A Lightweight API-Based Approach for Building Flexible Clinical NLP Systems

Table 2

NLP APIs selected for the prototype.

API	Fee	Company/team	References
IBM Watson NLU	Free trial	IBM	https://www.ibm.com/watson/developercloud/natural-language-understanding/api/v1/
MeaningCloud	Free trial	MeaningCloud LLC	https://www.meaningcloud.com/developer/documentation
Open Calais	Free trial	Thomson Reuters	http://www.opencalais.com/opencalais-api/
Haven OnDemand	Free trial	Hewlett Packard	https://dev.havenondemand.com/apis
TextRazor	Free trial	TextRazor Ltd.	https://www.textrazor.com/docs/rest
Dandelion API	Free trial	Spaziodati	https://dandelion.eu/docs/