Our HTTP/S API connection is a simple, versatile API that connects by submission of a POST or GET to the API server. It can overcome any firewall problems and is popular with mobile developers: |
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For the specific HTTP/S API features:
Clickatell's HTTP API is secure with SSL encryption on both inbound and outbound SMS messages.
It allows 2-way SMS messaging giving more opportunities for interactivity. This SMS API also has
batch sending capabilities. This facility enables high volume delivery and server-side message merging.
It offers the end-user the ability to define all elements common to a batch, and then send only the
parameters that change on a message-by-message basis.
For the convenience of the HTTP/S API:
If messages are delayed for a client specified length of time, Clickatell's SMS Gateway
will reroute text messages to an alternative delivery gateway. With the HTTP API, developers
can set up 3 priority level queues for text message delivery. With this SMS API, Clickatell
also allows delayed delivery, SMS messages can be held for up to 7 days on request before sending.
For the customer control offered by the HTTP API:
Clickatell's HTTP API offers the option of coverage queries as well as queries re text
message status (both push and pull). Customers are able to make balance enquiries and can
set maximum credit charges. If using the delivery delay feature, it is possible to send stop
or delete SMS messages.
All of Clickatell’s A2P text messaging solutions offer the following features:
- Almost immediate SMS functionality for any site or application.
- Clickatell’s mobile messaging API’s support text, Unicode, binary SMS, EMS and Flash.
- Our SMS Gateway API’s support extended length messages.
- Clickatell’s mobile messaging API products come with extensive documentation and script libraries, saving you precious development time.
- VCard and VCal converters are available at no charge for logo and ringtone conversions.
- Our SMS Gateway API’s have delivery acknowledgement features and customized sender ID options.
- Two-way text messaging is enabled for most of our products and we can offer this feature in through 574 Networks in 191 Countries.
- Automatic rerouting to an alternative delivery gateway if a message is delayed for a client specified period of time.
- Customer-specified priority level SMS delivery queues.
- SMS delivery delay of up to 7 days (excluding SMPP API).
- Customers can query network coverage as well as text message status for both inbound and outbound messages (push and pull).
You get 10 free message
credits to send pre-populated text messages to test your connection with the Clickatell SMS Gateway, so take the free trial of our HTTP/S API now.

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