We also offer an SMS Portal currently available on our customer portal My tyntec, where you can upload a file with phone numbers and messages instead of connecting via an API.
Important to know regarding bulk SMS is that many countries have specific regulations on marketing SMS and subscriber opt-in/opt-out requirements, such as GDPR. To make sure that you’re in compliance, please contact your account manager for more information about bulk SMS service or get in touch via support@tyntec.com.