Ask HN: Alternative to Skype SMS Service (Linux CLI – Webservice API)?

I really liked some things in the approach Skype had with SMS (started writing them, but got over the character limit). However, I've grown tired of Microsoft's constant changes to UI and TOS of Skype (I guess, due to efforts to turn it into a social network); and I'd like to part ways with Skype. So, is there a service that would function as an alternative - primarily through a Linux desktop CLI client? In fact, if there was a web service, with endpoints like `getAccountBalance`, `getPriceForCurrentText`, `sendTextAsSMS` and `getStatusForSentSMS`, I guess I could build myself a Linux CLI (say, `bash`) client, that would also deal with plain text contact lists with mobile numbers, and save plain text "conversation" (not really conversation, since it'd only save messages I've sent) archive logs - that is all that I'd need, really. And if I can build a `bash` CLI client, I could also build a PHP client that could run on a cheap shared LAMP webserver as well. But I wouldn't mind a pre-made CLI client - as long as it's open source, so I can change it if I don't like it. I'd expect to be paying for a service like this, and I understand I cannot be anonymous in this context - so I'd be OK with registering an account with my real email, and 2-factor SMS authentication (which is, in most other cases, a no-no for me). So, is there such a service, that will let you sign up, and send SMS internationally/globally: * With your own mobile number (possibly 2FA authenticated) as SMS sender? * Supports splitting of long SMS into shorter ones, and accurately bills for that? * With reasonable prepaid payment options (something like min 5-15 Euro per round of credit, instead of "get 10000 SMS for just 100 Euro") - where the balance is accurately deduced from, each time SMS is sent? * With relatively stable API endpoints?