A method may include obtaining first API documentation associated with a first API and second API documentation associated with a second API. The method may include mining the first API documentation to extract a first plurality of semantic triples and mining the second API documentation to extract a second plurality of semantic triples. The method may include selecting a first subset of semantic triples from the first plurality of semantic triples and a second subset of semantic triples from the second plurality of semantic triples. The method may include generating a first ontology based on the first API documentation and the first subset of semantic triples. The method may include generating a second ontology. The method may include correlating the first ontology with the second ontology. The method may include generating a knowledge graph of the first API and the second API.