messageContact

Host: https://YOUR_SUBDOMAIN.rest.marketingcloudapis.com
POST /sms/v1/messageContact/MzA6Nzg6MA/send
Content-Type: application/json
Authorization: Bearer YOUR_ACCESS_TOKEN

{
    "mobileNumbers": [
    "13175551212"
    ],
    "Subscribe": true,
    "Resubscribe": true,
    "keyword": "JOINSMS"
}