Free, open-source Python and JavaScript client for the TextSight AI detector and AI humanizer API. Detect if text was written by ChatGPT, Claude or Gemini with a sentence-by-sentence AI score, and rewrite AI-sounding text so it reads naturally, in 3 lines of code. A developer-friendly alternative to the GPTZero, Originality.ai and ZeroGPT APIs. Zero dependencies, TypeScript types, automatic retries and a command line tool. Requires a TextSight API key.