diff --git a/packages/lib/services/actionClass.ts b/packages/lib/services/actionClass.ts
index 480d3a3161..d4c5c34518 100644
--- a/packages/lib/services/actionClass.ts
+++ b/packages/lib/services/actionClass.ts
@@ -2,8 +2,11 @@
 import "server-only";
 
 import { prisma } from "@formbricks/database";
+import { TActionClass, TActionClassInput, ZActionClassInput } from "@formbricks/types/v1/actionClasses";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
+import { cache } from "react";
 import { DatabaseError, ResourceNotFoundError } from "@formbricks/types/v1/errors";
-import { TActionClass, TActionClassInput } from "@formbricks/types/v1/actionClasses";
 
 const select = {
   id: true,
@@ -16,7 +19,8 @@ const select = {
   environmentId: true,
 };
 
-export const getActionClasses = async (environmentId: string): Promise<TActionClass[]> => {
+export const getActionClasses = cache(async (environmentId: string): Promise<TActionClass[]> => {
+  validateInputs([environmentId, ZId]);
   try {
     let actionClasses = await prisma.eventClass.findMany({
       where: {
@@ -32,12 +36,13 @@ export const getActionClasses = async (environmentId: string): Promise<TActionCl
   } catch (error) {
     throw new DatabaseError(`Database error when fetching actions for environment ${environmentId}`);
   }
-};
+});
 
 export const deleteActionClass = async (
   environmentId: string,
   actionClassId: string
 ): Promise<TActionClass> => {
+  validateInputs([environmentId, ZId], [actionClassId, ZId]);
   try {
     const result = await prisma.eventClass.delete({
       where: {
@@ -59,6 +64,7 @@ export const createActionClass = async (
   environmentId: string,
   actionClass: TActionClassInput
 ): Promise<TActionClass> => {
+  validateInputs([environmentId, ZId], [actionClass, ZActionClassInput]);
   try {
     const result = await prisma.eventClass.create({
       data: {
@@ -83,6 +89,7 @@ export const updateActionClass = async (
   actionClassId: string,
   inputActionClass: Partial<TActionClassInput>
 ): Promise<TActionClass> => {
+  validateInputs([environmentId, ZId], [actionClassId, ZId], [inputActionClass, ZActionClassInput.partial()]);
   try {
     const result = await prisma.eventClass.update({
       where: {
diff --git a/packages/lib/services/actions.ts b/packages/lib/services/actions.ts
index 64b5301431..c254e27cde 100644
--- a/packages/lib/services/actions.ts
+++ b/packages/lib/services/actions.ts
@@ -1,12 +1,17 @@
+import "server-only";
+
+import z from "zod";
 import { prisma } from "@formbricks/database";
 import { DatabaseError } from "@formbricks/types/v1/errors";
 import { TAction } from "@formbricks/types/v1/actions";
+import { ZId } from "@formbricks/types/v1/environment";
 import { Prisma } from "@prisma/client";
 import { cache } from "react";
-import "server-only";
+import { validateInputs } from "../utils/validate";
 
 export const getActionsByEnvironmentId = cache(
   async (environmentId: string, limit?: number): Promise<TAction[]> => {
+    validateInputs([environmentId, ZId], [limit, z.number().optional()]);
     try {
       const actionsPrisma = await prisma.event.findMany({
         where: {
diff --git a/packages/lib/services/activity.tsx b/packages/lib/services/activity.tsx
index 8cb9ba547f..55ba044ffd 100644
--- a/packages/lib/services/activity.tsx
+++ b/packages/lib/services/activity.tsx
@@ -1,7 +1,13 @@
+import "server-only";
+
 import { prisma } from "@formbricks/database";
 import { TActivityFeedItem } from "@formbricks/types/v1/activity";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
+import { cache } from "react";
 
