diff --git a/.chronus/changes/specs_arm_CheckNameAvailability_operations-2024-10-29-17-11-41.md b/.chronus/changes/specs_arm_CheckNameAvailability_operations-2024-10-29-17-11-41.md
new file mode 100644
index 0000000000..7c96ca18ab
--- /dev/null
+++ b/.chronus/changes/specs_arm_CheckNameAvailability_operations-2024-10-29-17-11-41.md
@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - "@azure-tools/azure-http-specs"
+---
+
+Added CheckNameAvailability operations case for ARM tests.
\ No newline at end of file
diff --git a/packages/azure-http-specs/spec-summary.md b/packages/azure-http-specs/spec-summary.md
index 4e3523f47c..0a1b2441be 100644
--- a/packages/azure-http-specs/spec-summary.md
+++ b/packages/azure-http-specs/spec-summary.md
@@ -916,6 +916,58 @@ Expected response body:
 }
 ```
 
+### Azure_ResourceManager_OperationTemplates_CheckNameAvailability_checkGlobal
+
+- Endpoint: `post https://management.azure.com`
+
+  Resource POST operation.
+  Expected path: /subscriptions/00000000-0000-0000-0000-000000000000/providers/Azure.ResourceManager.OperationTemplates/checkNameAvailability
+  Expected query parameter: api-version=2023-12-01-preview
+  Expected request body:
+
+  ```json
+  {
+    "name": "checkName",
+    "type": "Microsoft.Web/site"
+  }
+  ```
+
+  Expected response body:
+
+  ```json
+  {
+    "nameAvailable": false,
+    "reason": "AlreadyExists",
+    "message": "Hostname 'checkName' already exists. Please select a different name."
+  }
+  ```
+
+### Azure_ResourceManager_OperationTemplates_CheckNameAvailability_checkLocal
+
+- Endpoint: `post https://management.azure.com`
+
+Resource POST operation.
+Expected path: /subscriptions/00000000-0000-0000-0000-000000000000/providers/Azure.ResourceManager.OperationTemplates/locations/westus/checkNameAvailability
+Expected query parameter: api-version=2023-12-01-preview
+Expected request body:
+
+```json
+{
+  "name": "checkName",
+  "type": "Microsoft.Web/site"
+}
+```
+
+Expected response body:
+
+```json
+{
+  "nameAvailable": false,
+  "reason": "AlreadyExists",
+  "message": "Hostname 'checkName' already exists. Please select a different name."
+}
+```
+
 ### Azure_ResourceManager_OperationTemplates_Lro_createOrReplace
 
 - Endpoint: `put https://management.azure.com`
diff --git a/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/checkname-availability.tsp b/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/checkname-availability.tsp
new file mode 100644
index 0000000000..6069bf171b
--- /dev/null
+++ b/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/checkname-availability.tsp
@@ -0,0 +1,62 @@
+import "@typespec/http";
+import "@typespec/rest";
+import "@azure-tools/typespec-azure-core";
+import "@azure-tools/typespec-azure-resource-manager";
+import "@typespec/spector";
+
+using TypeSpec.Http;
+using TypeSpec.Rest;
+using Azure.Core;
+using Azure.ResourceManager;
+using TypeSpec.OpenAPI;
+using Spector;
+
+namespace Azure.ResourceManager.OperationTemplates;
+
+interface CheckNameAvailability {
+  @scenario
+  @scenarioDoc("""
+      Resource POST operation.
+      Expected path: /subscriptions/00000000-0000-0000-0000-000000000000/providers/Azure.ResourceManager.OperationTemplates/checkNameAvailability
+      Expected query parameter: api-version=2023-12-01-preview
+      Expected request body:
+      ```json
+      {
+        "name": "checkName",
+        "type": "Microsoft.Web/site"
+      }
+      ```
+      Expected response body:
+      ```json
+      {
+        "nameAvailable": false,
+        "reason": "AlreadyExists",
+        "message": "Hostname 'checkName' already exists. Please select a different name."
+      }
+      ```
+    """)
+  checkGlobal is checkGlobalNameAvailability;
+
+  @scenario
+  @scenarioDoc("""
+      Resource POST operation.
+      Expected path: /subscriptions/00000000-0000-0000-0000-000000000000/providers/Azure.ResourceManager.OperationTemplates/locations/westus/checkNameAvailability
+      Expected query parameter: api-version=2023-12-01-preview
+      Expected request body:
+      ```json
+      {
+        "name": "checkName",
+        "type": "Microsoft.Web/site",
+      }
+      ```
+      Expected response body:
+      ```json
+      {
+        "nameAvailable": false,
+        "reason": "AlreadyExists",
+        "message": "Hostname 'checkName' already exists. Please select a different name."
+      }
+      ```
+    """)
+  checkLocal is checkLocalNameAvailability;
+}
diff --git a/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/main.tsp b/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/main.tsp
index c5073e69d1..c786aaf4a6 100644
--- a/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/main.tsp
+++ b/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/main.tsp
@@ -4,6 +4,7 @@ import "@typespec/versioning";
 import "@azure-tools/typespec-azure-core";
 import "@azure-tools/typespec-azure-resource-manager";
 import "@azure-tools/typespec-client-generator-core";
+import "./checkname-availability.tsp";
 import "./lro.tsp";
 
 using TypeSpec.Http;
diff --git a/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/mockapi.ts b/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/mockapi.ts
index a442f08578..26fcb4293f 100644
--- a/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/mockapi.ts
+++ b/packages/azure-http-specs/specs/azure/resource-manager/operation-templates/mockapi.ts
@@ -29,10 +29,61 @@ const validOrder = {
     lastModifiedByType: "User",
   },
 };
+const checkNameAvailabilityResponse = {
+  nameAvailable: false,
+  reason: "AlreadyExists",
+  message: "Hostname 'checkName' already exists. Please select a different name.",
+};
 let createOrReplacePollCount = 0;
 let postPollCount = 0;
 let deletePollCount = 0;
 
+// Check Global Name Availability
+Scenarios.Azure_ResourceManager_OperationTemplates_CheckNameAvailability_checkGlobal =
+  passOnSuccess({
+    uri: "/subscriptions/:subscriptionId/providers/Azure.ResourceManager.OperationTemplates/checkNameAvailability",
+    method: "post",
+    request: {
+      params: {
+        subscriptionId: SUBSCRIPTION_ID_EXPECTED,
+        "api-version": "2023-12-01-preview",
+      },
+      body: {
+        name: "checkName",
+        type: "Microsoft.Web/site",
+      },
+    },
+    response: {
+      status: 200,
+      body: json(checkNameAvailabilityResponse),
+    },
+    kind: "MockApiDefinition",
+  });
+
+// Check Local Name Availability
+Scenarios.Azure_ResourceManager_OperationTemplates_CheckNameAvailability_checkLocal = passOnSuccess(
+  {
+    uri: "/subscriptions/:subscriptionId/providers/Azure.ResourceManager.OperationTemplates/locations/:location/checkNameAvailability",
+    method: "post",
+    request: {
+      params: {
+        subscriptionId: SUBSCRIPTION_ID_EXPECTED,
+        location: "westus",
+        "api-version": "2023-12-01-preview",
+      },
+      body: {
+        name: "checkName",
+        type: "Microsoft.Web/site",
+      },
+    },
+    response: {
+      status: 200,
+      body: json(checkNameAvailabilityResponse),
+    },
+    kind: "MockApiDefinition",
+  },
+);
+
 // lro resource
 Scenarios.Azure_ResourceManager_OperationTemplates_Lro_createOrReplace = passOnSuccess([
   {