You are here TexSIE API - Developers TexSIE API allows users to collect data about text found on social media and other sources based on sentiment and machine learning algorithms. API methods allow users to get the sentiment of a document, keywords, sentences, entities, tweet or any kind of text blob. The API can recognize people, cities, organizations and more within text, can determine whether text is positive, negative or neutral, and can generate a short summary of text.