diff --git a/src/typed-method-types/apps.ts b/src/typed-method-types/apps.ts
index 3a023fc..0e4f836 100644
--- a/src/typed-method-types/apps.ts
+++ b/src/typed-method-types/apps.ts
@@ -6,6 +6,22 @@ import {
 } from "../types.ts";
 
 // apps.datastore Types
+type DynamoQueryArgs = {
+  /**
+   * @description A query filter expression
+   * @see {@link https://api.slack.com/automation/datastores-retrieve#filter-expressions}.
+   */
+  expression?: string;
+  /**
+   * @description A map of attributes referenced in `expression`
+   */
+  "expression_attributes"?: Record<string, string>;
+  /**
+   * @description A map of values referenced in `expression`
+   */
+  "expression_values"?: Record<string, string | boolean | number>;
+};
+
 export type DatastoreSchema = {
   name: string;
   // deno-lint-ignore no-explicit-any
@@ -182,14 +198,12 @@ export type DatastoreQueryArgs<
 > =
   & BaseMethodArgs
   & CursorPaginationArgs
+  & DynamoQueryArgs
   & {
     /**
      * @description The name of the datastore
      */
     datastore: Schema["name"];
-    expression?: string;
-    "expression_attributes"?: Record<string, string>;
-    "expression_values"?: Record<string, string | boolean | number>;
   };
 
 export type DatastoreQueryResponse<
@@ -208,6 +222,33 @@ export type DatastoreQueryResponse<
     items: DatastoreItem<Schema>[];
   };
 
+export type DatastoreCountArgs<
+  Schema extends DatastoreSchema,
+> =
+  & BaseMethodArgs
+  & DynamoQueryArgs
+  & {
+    /**
+     * @description The name of the datastore
+     */
+    datastore: Schema["name"];
+  };
+
+export type DatastoreCountResponse<
+  Schema extends DatastoreSchema,
+> =
+  & BaseResponse
+  & {
+    /**
+     * @description The name of the datastore
+     */
+    datastore: Schema["name"];
+    /**
+     * @description The number of items matching your query
+     */
+    count: number;
+  };
+
 export type DatastoreDeleteArgs<
   Schema extends DatastoreSchema,
 > =
@@ -293,6 +334,11 @@ export type AppsDatastoreQuery = {
     args: DatastoreQueryArgs<Schema>,
   ): Promise<DatastoreQueryResponse<Schema>>;
 };
+export type AppsDatastoreCount = {
+  <Schema extends DatastoreSchema>(
+    args: DatastoreCountArgs<Schema>,
+  ): Promise<DatastoreCountResponse<Schema>>;
+};
 export type AppsDatastoreDelete = {
   <Schema extends DatastoreSchema>(
     args: DatastoreDeleteArgs<Schema>,
@@ -368,6 +414,7 @@ export type TypedAppsMethodTypes = {
       bulkPut: AppsDatastoreBulkPut;
       update: AppsDatastoreUpdate;
       query: AppsDatastoreQuery;
+      count: AppsDatastoreCount;
       delete: AppsDatastoreDelete;
       bulkDelete: AppsDatastoreBulkDelete;
     };
diff --git a/src/typed-method-types/mod.ts b/src/typed-method-types/mod.ts
index 3c89b94..c01f3b3 100644
--- a/src/typed-method-types/mod.ts
+++ b/src/typed-method-types/mod.ts
@@ -20,6 +20,7 @@ export const methodsWithCustomTypes = [
   "apps.datastore.bulkPut",
   "apps.datastore.update",
   "apps.datastore.query",
+  "apps.datastore.count",
   "apps.auth.external.get",
   "apps.auth.external.delete",
   "chat.postMessage",
diff --git a/src/typed-method-types/typed-method-tests.ts b/src/typed-method-types/typed-method-tests.ts
index 8fe867a..ee6ac9f 100644
--- a/src/typed-method-types/typed-method-tests.ts
+++ b/src/typed-method-types/typed-method-tests.ts
@@ -12,6 +12,7 @@ Deno.test("Custom Type Methods are valid functions", () => {
   assertEquals(typeof client.apps.datastore.bulkPut, "function");
   assertEquals(typeof client.apps.datastore.update, "function");
   assertEquals(typeof client.apps.datastore.query, "function");
+  assertEquals(typeof client.apps.datastore.count, "function");
   assertEquals(typeof client.apps.auth.external.get, "function");
   assertEquals(typeof client.apps.auth.external.delete, "function");
   assertEquals(typeof client.workflows.triggers.create, "function");