software automatically.

Scales with Your Business

From 10 messages a day to 10,000 — the API scales seamlessly. Add more numbers as your operation grows, without friction.

One API. Every Use Case.

Send invoices from your billing software, order updates from your e-commerce store, OTPs from your app, HR notices to employee groups — all through WhatsApp using your own number and our simple REST API.

Customer Stories

What our customers say

Real feedback from businesses using Onyx WhatsApp API.

The WhatsApp API has revolutionized our customer communication. We've seen a 40% increase in customer engagement since implementing it.
SJ
Sarah Johnson
CEO, TechStart Inc.
Easy integration and reliable service. Our OTP delivery rate improved to 99.5% and customer satisfaction increased significantly.
MC
Michael Chen
CTO, E-commerce Solutions
Excellent support and documentation. We were up and running within hours. Highly recommended for any business looking to automate WhatsApp messaging.
AA
Abdullah Akram
Marketing Director, Retail Plus
Pricing

Simple, transparent pricing

Start free, upgrade when you need more. Annual billing — no monthly surprises.

TRIAL
$0.00
Free forever
30
Messages included
  • Free Sign up
  • Cloud Service Available
  • 30 WhatsApp Messages
  • Multimedia PDF Images Documents
  • Personal + Business WhatsApp
  • Send to WhatsApp Groups
  • Free PHP & JavaScript Example Code
  • No Support
Get Started Free
STANDARD
$39.99
per year
5,000
Messages included
  • Free Sign up
  • Cloud Service Available
  • 5000 WhatsApp Messages
  • Multimedia PDF Images Documents
  • Personal + Business WhatsApp
  • Send to WhatsApp Groups
  • Free PHP & JavaScript Example Code
  • Email Support
Order Now
Most Popular
PREMIUM
$85.99
per year
13,000
Messages included
  • Free Sign up
  • Cloud Service Available
  • 13000 WhatsApp Messages
  • Multimedia PDF Images Documents
  • Personal + Business WhatsApp
  • Send to WhatsApp Groups
  • Free PHP & JavaScript Example Code
  • Email Support
Order Now
VIP
$169.99
per year
27,000
Messages included
  • Free Sign up
  • Cloud Service Available
  • 27000 WhatsApp Messages
  • Multimedia PDF Images Documents
  • Personal + Business WhatsApp
  • Send to WhatsApp Groups
  • Free PHP & JavaScript Example Code
  • Email Support
Order Now
RECEIVED CHATS ADD-ON
$9.99
per year
0
Messages included
  • View incoming messages
  • Search & filter inbox
  • API access via getReceivedChats
  • Paginated results
Order Now
AUTO-REPLY BOT ADD-ON
$37.00
per year
0
Messages included
  • Keyword auto-replies
  • Webhook hooks (on-send/on-receive)
  • Text + media + document replies
  • Group & private chat support
Order Now
View full pricing & feature comparison
FAQ

Frequently Asked
Questions

Can't find your answer? Chat with us directly on WhatsApp.

Chat with Support
How can I get more than 27,000 messages?
You can order the VIP Package multiple times or contact us directly for a custom enterprise plan.
What is the validity of the packages?
All packages are valid for one year from the date of purchase. Messages must be used before the expiry date — unused credits do not roll over.
What if I consume all messages before the expiry date?
If you run out of messages before your plan expires, you can renew or upgrade your package at any time.
Can I get the API integrated into my Website or App?
Yes, we provide integration assistance. Additional charges may apply depending on complexity. Contact us for a quote.
What payment methods are accepted?
We primarily accept PayPal. Bank transfers are also available. Contact support if you need an alternative payment method.

Ready to send your first
WhatsApp message?

Join businesses already using Onyx WhatsApp API to automate their communications. Free to start — no credit card needed.

Start Free Now Chat with Support