diff --git a/src/features/auth/api/calls/index.ts b/src/features/auth/api/calls/index.ts
index f54d11b..b6bf91f 100644
--- a/src/features/auth/api/calls/index.ts
+++ b/src/features/auth/api/calls/index.ts
@@ -1 +1,2 @@
 export * from "./login";
+export * from "./register";
diff --git a/src/features/auth/api/calls/register/constants.ts b/src/features/auth/api/calls/register/constants.ts
new file mode 100644
index 0000000..1931ebc
--- /dev/null
+++ b/src/features/auth/api/calls/register/constants.ts
@@ -0,0 +1,6 @@
+export const REGISTER_API_ROUTE = "auth/register";
+
+// MOCKS
+export const MOCK_EMAIL = "test@test.com";
+export const MOCK_PASSWORD = "password";
+export const MOCK_TOKEN = "mock.access.token";
diff --git a/src/features/auth/api/calls/register/index.ts b/src/features/auth/api/calls/register/index.ts
new file mode 100644
index 0000000..15ae88b
--- /dev/null
+++ b/src/features/auth/api/calls/register/index.ts
@@ -0,0 +1,2 @@
+export { register } from "./register";
+export { REGISTER_API_ROUTE } from "./constants";
diff --git a/src/features/auth/api/calls/register/register.mock.ts b/src/features/auth/api/calls/register/register.mock.ts
new file mode 100644
index 0000000..84bff2f
--- /dev/null
+++ b/src/features/auth/api/calls/register/register.mock.ts
@@ -0,0 +1,25 @@
+import { http, HttpResponse } from "msw";
+import type { AuthData } from "../../../model/types/service";
+import { BASE_URL } from "shared/config";
+import { REGISTER_API_ROUTE, MOCK_EMAIL, MOCK_TOKEN } from "./constants";
+
+const REGISTER_URL = `${BASE_URL}/${REGISTER_API_ROUTE}`;
+
+/**
+ * Msw interceptor. Mocks the register endpoint response.
+ */
+export const registerMock = http.post(REGISTER_URL, async ({ request }) => {
+  const { email } = (await request.json()) as AuthData;
+
+  if (email === MOCK_EMAIL) {
+    return HttpResponse.json(
+      { message: "User already exists" },
+      { status: 409 },
+    );
+  }
+
+  return HttpResponse.json({
+    accessToken: MOCK_TOKEN,
+    user: { id: "2", email },
+  });
+});
diff --git a/src/features/auth/api/calls/register/register.spec.ts b/src/features/auth/api/calls/register/register.spec.ts
new file mode 100644
index 0000000..0baf51b
--- /dev/null
+++ b/src/features/auth/api/calls/register/register.spec.ts
@@ -0,0 +1,29 @@
+import { setupServer } from "msw/node";
+import { register } from "./register";
+import { registerMock } from "./register.mock";
+import { MOCK_EMAIL, MOCK_PASSWORD, MOCK_TOKEN } from "./constants";
+
+const server = setupServer(registerMock);
+
+describe("register", () => {
+  beforeAll(() => server.listen({ onUnhandledRequest: "error" }));
+  afterEach(() => server.resetHandlers());
+  afterAll(() => server.close());
+
+  describe("happy path", () => {
+    it("returns access token and user for a new email", async () => {
+      const result = await register({ email: "new@test.com", password: MOCK_PASSWORD });
+
+      expect(result.accessToken).toBe(MOCK_TOKEN);
+      expect(result.user).toEqual({ id: "2", email: "new@test.com" });
+    });
+  });
+
+  describe("error cases", () => {
+    it("throws when email is already registered", async () => {
+      await expect(
+        register({ email: MOCK_EMAIL, password: MOCK_PASSWORD }),
+      ).rejects.toThrow();
+    });
+  });
+});
diff --git a/src/features/auth/api/calls/register/register.ts b/src/features/auth/api/calls/register/register.ts
new file mode 100644
index 0000000..293acc3
--- /dev/null
+++ b/src/features/auth/api/calls/register/register.ts
@@ -0,0 +1,13 @@
+import { api } from "../../../api";
+import type { AuthData, AuthResponse } from "../../../model/types/service";
+import { REGISTER_API_ROUTE } from "./constants";
+
+/**
+ * Registers a new user with the given email and password.
+ *
+ * @param registerData - The user's registration data (email and password).
+ * @returns A promise that resolves to the authentication response.
+ */
+export function register(registerData: AuthData) {
+  return api.post(REGISTER_API_ROUTE, { json: registerData }).json<AuthResponse>();
+}