Text-to-speech APIs are easy to demo but slightly harder to integrate well. A useful CLI should keep credentials outside source control, validate API errors, preserve audio metadata, and write a file that standard players can open.

This tutorial builds a small Node.js 20+ command-line tool around the public context-aware text to speech API from FlowSpeech. It uses only built-in Node modules.

What we will build

The command will:

read text from the command line;