diff --git a/src/features/auth/model/stores/authStore/authStore.spec.ts b/src/features/auth/model/stores/authStore/authStore.spec.ts
index eba0cc9..19bcdc0 100644
--- a/src/features/auth/model/stores/authStore/authStore.spec.ts
+++ b/src/features/auth/model/stores/authStore/authStore.spec.ts
@@ -1,10 +1,5 @@
 import { setupServer } from "msw/node";
-import {
-  loginMock,
-  registerMock,
-  logoutMock,
-  refreshMock,
-} from "../../../api/calls";
+import * as apiCalls from "../../../api/calls";
 import { defaultStoreState, useAuthStore } from "./authStore";
 import {
   MOCK_EMAIL,
@@ -12,7 +7,16 @@ import {
   MOCK_PASSWORD,
 } from "../../../api/calls/mocks";
 
-const server = setupServer(loginMock, registerMock, logoutMock, refreshMock);
+const server = setupServer(
+  apiCalls.loginMock,
+  apiCalls.registerMock,
+  apiCalls.logoutMock,
+  apiCalls.refreshMock,
+);
+
+const loginSpy = vi.spyOn(apiCalls, "login");
+const registerSpy = vi.spyOn(apiCalls, "register");
+const logoutSpy = vi.spyOn(apiCalls, "logout");
 
 describe("authStore", () => {
   beforeAll(() => server.listen({ onUnhandledRequest: "error" }));
@@ -25,14 +29,18 @@ describe("authStore", () => {
   describe("setEmail", () => {
     it("should set the email in formData", () => {
       useAuthStore.getState().setEmail(MOCK_NEW_EMAIL);
-      expect(useAuthStore.getState().formData.email).toBe(MOCK_NEW_EMAIL);
+      expect(useAuthStore.getState().formData.email).toMatchObject({
+        value: MOCK_NEW_EMAIL,
+      });
     });
   });
 
   describe("setPassword", () => {
     it("should set the password in formData", () => {
       useAuthStore.getState().setPassword(MOCK_PASSWORD);
-      expect(useAuthStore.getState().formData.password).toBe(MOCK_PASSWORD);
+      expect(useAuthStore.getState().formData.password).toMatchObject({
+        value: MOCK_PASSWORD,
+      });
     });
   });
 
@@ -44,10 +52,33 @@ describe("authStore", () => {
   });
 
   describe("login", () => {
+    it("should not do api call if status is loading", async () => {
+      useAuthStore.getState().setEmail(MOCK_EMAIL);
+      useAuthStore.getState().setPassword(MOCK_PASSWORD);
+      useAuthStore.setState({ status: "loading" });
+
+      await useAuthStore.getState().login();
+
+      expect(loginSpy).not.toHaveBeenCalled();
+    });
+
+    it("should not do api call if form is invalid", async () => {
+      useAuthStore.getState().setEmail("");
+      useAuthStore.getState().setPassword("");
+
+      await useAuthStore.getState().login();
+
+      const { status } = useAuthStore.getState();
+
+      expect(loginSpy).not.toHaveBeenCalled();
+      expect(status).toBe("idle");
+    });
+
     it("should set access token, user data, and update status after successful login", async () => {
-      await useAuthStore
-        .getState()
-        .login({ email: MOCK_EMAIL, password: MOCK_PASSWORD });
+      useAuthStore.getState().setEmail(MOCK_EMAIL);
+      useAuthStore.getState().setPassword(MOCK_PASSWORD);
+
+      await useAuthStore.getState().login();
 
       const { user, status, error } = useAuthStore.getState();
 
@@ -57,9 +88,10 @@ describe("authStore", () => {
     });
 
     it("should set error and update status if login fails", async () => {
-      await useAuthStore
-        .getState()
-        .login({ email: "wrong@test.com", password: "wrongPassword" });
+      useAuthStore.getState().setEmail("wrong@test.com");
+      useAuthStore.getState().setPassword("wrongPassword");
+
+      await useAuthStore.getState().login();
 
       const { status, error } = useAuthStore.getState();
 
@@ -69,10 +101,33 @@ describe("authStore", () => {
   });
 
   describe("register", () => {
+    it("should not do api call if status is loading", async () => {
+      useAuthStore.getState().setEmail(MOCK_EMAIL);
+      useAuthStore.getState().setPassword(MOCK_PASSWORD);
+      useAuthStore.setState({ status: "loading" });
+
+      await useAuthStore.getState().register();
+
+      expect(registerSpy).not.toHaveBeenCalled();
+    });
+
+    it("should not do api call if form is invalid", async () => {
+      useAuthStore.getState().setEmail("");
+      useAuthStore.getState().setPassword("");
+
+      await useAuthStore.getState().register();
+
+      const { status } = useAuthStore.getState();
+
+      expect(registerSpy).not.toHaveBeenCalled();
+      expect(status).toBe("idle");
+    });
+
     it("should set access token, user data, and update status after successful registration", async () => {
-      await useAuthStore
-        .getState()
-        .register({ email: MOCK_NEW_EMAIL, password: MOCK_PASSWORD });
+      useAuthStore.getState().setEmail(MOCK_NEW_EMAIL);
+      useAuthStore.getState().setPassword(MOCK_PASSWORD);
+
+      await useAuthStore.getState().register();
 
       const { user, status, error } = useAuthStore.getState();
 
@@ -82,9 +137,10 @@ describe("authStore", () => {
     });
 
     it("should set error and update status if registration fails", async () => {
-      await useAuthStore
-        .getState()
-        .register({ email: MOCK_EMAIL, password: MOCK_PASSWORD });
+      useAuthStore.getState().setEmail(MOCK_EMAIL);
+      useAuthStore.getState().setPassword(MOCK_PASSWORD);
+
+      await useAuthStore.getState().register();
 
       const { status, error } = useAuthStore.getState();
 
