Litmus is an Elixir library built at Lob for validating user input. We use it to validate API parameters are in the correct form. If you’ve ever used something

Litmus is an Elixir library built at Lob for validating user input. We use it to validate API parameters are in the correct form. If you’ve ever used something like Joi in Javascript, Litmus is similar, albeit not as feature-rich yet.