RCS API for rich messaging at scale

Upgrade your communication without sacrificing performance or reach. The Esendex RCS API brings the familiarity of SMS together with the engagement of rich media, giving your business the power to send branded, interactive messages that drive action.

Designed for both developers and no-code teams, it offers simple integration, reliable performance, and 24/7 expert support.

graphic of a woman and a phone, showing an rcs message with a qr code

Trusted by 46,000 customers to deliver world class mobile messaging services

Integrate the future of business messaging

Rich conversations

Use our RCS business messaging API to send videos, carousels, maps, and suggested actions that transform customer communication beyond SMS.

Branded and trusted

Messages are sent from a verified business profile that carries your name, logo, and colours, supported by 99.9% uptime for reliable delivery.

Effortless integration

With simple documentation, multi-language code samples, and 24/7 expert support, our API makes adding RCS messaging straightforward.

“The Esendex range of products greatly enhance the way we speak with our customers from sales follow-ups and engineer appointment confirmations, all the way through to general Q&As.”

Arron Alderson – Solutions and Process Manager, Vaillant

Start your free trial

Discover the full power of our RCS API with 25 free messages over 7 days, no credit card required.

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

Security and compliance

Solutions designed for you

Flexible and scalable options

Get the most out of RCS with our powerful API

Marketing campaigns

Deliver visually rich campaigns with carousels, images, videos, and interactive buttons.

Customer service

Support customers with updates and reminders that include maps, QR codes, and suggested actions.

One-time password (OTP)

Send branded OTPs with your logo and verified sender ID via RCS.

Rich messages

Go beyond SMS with branded media, interactive templates, and suggested replies.

Branded profiles

Reassure customers with verified sender IDs that display your company name, logo, and colours.

Two-way API

Let customers respond through RCS chats with buttons and quick replies, for two way conversations.

FAQs

What’s the difference between RCS and SMS?

SMS is a universal, text-only channel delivered over the mobile network and supported by every handset. RCS (Rich Communication Services) uses mobile data or Wi-Fi to deliver messages, enabling richer content such as images, videos, buttons, and branded business profiles. Read our guide to learn more. 

Can all devices receive RCS messages?

RCS messaging is available on Android devices running version 5.0 or higher, and on iPhones using iOS 18.2 or later. If a device doesn’t support RCS, our API automatically falls back to SMS.

Is the RCS API secure and GDPR compliant?

Yes. The Esendex API is fully compliant with GDPR and ISO 27001.

How quickly can I start sending messages with the RCS API?

Most teams send their first RCS message in under two hours thanks to simple integration and expert support.

Do I need coding skills to use the RCS API?

No. Our managed services team make it easy to get started without technical resources.

Start your free trial

Discover the full power of our RCS API with 25 free messages over 7 days, no credit card required.