@@ -94,6 +150,14 @@ describe("authStore", () => {
   });
 
   describe("logout", () => {
+    it("should not do api call if status is loading", async () => {
+      useAuthStore.setState({ status: "loading" });
+
+      await useAuthStore.getState().logout();
+
+      expect(logoutSpy).not.toHaveBeenCalled();
+    });
+
     it("should clear access token, user data, and update status after logout", async () => {
       await useAuthStore.getState().logout();
 
diff --git a/src/features/auth/model/stores/authStore/authStore.ts b/src/features/auth/model/stores/authStore/authStore.ts
index ccda162..152ee4e 100644
--- a/src/features/auth/model/stores/authStore/authStore.ts
+++ b/src/features/auth/model/stores/authStore/authStore.ts
@@ -3,33 +3,66 @@ import type { AuthStore, AuthStoreState } from "../../types/store";
 import { login, logout, register } from "../../../api";
 import { callApi } from "shared/utils";
 import { UNEXPECTED_ERROR_MESSAGE } from "shared/api";
+import { selectAuthData, selectFormValid } from "../../selectors";
 
 export const defaultStoreState: Readonly<AuthStoreState> = {
   formData: {
-    email: "",
-    password: "",
+    email: { value: "", valid: false },
+    password: { value: "", valid: false },
   },
   user: undefined,
   status: "idle",
   error: null,
 };
 
-export const useAuthStore = create<AuthStore>()((set) => ({
+function validateEmail(email: string): boolean {
+  return Boolean(email);
+}
+
+function validatePassword(password: string): boolean {
+  return Boolean(password);
+}
+
+export const useAuthStore = create<AuthStore>()((set, get) => ({
   ...defaultStoreState,
 
   setEmail: (email: string) => {
-    set((state) => ({ formData: { ...state.formData, email } }));
+    const isValid = validateEmail(email);
+    set((state) => ({
+      formData: { ...state.formData, email: { value: email, valid: isValid } },
+    }));
   },
   setPassword: (password: string) => {
-    set((state) => ({ formData: { ...state.formData, password } }));
+    const isValid = validatePassword(password);
+    set((state) => ({
+      formData: {
+        ...state.formData,
+        password: { value: password, valid: isValid },
+      },
+    }));
   },
   reset: () => {
     set(defaultStoreState);
   },
 
-  login: async (loginData) => {
+  login: async () => {
+    const { status } = get();
+
+    if (status === "loading") {
+      return;
+    }
+
     set({ status: "loading" });
+
+    const formValid = selectFormValid(get());
+
+    if (!formValid) {
+      set({ status: "idle" });
+      return;
+    }
+
     try {
+      const loginData = selectAuthData(get());
       const [responseData, loginError] = await callApi(() => login(loginData));
 
       if (loginError) {
@@ -42,8 +75,6 @@ export const useAuthStore = create<AuthStore>()((set) => ({
         user: responseData?.user,
         error: null,
       });
-
-      // useTokenStore.setState({ accessToken: responseData?.accessToken });
     } catch (err) {
       console.error(err);
       set({
@@ -52,8 +83,24 @@ export const useAuthStore = create<AuthStore>()((set) => ({
       });
     }
   },
-  register: async (registerData) => {
+  register: async () => {
+    const { status } = get();
+
+    if (status === "loading") {
+      return;
+    }
+
+    set({ status: "loading" });
+
+    const formValid = selectFormValid(get());
+
+    if (!formValid) {
+      set({ status: "idle" });
+      return;
+    }
+
     try {
+      const registerData = selectAuthData(get());
       const [responseData, registerError] = await callApi(() =>
         register(registerData),
       );
@@ -68,8 +115,6 @@ export const useAuthStore = create<AuthStore>()((set) => ({
         user: responseData?.user,
         error: null,
       });
-
-      // useTokenStore.setState({ accessToken: responseData?.accessToken });
     } catch (err) {
       console.error(err);
       set({
@@ -79,12 +124,18 @@ export const useAuthStore = create<AuthStore>()((set) => ({
     }
   },
   logout: async () => {
+    const prevStatus = get().status;
+
+    if (prevStatus === "loading") {
+      return;
+    }
+
     set({ status: "loading" });
     try {
       const [, logoutError] = await callApi(() => logout());
 
       if (logoutError) {
-        set({ error: logoutError });
+        set({ error: logoutError, status: prevStatus });
         return;
       }
 
diff --git a/src/features/auth/model/types/store.ts b/src/features/auth/model/types/store.ts
index 5dc9606..d84b8ba 100644
--- a/src/features/auth/model/types/store.ts
+++ b/src/features/auth/model/types/store.ts
@@ -2,13 +2,20 @@ import type { User } from "entities/User";
 import type { AuthData, AuthStatus } from "./service";
 import type { ApiError } from "shared/utils";
 
+export type AuthFormData = {
+  [K in keyof AuthData]: {
+    value: AuthData[K];
+    valid: boolean;
+  };
+};
+
 export interface AuthStoreState {
   /**
    * Form data for login/register forms
    */
-  formData: AuthData;
+  formData: AuthFormData;
   /**
-   * User's credentials
+   * Current user
    */
   user?: User;
   /**
@@ -26,8 +33,8 @@ export interface AuthStoreActions {
   setPassword: (password: string) => void;
   reset: () => void;
 
-  login: (data: AuthData) => Promise<void>;
-  register: (data: AuthData) => Promise<void>;
+  login: () => Promise<void>;
+  register: () => Promise<void>;
   logout: () => Promise<void>;
 }