MESSAGING API
WhatsApp API for engagement at scale
Engage customers on the world’s most popular messaging app. With the Esendex WhatsApp API, you can send rich, interactive messages that go beyond text to include images, videos, documents, and buttons.
Designed for both developers and no-code teams, our API makes it simple to manage secure two-way conversations that strengthen relationships and drive business results.
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Rich and interactive
Share images, videos, documents, and buttons through WhatsApp, with the Esendex API ensuring fast delivery and reliable performance.
Trusted and secure
As an official Meta business partner, Esendex provides secure and compliant WhatsApp API integration for reliable business messaging.
Effortless integration
With simple documentation, code samples, and 24/7 support, our API makes it easy for both developers and no-code teams to integrate WhatsApp messaging.
> 2bn users
More than two billion people use WhatsApp worldwide, making it the most popular messaging app on the planet.
99.9% uptime
Our API delivers WhatsApp messages with industry-leading uptime so your conversations stay reliable and secure.
< 2 hours
Most teams send their first live message in under two hours with our straightforward set up, integration and expert support.
Built by developers, for developers. Integrate our WhatsApp API for simple, real-time communication
Use our API documentation to integrate Esendex’ services into your systems within minutes. Here’s how to send a WhatsApp message:
// The POST v1/messages endpoint allows you to send a message to a single contact in one request.
// The message can also be sent via different channels; including SMS, Whatsapp and RCS.
curl -X POST 'https://api.esendex.co.uk/v2/messages' -H 'X-Api-Key: {{your-key-here}}' -H 'Content-Type: application/json' -d
{
"accountReference": "EXxxxxxxxx",
"name": "name",
"characterSet": "characterSet",
"channel": "channel",
"from": "from",
"validity": "2025-07-30T09:38:04.4517739+00:00",
"messageType": "messageType",
"body": {
"text": "text",
"templateId": "templateId"
},
"recipients": [
{
"msisdn": "msisdn",
"variables": {},
"metaData": {}
}
],
"addressBook": {
"contacts": [
{
"id": "id"
}
]
},
"metaData": {}
}No commitment, 30 day free trial
Begin your journey by opening a free Esendex account today and get 100 SMS credits.
Ready? Set? Go!
Learn how to get your service up and running with our simple quickstart guides.
Not a coder? We’ve got you covered
Our managed services team will help you get set up at no extra cost. From template approval and compliance to integration and testing, we make sure your WhatsApp Business API is configured correctly so you can start engaging customers with confidence.
“Adding WhatsApp and chatbot functionality to our communications has made a significant impact already as it allows us to triage, automate and resolve customer queries from a single, secure platform that is known and trusted by our customers.”
Lucie Riley – Chief Operating Officer, Rhenus Home Delivery
Let’s start sending, together.
Discover the full power of our mobile messaging platform.
Why choose Esendex?
Having us in your corner ensures that you can support your customers and your business – whatever comes your way.
20+ years of experience
Industry leading support
An expert and reliable partner
One-on-one with everyone
Flexible and scalable options
Solutions designed for you
Get the most out of WhatsApp with our powerful API
Marketing campaigns
Engage customers with personalised offers and promotions supported by images, videos, and product catalogues.
Customer service
Resolve queries quickly through secure two-way conversations with read receipts for added visibility.
Updates and reminders
Send delivery updates, appointment reminders, and real-time notifications straight to WhatsApp.
Rich messages
Enhance conversations with buttons, carousels, multimedia content, and interactive templates.
Branded profiles
Build trust with a verified WhatsApp Business profile that carries your company name, logo, and details.
Automation
Set up workflows to trigger automatic replies, updates, and follow-ups at the right time.
FAQs
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How does the WhatsApp Business API pricing work?
How does the WhatsApp Business API pricing work?Pricing is based on usage. Meta charges per conversation, and costs vary depending on the type of message and customer location. Our team can help you estimate usage and pricing.
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Do I need customer permission to send WhatsApp messages?
Yes. Customers must opt in before you can send them WhatsApp messages, ensuring compliance with Meta’s policies.
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Is the WhatsApp API secure and GDPR compliant?
Yes. All conversations are end-to-end encrypted and fully compliant with GDPR and ISO 27001 standards.
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What kind of support is available during and after integration?
You’ll have access to 24/7 expert support and our managed services team to guide you through setup and onboarding.
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What makes Esendex’s WhatsApp API different?
As an official Meta partner, Esendex offers a compliant solution with fast integration, reliable uptime, and professional support.
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Can I send rich media messages through the WhatsApp API?
Yes. You can send images, videos, documents, templates, and interactive features such as buttons and carousels.
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Can I use the Esendex WhatsApp API without coding skills?
Yes. While developers can integrate directly, we also provide tools and support for no-code teams.