-export const getActivityTimeline = async (personId: string): Promise<TActivityFeedItem[]> => {
+export const getActivityTimeline = cache(async (personId: string): Promise<TActivityFeedItem[]> => {
+  validateInputs([personId, ZId]);
   const person = await prisma.person.findUnique({
     where: {
       id: personId,
@@ -75,4 +81,4 @@ export const getActivityTimeline = async (personId: string): Promise<TActivityFe
   const unifiedList: TActivityFeedItem[] = [...unifiedAttributes, ...unifiedDisplays, ...unifiedEvents];
 
   return unifiedList;
-};
+});
diff --git a/packages/lib/services/apiKey.ts b/packages/lib/services/apiKey.ts
index e4a318ffe3..3794d9ca8f 100644
--- a/packages/lib/services/apiKey.ts
+++ b/packages/lib/services/apiKey.ts
@@ -1,14 +1,17 @@
 import "server-only";
-
+import z from "zod";
 import { prisma } from "@formbricks/database";
-import { TApiKey, TApiKeyCreateInput } from "@formbricks/types/v1/apiKeys";
+import { TApiKey, TApiKeyCreateInput, ZApiKeyCreateInput } from "@formbricks/types/v1/apiKeys";
 import { Prisma } from "@prisma/client";
 import { getHash } from "../crypto";
 import { createHash, randomBytes } from "crypto";
 import { DatabaseError, InvalidInputError, ResourceNotFoundError } from "@formbricks/types/v1/errors";
 import { cache } from "react";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
 
 export const getApiKey = async (apiKey: string): Promise<TApiKey | null> => {
+  validateInputs([apiKey, z.string()]);
   if (!apiKey) {
     throw new InvalidInputError("API key cannot be null or undefined.");
   }
@@ -35,6 +38,7 @@ export const getApiKey = async (apiKey: string): Promise<TApiKey | null> => {
 };
 
 export const getApiKeys = cache(async (environmentId: string): Promise<TApiKey[]> => {
+  validateInputs([environmentId, ZId]);
   try {
     const apiKeys = await prisma.apiKey.findMany({
       where: {
@@ -54,6 +58,7 @@ export const getApiKeys = cache(async (environmentId: string): Promise<TApiKey[]
 export const hashApiKey = (key: string): string => createHash("sha256").update(key).digest("hex");
 
 export async function createApiKey(environmentId: string, apiKeyData: TApiKeyCreateInput): Promise<TApiKey> {
+  validateInputs([environmentId, ZId], [apiKeyData, ZApiKeyCreateInput]);
   try {
     const key = randomBytes(16).toString("hex");
     const hashedKey = hashApiKey(key);
@@ -76,6 +81,7 @@ export async function createApiKey(environmentId: string, apiKeyData: TApiKeyCre
 }
 
 export const getApiKeyFromKey = async (apiKey: string): Promise<TApiKey | null> => {
+  validateInputs([apiKey, z.string()]);
   if (!apiKey) {
     throw new InvalidInputError("API key cannot be null or undefined.");
   }
@@ -98,6 +104,7 @@ export const getApiKeyFromKey = async (apiKey: string): Promise<TApiKey | null>
 };
 
 export const deleteApiKey = async (id: string): Promise<void> => {
+  validateInputs([id, ZId]);
   try {
     await prisma.apiKey.delete({
       where: {
diff --git a/packages/lib/services/attributeClass.ts b/packages/lib/services/attributeClass.ts
index 9ec60b3b65..619a5505f4 100644
--- a/packages/lib/services/attributeClass.ts
+++ b/packages/lib/services/attributeClass.ts
@@ -1,8 +1,14 @@
 "use server";
 import "server-only";
 import { prisma } from "@formbricks/database";
+import {
+  TAttributeClass,
+  TAttributeClassUpdateInput,
+  ZAttributeClassUpdateInput,
+} from "@formbricks/types/v1/attributeClasses";
+import { ZId } from "@formbricks/types/v1/environment";
+import { validateInputs } from "../utils/validate";
 import { DatabaseError } from "@formbricks/types/v1/errors";
-import { TAttributeClass } from "@formbricks/types/v1/attributeClasses";
 import { cache } from "react";
 
 export const transformPrismaAttributeClass = (attributeClass: any): TAttributeClass | null => {
@@ -18,6 +24,7 @@ export const transformPrismaAttributeClass = (attributeClass: any): TAttributeCl
 };
 
 export const getAttributeClasses = cache(async (environmentId: string): