SMSOTPS is a web-based service for receiving SMS verification codes through temporary virtual phone numbers. Users choose a service and a supported country, review the displayed price for that combination, and obtain a number to enter during sign-up. Incoming codes appear beside the number in the user’s dashboard. The service states that charges for standard one-time orders are returned to the account balance if no SMS arrives, and that numbers close when the verification session ends. The service is intended for one-time verification and other low-stakes sign-ups where users do not want to provide a personal phone number. Available services and countries depend on the numbers listed at the time of selection, and acceptance of a number is determined by the third-party service being accessed. SMSOTPS advises against using a one-time number for accounts that may require later codes for login, recovery, or device changes, since the number may no longer be available. SMSOTPS also provides a REST API for developers and testers to request numbers, retrieve codes, and close sessions, including support for concurrent verification tasks. API keys are generated through a user profile, and the service provides API documentation and integration scripts. The website describes a workflow in which users fund an account balance, select a service and country, request a number, and retrieve the code from the dashboard or through the API.