The Google Knowledge Graph Search API will let you query the Knowledge Graph database for various information on the entities within the Google’s Knowledge Graph. This is to ultimately replace the Freebase API and the Freebase Suggest Widget. Google said they will release a replacement for the Freebase Suggest Widget and when they do that, they will discontinue the Freebase Suggest Widget a few months later.
This is a read-only API, meaning you cannot submit changes to mistakes within the Google Knowledge Graph within this API. It is only for querying and pulling data from, not sending data back to Google.
Google provided some examples of how you can use the Knowledge Graph Search API include:
Google said they will continue to support the Freebase API “for three full months after the Suggest Widget replacement is released.”
You can check out the new Google Knowledge Graph Search API over at developers.google.com/knowledge-graph.
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