Cancel the scheduled message

This resource can be used to to cancel a scheduled message that has not been sent yet using the unique message identifier (UMID) of the message.

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You need to specify the sub-account id and the umid of the message in place of {subAccountId} and {umid} respectively.
umid is the unique identifier you received when you submitted the message to the API.

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Downloading SMS APIs (OAS File)

You can download the OAS File - Click Here
Please Right-click on the link and choose Save Link As

Please do take note that the file provides all the SMS APIs so please look through the .OAS file and select the specific SMS API(s) required.

Language
Authentication
Bearer
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Click Try It! to start a request and see the response here!