The Google Knowledge Graph Search API is the official interface for programmatically accessing and leveraging data stored within Google’s Knowledge Graph. This API is central to entity-based semantic research, providing structured information about real-world entities.
Key use cases for this API include performing entity exploration (retrieving data like name, description, detailed URL, and Knowledge Graph entity ID for specific queries). It is also utilized for extracting closely related entities to expand keyword lists, and for grouping keywords into clusters based on shared related entities identified within the Knowledge Graph. The API enables the creation of network graph visualizations, helping researchers map conceptual relationships between entities.
Leveraging the Knowledge Graph Search API helps SEOs ensure their brand and key products are recognized as distinct entities and enhances their overall visibility in SERPs, Knowledge Panels, and voice search results.