What's going on with the Google Knowledge Graph API?

I have used the knowledge graph API before and it worked fine. I tried to access it today and it gives me no results at all. Here is my sample request and response.

GET Request:

https://kgsearch.googleapis.com/v1/entities:search?query=taylor+swift&key=MY_API_KEY&limit=1&indent=True

Response:

{
"@context": {
"@vocab": "http://schema.org/",
"goog": "http://schema.googleapis.com/",
"EntitySearchResult": "goog:EntitySearchResult",
"detailedDescription": "goog:detailedDescription",
"kg": "http://g.co/kg"
},
"@type": "ItemList",
"itemListElement": []
}

Solution

It is working now : http://knowledge-graph.fr/ I confirm there was an issue with the API.

You can also try it here in Google Developer Console : https://developers.google.com/apis-explorer/?hl=fr#p/kgsearch/v1/kgsearch.entities.search?query=taylor+swift&_h=1&