Is it worth writing your own summarization algorithm or are there any APIs which are good enough?

Is it worth writing your own summarization algorithm or are there any APIs which are good enough?

=> quora.com/search?q=marcus-l-endicott+summarization

See all my Quora answers on summarization, such as:

What is the best tool to summarize a text document?
IMHO, there is no best tool to summarize a text document….

However, Orlando Kalossakas has recently recommended Stremor Automated Summary and Abstract Generator API at Mashape, which also lists:

mashape.com/explore?query=summarizer
· Summarizer Tool API
· PithPicker Engine API
· Text Summarization API