51f3b75a_Campus_Cash_API_Documentation__Description
[Parameter] KeywordMessage [1] Required [Description] 
This is the automated message sent to someone who texts in the keyword. The message body must be in plain text. Supported Character Set Character limits vary per country. The maximum length for a message is 160 characters as default. For instance, SMS messages for Canadian accounts are limited to 140 characters. Although a 160 character message can be sent in full to US mobile numbers, Canadian mobile devices will only receive the first 140 characters. Also, please note that the SMS header and footer are counted as part of the message and should be taken into consideration when composing a message.
Campus Cash API Documentation
Description