Intelligent SMS API from the messaging experts

Integrate with our SMS API to programmatically send text messages to your customers and within your business. 

Woman smiling at her phone, showing pleasure at the intuitiveness of the messaging API
Trusted by industry leaders to deliver world class mobile messaging solutions

One-way and two-way conversations

Like any API (application programming interface), an SMS API links two applications – in this case your software and an SMS gateway – using a HTTP request. This means that messages can easily be managed, automated, scheduled and optimized in the volumes required and converted to the correct format for the telecoms network.  

What is an SMS API?

Our SMS API allows organizations to send out timely one-way messages – including special offers and deals, and appointment or reservation reminders. You can also set up two-way conversations helping to resolve enquiries and boost engagement far quicker and more cost effectively compared to phone calls. 

How does it work with SMS gateway?

An SMS gateway is the infrastructure that enables the sending and receiving of messages between networks and applications. Once instructions have been received via the API, the gateway converts messages from the program code used to a format that is compatible with the mobile network, and then pushes them out to users.

How do you integrate an SMS API?

Esendex’s APIs are developed for ease of use, and can be integrated within minutes. We’ve put together a series of quickstart guides to show you how.

What programming languages can I use?

Esendex SMS API supports multiple languages, including cURL, C#, PHP, Java, Ruby, Node and Go. Find out more in our developers’ section.

Why choose our SMS API?

Fast, reliable message delivery

Our direct connections to all major networks ensures secure message delivery to both local and international customers, via the fastest and highest quality routes available.

Multichannel, global, scalable messaging

Send messages automatically to any country in seconds from a provider that sends billions of messages across the globe every year.

Robust, dependable connectivity

Be confident that your time-critical messages will always be sent. Our APIs and messaging platform consistently achieve an uptime of 99.99% availability.

Easy, quick integration

Be ready to send and receive messages in minutes. Our developers’ documentation will help guide you through how to implement our sms messaging APIs seamlessly into your website or application.

Local support with a global reach

Access all the benefits of a global provider with the personal touch of expert local support. With access to a dedicated account manager, you can get support whenever you need it.

End-to-end data and security protection

Our ISO 27001 accreditation and usage of the most secure communication protocols shows our commitment to protecting our customers’ data. We do not use grey routes. Our APIs are served using HTTPs to ensure data privacy.

Key features of our SMS API

Send personalized and customized messages to single or multiple contacts.

Retrieve inbound messages.

Create and save SMS templates with dynamic fields that can be personalized  to each recipient.

Be confident your messages have arrived by easily seeing the status of your messages and their send/delivery success.

In addition to tracking message delivery status and engagement metrics, you can add metadata to sent messages (e.g. campaign code or details specific to each recipient).

This means you can segment data, making it easier to report on responses from different types of customers.

Quickly and easily retrieve the number of message credits you have remaining for each of your accounts and channels. 

With our API, you can view balance information all in one place.

Developer? Come and play with our API.

We help build experiences, not just software

Our messaging API makes it easy for you to forge stronger connections with your customers, using a single platform. One API is all you need. Here’s how we’ve helped other businesses…

Capgemini deploys a robust click-and-collection solution, thanks to Esendex’s SMS API

Approached by a major high street retailer to launch their new click-and-collect service, Capgemini chose our SMS API to help. Since implementing this automation, their end customer’s ecommerce division has increased.

Let’s start sending, together.