Use parameters corpus, source, target, preprocessing and version to search for corpora. Set version to latest to get the latest version. For example:
http://opus.nlpl.eu/opusapi/?corpus=OpenSubtitles&source=en&target=fi&preprocessing=xml&version=latest
List available copora:
http://opus.nlpl.eu/opusapi/?corpora=True
List available languages:
http://opus.nlpl.eu/opusapi/?languages=True
List available languages for a corpus:
http://opus.nlpl.eu/opusapi/?languages=True&corpus=OpenSubtitles
List available target languages for a source language:
http://opus.nlpl.eu/opusapi/?languages=True&source=fi
List available target languages for a source language in a corpus:
http://opus.nlpl.eu/opusapi/?languages=True&corpus=OpenSubtitles&source=fi