SMS API
for Developers
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About... -
Key features
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Case studies
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Prices
In house technical expertise
We’re a technology company ourselves, with a dedicated in-house development team, so you can be assured that our SMS API is easy to use, yet offers sophisticated functionality. It’s constantly evolving with help from our developer community.
Easy to implement
Our SMS API is practical, straightforward and supported with detailed documentation including example code to get you started quickly.
A wealth of resources
On our website you’ll find sample code, documentation, a support section. But if you’d rather speak to someone instead, just drop us an email support@esendex.com.
Fast set up
It’s quick and easy to integrate with our SMS gateway, no matter which programming language you use.
Built on the ReSTful API (Representational State Transfer)
| Esendex API features | ||
| Send SMS | ||
| Send an SMS to cell phones directly from websites, applications or software |
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| Send SMS messages to multiple numbers and groups |
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| Schedule messages to be sent in the future, specifying the date, hour and minute |
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| Send long messages of up to 612 characters* (approx. 4 SMS) The recipient receives them as a single message |
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| Set an expiry date so that if an SMS can’t be delivered in time it’s cancelled* |
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| Send Voice SMS | ||
| Convert text messages to voice calls |
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| Send a Voice SMS to cell phones or landlines |
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| Simple IVR options allows the recipient to acknowledge the message |
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| Multiple retries until the voice message is listened to (10 mins apart) |
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| Realtime delivery and acknowledgement status updates |
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| Send voice messages in a variety of languages |
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| Receive SMS | ||
| Receive SMS to your websites, applications or software |
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| Retrieve your inbox messages for use with websites, applications or software |
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| Choose to receive SMS via a US shortcode or an international cellphone number |
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| Send an auto response to anyone that texts you |
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| Mark inbox messages as read or delete |
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| Contact management | ||
| Create, edit and delete groups and contacts |
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| *** Coming soon *** import contacts from your cell phone | ||
| *** Coming soon *** access contacts live from Salesforce and Plaxo | ||
| Reporting | ||
| Real-time notification of inbound messages |
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| Real-time notification of delivery of messages |
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| Free delivery receipts to confirm the time and date the SMS was received* |
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| Account management | ||
| Setup and manage your application endpoints to receive real-time notifications |
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| Automated emails warn you when credit limits are low at a threshold you decide |
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| Free unlimited email support |
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| Online support and user forums |
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| *Network restrictions apply | ||
Leading internet retailer Ocado sends home delivery reminders to their customers and manages staff cover, overtime and holidays all via SMS. Read
Chose Esendex to be their partner in offering business critical SMS alerting as part of their website performance monitoring tool. Read
Multiple departments now rely on the Esendex SMS service to communicate internally and with customers. SMS has improved debt collection rates and customer satisfaction markedly. Read
Sends appointment reminders via SMS and has since saved thousands of wasted call outs – allowing them to do legitimate repairs more efficiently and quickly. Everyone wins!. Read
Integrated the Esendex SMS API with their own automated job allocation system to alert field workers to their next job. This two-way service allows field staff to respond at different stages so progress can be monitored. Read
Trust the Esendex SMS service to deliver internal crisis communications within seconds. Read
Successful retailer Kiddicare relies on Esendex to communicate delivery slots with their customers. The service has reduced their costs, optimised delivery rates and improved customer satisfaction too. Read
Use SMS to place relief staff in temporary employment, at very short notice. This allows them to keep the headcount down whilst managing over 600 temporary staff. Read
Pay As You Go SMS pricing: clear, simple and flexible
Our pricing is straightforward and transparent. The more you spend the more credit we give you – so $20 buys you $20 of credit but $500 of credit only costs you $420. Every message sent reduces your credit by 5c (10c for any international messages) - it's as simple as that. Messages are valid for 12 months from the date of purchase.
| SMS credit value | You pay | No. SMS* | Effective price |
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| $25.00 | $25.00 | 500 | 5.00c |
| $50.00 | $47.50 | 1,000 | 4.75c |
| $100.00 | $90.00 | 2,000 | 4.50c |
| $250.00 | $215.00 | 5,000 | 4.30c |
| $500.00 | $420.00 | 10,000 | 4.20c |
| $1,000.00 | $820.00 | 20,000 | 4.10c |
| $2,500.00 | $2,000.00 | 50,000 | 4.00c |
You can buy messages online at any time - or you can call us during office hours. When you're running low we'll email you an automated credit reminder, so you never run out of messages. If you need more messages than we've listed here, get in touch with us at sales@esendex.us. We can put together extremely competitive pricing to meet your exact requirements.
Post-paid SMS: our lowest prices for volume users
If you’re going to be sending more than 10,000 SMS per month then post-paid SMS may be better for you. Whether it’s a flat-rate price for our lowest prices with a small minimum commitment or a “tracker tariff” that changes as your volume changes, we’re happy to put a create a tariff that suits your needs.
The small print...
- Some networks may charge users to receive the messages which you send them
- Pre-paid SMS messages are valid for 12 months from purchase
- Post-payment terms are subject to status and may require an initial deposit
- All prices are exempt from sales tax for US resident businesses.
- * No. SMS is based on US SMS. International SMS are charged at twice the prevailing rate.