Four different utilities to send SMS text message from the macos command line:
sms: Send text messages via macos Messages application (AppleScript).sms.sh: Send text messages via https://textbelt.com service (Bash).smscli: Send text messages via https://textbelt.com service (Go).smsclic: Send text messages via https://textbelt.com service (C).
These utilities were more of a quick exercise on how to write HTTP calls using different languages.
You can install any of these 4 utilities using my Homebrew Tap. For example:
brew install lencap/tools/sms
Once the tap is registered, the other utilities can easily be installed with just brew install smsclic, etc.
Each Makefile within the respective language directory also allows an option to install to /usr/local/bin/, if you rather do that:
make install
CORRECTION: Didn't bother creating a brew formula for the Bash one.
For the ones needing compilation, read the respective Makefile for more info.
Run each utility without any arguments to see the usage, which provides details for what to configure. The simpler sms one just requires that you're logged on to your Messages app. The other 3 need a KEY (from the https://textbelt.com service) to be in a text file as:
svckey = KEY
Checkout the code for the name of the respective file.
Run with the 2 obvious arguments (cellphone number & the actual message):
sms 2015554444 "Hello world"
These have only been tested on macos 10.15.2