diff --git a/search.go b/search.go
index 1ad03f3..37ec562 100644
--- a/search.go
+++ b/search.go
@@ -44,10 +44,12 @@ type SearchResult struct {
 
 // SearchCluster describes a topic cluster when cluster=true.
 type SearchCluster struct {
-	ID            int      `json:"id"`
-	Size          int      `json:"size"`
-	Topics        []string `json:"topics,omitempty"`
-	ResultIndices []int    `json:"result_indices"`
+	ID              int       `json:"id"`
+	Size            int       `json:"size"`
+	Topics          []string  `json:"topics,omitempty"`
+	ResultIndices   []int     `json:"result_indices"`
+	MedoidIndex     *int      `json:"medoid_index,omitempty"`     // index into results of most representative post
+	MedoidEmbedding []float32 `json:"medoid_embedding,omitempty"` // medoid embedding (128d non-bearer, 768d bearer)
 }
 
 // ATURI returns the AT URI for the result.