[DOCS] Add link to Graph Explore API
Original commit: elastic/x-pack-elasticsearch@eaf68a6e86654a826aa289512fbe13f901463f1e
+[role="xpack"]
[[graph-api]]
== Graph APIs
-//TO-DO: Update link:
-See {xpack-ref}/xpack-api.html[X-Pack APIs].
+The Graph "explore" API is accessible via the
+`/_xpack/graph/_explore` endpoint.
+See {kibana}/graph-api-explore.html[Explore API].
//* <<graph-api-explore>>
