diff --git a/java/google/registry/flows/CheckApiAction.java b/java/google/registry/flows/CheckApiAction.java
index 5e5e540bd..842d27ffa 100644
--- a/java/google/registry/flows/CheckApiAction.java
+++ b/java/google/registry/flows/CheckApiAction.java
@@ -28,7 +28,7 @@ import static google.registry.monitoring.whitebox.CheckApiMetric.Status.INVALID_
 import static google.registry.monitoring.whitebox.CheckApiMetric.Status.INVALID_REGISTRY_PHASE;
 import static google.registry.monitoring.whitebox.CheckApiMetric.Status.SUCCESS;
 import static google.registry.monitoring.whitebox.CheckApiMetric.Status.UNKNOWN_ERROR;
-import static google.registry.monitoring.whitebox.CheckApiMetric.Tier.PREMINUM;
+import static google.registry.monitoring.whitebox.CheckApiMetric.Tier.PREMIUM;
 import static google.registry.monitoring.whitebox.CheckApiMetric.Tier.STANDARD;
 import static google.registry.pricing.PricingEngineProxy.isDomainPremium;
 import static google.registry.util.DomainNameUtils.canonicalizeDomainName;
@@ -139,10 +139,9 @@ public class CheckApiAction implements Runnable {
       responseBuilder.put("status", "success").put("available", availability.equals(AVAILABLE));
 
       boolean isPremium = isDomainPremium(domainString, now);
-      metricBuilder.tier(isPremium ? PREMINUM : STANDARD);
-      if (availability.equals(AVAILABLE)) {
-        responseBuilder.put("tier", isPremium ? "premium" : "standard");
-      } else {
+      metricBuilder.tier(isPremium ? PREMIUM : STANDARD);
+      responseBuilder.put("tier", isPremium ? "premium" : "standard");
+      if (!AVAILABLE.equals(availability)) {
         responseBuilder.put("reason", errorMsg);
       }
       return responseBuilder.build();
diff --git a/java/google/registry/monitoring/whitebox/CheckApiMetric.java b/java/google/registry/monitoring/whitebox/CheckApiMetric.java
index 33b869f9d..d69e6eccf 100644
--- a/java/google/registry/monitoring/whitebox/CheckApiMetric.java
+++ b/java/google/registry/monitoring/whitebox/CheckApiMetric.java
@@ -28,7 +28,7 @@ public abstract class CheckApiMetric {
   /** Price tier of a domain name. */
   public enum Tier {
     STANDARD("standard"),
-    PREMINUM("premium");
+    PREMIUM("premium");
 
     private final String displayLabel;
 
diff --git a/javatests/google/registry/flows/CheckApiActionTest.java b/javatests/google/registry/flows/CheckApiActionTest.java
index 0c19e8dec..e9e98cf40 100644
--- a/javatests/google/registry/flows/CheckApiActionTest.java
+++ b/javatests/google/registry/flows/CheckApiActionTest.java
@@ -20,7 +20,7 @@ import static google.registry.model.registry.Registry.TldState.PREDELEGATION;
 import static google.registry.monitoring.whitebox.CheckApiMetric.Availability.AVAILABLE;
 import static google.registry.monitoring.whitebox.CheckApiMetric.Availability.REGISTERED;
 import static google.registry.monitoring.whitebox.CheckApiMetric.Availability.RESERVED;
-import static google.registry.monitoring.whitebox.CheckApiMetric.Tier.PREMINUM;
+import static google.registry.monitoring.whitebox.CheckApiMetric.Tier.PREMIUM;
 import static google.registry.monitoring.whitebox.CheckApiMetric.Tier.STANDARD;
 import static google.registry.testing.DatastoreHelper.createTld;
 import static google.registry.testing.DatastoreHelper.persistActiveDomain;
@@ -70,7 +70,9 @@ public class CheckApiActionTest {
     persistResource(
         Registry.get("example")
             .asBuilder()
-            .setReservedLists(persistReservedList("example-reserved", "foo,FULLY_BLOCKED"))
+            .setReservedLists(
+                persistReservedList(
+                    "example-reserved", "foo,FULLY_BLOCKED", "gold,RESERVED_FOR_SPECIFIC_USE"))
             .build());
   }
 
@@ -213,14 +215,15 @@ public class CheckApiActionTest {
             "available", true,
             "tier", "premium");
 
-    verifySuccessMetric(PREMINUM, AVAILABLE);
+    verifySuccessMetric(PREMIUM, AVAILABLE);
   }
 
   @Test
-  public void testSuccess_alreadyRegistered() {
+  public void testSuccess_registered_standard() {
     persistActiveDomain("somedomain.example");
     assertThat(getCheckResponse("somedomain.example"))
         .containsExactly(
+            "tier", "standard",
             "status", "success",
             "available", false,
             "reason", "In use");
@@ -229,9 +232,10 @@ public class CheckApiActionTest {
   }
 
   @Test
-  public void testSuccess_reserved() {
+  public void testSuccess_reserved_standard() {
     assertThat(getCheckResponse("foo.example"))
         .containsExactly(
+            "tier", "standard",
             "status", "success",
             "available", false,
             "reason", "Reserved");
@@ -239,6 +243,31 @@ public class CheckApiActionTest {
     verifySuccessMetric(STANDARD, RESERVED);
   }
 
+  @Test
+  public void testSuccess_registered_premium() {
+    persistActiveDomain("rich.example");
+    assertThat(getCheckResponse("rich.example"))
+        .containsExactly(
+            "tier", "premium",
+            "status", "success",
+            "available", false,
+            "reason", "In use");
+
+    verifySuccessMetric(PREMIUM, REGISTERED);
+  }
+
+  @Test
+  public void testSuccess_reserved_premium() {
+    assertThat(getCheckResponse("gold.example"))
+        .containsExactly(
+            "tier", "premium",
+            "status", "success",
+            "available", false,
+            "reason", "Reserved");
+
+    verifySuccessMetric(PREMIUM, RESERVED);
+  }
+
   private void verifySuccessMetric(Tier tier, Availability availability) {
     verify(checkApiMetrics).incrementCheckApiRequest(metricCaptor.capture());
     CheckApiMetric metric = metricCaptor.getValue();