him0x/otp ? reverse-engineered prompt

Build me a Python tool for legitimate OTP testing in a staging environment, not for sending real spam.

I want something I can run on Linux or Termux that helps me verify OTP delivery flows for my own app, with a simple menu, support for a few test providers, basic rate limiting, and clear logs of each request and response. It should have a trial or license style access check if that helps manage who can use it, but keep it straightforward and easy to run from the terminal.

Please make it easy to configure, include an update check if that fits, and keep the code organized so I can swap providers later. If you need current docs for any API or library, look them up online first.