diff --git a/committer/src/api.rs b/committer/src/api.rs
index 20e3fc15..6eca6ee2 100644
--- a/committer/src/api.rs
+++ b/committer/src/api.rs
@@ -94,12 +94,13 @@ async fn metrics(registry: web::Data<Arc<Registry>>) -> impl Responder {
 #[serde(rename_all = "lowercase")]
 enum HeightVariant {
     Latest,
-    Height(u32),
+    Specific,
 }
 
 #[derive(Deserialize)]
 struct CostQueryParams {
     variant: HeightVariant,
+    value: Option<u32>,
     limit: Option<usize>,
 }
 
@@ -112,7 +113,12 @@ async fn costs(
 
     let response = match query.variant {
         HeightVariant::Latest => data.get_latest_costs(limit).await,
-        HeightVariant::Height(from_height) => data.get_costs(from_height, limit).await,
+        HeightVariant::Specific => {
+            let from_height = query
+                .value
+                .ok_or_else(|| services::Error::Other("height value is required".to_string()))?;
+            data.get_costs(from_height, limit).await
+        }
     };
 
     match response {