I created this API out of a frustration with Twilio. They don't provide such an API and when I requested a list of prices they were only able to provide me with an outdated CSV file. They've since reached out to me with an updated CSV but I had already created this and it works for my purposes.
I've heard for over a month that they will be releasing a pricing API soon... but I did something similar. At least they gave you the CSV, I ended up having to write a scraper while they looked for the CSV file.
Any plans to add support for SMS pricing?
I could do. Hadn't planned to as I only needed the voice pricing but suppose I should add for completeness.