We have launched the Professional Text Sentiment Analysis API on Mashape, which include stock text sentiment and twitter text sentiment. The model is independently trained by stock related text and twitter related text and provides the sentiment result with confidence. You can try them on the Text Sentiment website: http://textsentiment.com/.
Text Sentiment API is based on advanced Natural Language Processing and Machine Learning technologies, and it belongs to sentiment analysis and can be used to analysis text that user provided. Until now, we provide two type of text sentiment analyzer, include stock sentiment analyzer and tweet sentiment analyzer. You can test them here by the demo or you can subscribe the free plan of our Text Sentiment API on Mashape to test them first. Based by the Mashape Platform, the Text Sentiment API can by easily used in any enviroment capable of makeing HTTP requests, including Java/JVM/Android, Node.js, PHP, Python, Objective-C/iOS, Ruby, .NET.