AlchemyAPI is capable of automatically tagging your HTML, text, or web-based content. We employ sophisticated natural language processing technology to analyze your data, tagging your information in a manner similar to human-based tagging. AlchemyAPI's Concept Tagging API is capable of abstraction, understanding how concepts relate and tagging accordingly ("My favorite brands are BMW, Ferrari, and Porsche." = "Automotive Industry").
API endpoints are provided for performing concept tagging on Internet-accessible URLs and posted HTML files or text content.
Extracted meta-data may be returned in XML, JSON, RDF, and Microformats rel-tag formats. More information on Concept Tagging API response formats is available.