Wyzie Subs is a free & libre subtitles API that uses proxied requests and scraping instead of fetching directly from the API.
Basic Usage
FAQSearch by IMDB / TMDB ID
Search by season and episode
/search?id=tt0121955&season=1&episode=1
Search by language
/search?id=tt3659388&language=en
Search by format
/search?id=tt3659388&format=srt
Search by character encoding
/search?id=tt3659388&encoding=utf-8
Search by source
Search by hearing impaired
/search?id=tt3659388&hi=true