diff --git a/billing/v1/billing.proto b/billing/v1/billing.proto
index ff6e5993..9f8cee92 100644
--- a/billing/v1/billing.proto
+++ b/billing/v1/billing.proto
@@ -1074,6 +1074,14 @@ service Billing {
     };
   }
 
+  // Lists available cloud services and their associated SKUs for a given vendor.
+  // Use this to retrieve service codes and names that can be referenced in exclude service settings.
+  rpc ListServices(ListServicesRequest) returns (ListServicesResponse) {
+    option (google.api.http) = {
+      get: "/v1/{vendor}/services"
+    };
+  }
+
   // Link accounts to a billing group in bulk from a CSV file.
   // Returns a long-running operation. Poll status via the Operations service (GET /ops/v1/{name}).
   rpc BulkLinkAccount(BulkLinkAccountRequest) returns (protos.Operation) {
@@ -3677,6 +3685,37 @@ message ListExcludeServicesResponse {
   repeated ExcludeServiceEntry entries = 1;
 }
 
+// Represents a single service with its associated names and SKUs.
+message ServiceItem {
+  // Service ID.
+  string id = 1;
+
+  // Service code.
+  string code = 2;
+
+  // List of display names for this service.
+  repeated string names = 3;
+
+  // List of SKU codes under this service.
+  repeated string skus = 4;
+}
+
+message ListServicesRequest {
+  // Required. Cloud vendor (e.g., "gcp"). Bound from the URL path.
+  string vendor = 1;
+
+  // Optional. Service code to filter by.
+  // Example values: "6F81-5844-456A" (Cloud Storage), "95FF-2EF5-5EA1" (Compute Engine),
+  // "152E-C115-5142" (Cloud SQL).
+  // Use ListServices without this field to retrieve all available service codes.
+  string code = 2;
+}
+
+message ListServicesResponse {
+  // List of services.
+  repeated ServiceItem data = 1;
+}
+
 message BulkLinkAccountRequest {
   // Required. The cloud vendor for all accounts in this CSV.
   // Must be one of: aws, azure, gcp.
diff --git a/openapiv2/apidocs.swagger.json b/openapiv2/apidocs.swagger.json
index 9d4ed4df..6c2ae448 100644
--- a/openapiv2/apidocs.swagger.json
+++ b/openapiv2/apidocs.swagger.json
@@ -22148,6 +22148,45 @@
         ]
       }
     },
+    "/v1/{vendor}/services": {
+      "get": {
+        "summary": "Lists available cloud services and their associated SKUs for a given vendor.\nUse this to retrieve service codes and names that can be referenced in exclude service settings.",
+        "operationId": "Billing_ListServices",
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/v1ListServicesResponse"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "#/definitions/googlerpcStatus"
+            }
+          }
+        },
+        "parameters": [
+          {
+            "name": "vendor",
+            "description": "Required. Cloud vendor (e.g., \"gcp\"). Bound from the URL path.",
+            "in": "path",
+            "required": true,
+            "type": "string"
+          },
+          {
+            "name": "code",
+            "description": "Optional. Service code to filter by.\nExample values: \"6F81-5844-456A\" (Cloud Storage), \"95FF-2EF5-5EA1\" (Compute Engine),\n\"152E-C115-5142\" (Cloud SQL).\nUse ListServices without this field to retrieve all available service codes.",
+            "in": "query",
+            "required": false,
+            "type": "string"
+          }
+        ],
+        "tags": [
+          "Billing"
+        ]
+      }
+    },
     "/v1/{vendor}/services/{costGroupId}": {
       "get": {
         "summary": "Get list of supported services",
@@ -45635,6 +45674,19 @@
       },
       "description": "Response message for the Iam.ListRoles rpc."
     },
+    "v1ListServicesResponse": {
+      "type": "object",
+      "properties": {
+        "data": {
+          "type": "array",
+          "items": {
+            "type": "object",
+            "$ref": "#/definitions/v1ServiceItem"
+          },
+          "description": "List of services."
+        }
+      }
+    },
     "v1ListSharedResourcesResponse": {
       "type": "object",
       "properties": {
@@ -47950,6 +48002,34 @@
       },
       "description": "ServiceDiscountsExport resource definition."
     },
+    "v1ServiceItem": {
+      "type": "object",
+      "properties": {
+        "id": {
+          "type": "string",
+          "description": "Service ID."
+        },
+        "code": {
+          "type": "string",
+          "description": "Service code."
+        },
+        "names": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          },
+          "description": "List of display names for this service."
+        },
+        "skus": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          },
+          "description": "List of SKU codes under this service."
+        }
+      },
+      "description": "Represents a single service with its associated names and SKUs."
+    },
     "v1ServiceSummary": {
       "type": "object",
       "properties": {