This is the part of the API that allow to insert and to retrieve the list of SMS blacklist / Stop SMS.
The SMS blacklist contains the phone numbers to which you don’t want to send any SMS.
If the Stop SMS Service is active, any person who receive an SMS can add their phone number to the blacklist.
Remember to provide the authentication HTTP headers as described in the Authenticate using a session key and the Authenticate using a user token sections.
All the query string parameters in URL must be UTF-8 URL Encoded.