REST interface reference

Request
A description of the request for every single API HTTP status codes
An explanation of the codes the API can return Output
A description of the responses that can be obtained from API resources Positions
How to interpret text blocks' positioning data Phrase types
Phrase types detected by text subdivision Dependency representation
How to represent syntactic analysis output Standard topics
Topics detected by keyphrase extraction Entity types
The types recognized by entity recognition Expert.ai types
Custom part-of-speech tags