diff --git a/apps/api/v1/test/lib/attendees/_post.test.ts b/apps/api/v1/test/lib/attendees/_post.test.ts
new file mode 100644
index 0000000000..aea3154b5a
--- /dev/null
+++ b/apps/api/v1/test/lib/attendees/_post.test.ts
@@ -0,0 +1,112 @@
+import prismaMock from "../../../../../../tests/libs/__mocks__/prismaMock";
+
+import type { Request, Response } from "express";
+import type { NextApiRequest, NextApiResponse } from "next";
+import { createMocks } from "node-mocks-http";
+import { describe, expect, test } from "vitest";
+
+import handler from "../../../pages/api/attendees/_post";
+
+type CustomNextApiRequest = NextApiRequest & Request;
+type CustomNextApiResponse = NextApiResponse & Response;
+
+describe("POST /api/attendees", () => {
+  describe("Errors", () => {
+    test("Returns 403 if user is not admin and has no booking", async () => {
+      const { req, res } = createMocks<CustomNextApiRequest, CustomNextApiResponse>({
+        method: "POST",
+        body: {
+          bookingId: 1,
+          email: "test@example.com",
+          name: "Test User",
+          timeZone: "UTC",
+        },
+      });
+
+      prismaMock.booking.findFirst.mockResolvedValue(null);
+
+      req.userId = 123;
+      // req.isAdmin = false;
+      await handler(req, res);
+
+      expect(res.statusCode).toBe(403);
+      expect(JSON.parse(res._getData()).message).toBe("Forbidden");
+    });
+
+    test("Returns 200 if user is admin", async () => {
+      const { req, res } = createMocks<CustomNextApiRequest, CustomNextApiResponse>({
+        method: "POST",
+        body: {
+          bookingId: 1,
+          email: "test@example.com",
+          name: "Test User",
+          timeZone: "UTC",
+        },
+      });
+
+      const attendeeData = {
+        id: 1,
+        email: "test@example.com",
+        name: "Test User",
+        timeZone: "UTC",
+        bookingId: 1,
+      };
+
+      prismaMock.attendee.create.mockResolvedValue(attendeeData);
+      req.isSystemWideAdmin = true;
+      req.userId = 123;
+      await handler(req, res);
+
+      expect(res.statusCode).toBe(200);
+      expect(JSON.parse(res._getData()).attendee).toEqual(attendeeData);
+      expect(JSON.parse(res._getData()).message).toBe("Attendee created successfully");
+    });
+
+    test("Returns 200 if user is not admin but has a booking", async () => {
+      const { req, res } = createMocks<CustomNextApiRequest, CustomNextApiResponse>({
+        method: "POST",
+        body: {
+          bookingId: 1,
+          email: "test@example.com",
+          name: "Test User",
+          timeZone: "UTC",
+        },
+      });
+
+      const userBooking = { id: 1 };
+
+      prismaMock.booking.findFirst.mockResolvedValue(userBooking);
+
+      const attendeeData = {
+        id: 1,
+        email: "test@example.com",
+        name: "Test User",
+        timeZone: "UTC",
+        bookingId: 1,
+      };
+
+      prismaMock.attendee.create.mockResolvedValue(attendeeData);
+
+      req.userId = 123;
+      await handler(req, res);
+
+      expect(res.statusCode).toBe(200);
+      expect(JSON.parse(res._getData()).attendee).toEqual(attendeeData);
+      expect(JSON.parse(res._getData()).message).toBe("Attendee created successfully");
+    });
+
+    test("Returns 400 if request body is invalid", async () => {
+      const { req, res } = createMocks<CustomNextApiRequest, CustomNextApiResponse>({
+        method: "POST",
+        body: {
+          // Missing required fields
+        },
+      });
+
+      req.userId = 123;
+      await handler(req, res);
+
+      expect(res.statusCode).toBe(400);
+    });
+  });
+});