Text Analysis Online no longer provides Text Summarization API Interface, but keep the related demo just for testing:

Simple Text Summarizer: http://textanalysisonline.com/simple-text-summarizer

Rotten Text Summarizer: http://textanalysisonline.com/rotten-text-summarizer

PyTeaser Text Summarizer: http://textanalysisonline.com/pyteaser-text-summarizer

We recommend you use our professional Text Summarization API: Text Summarization, Demo is here: http://textsummarization.net/, and the text summarization api support there kinds of post requests:Text Summarization; Text Summarization for Text; Text Summarization for URL.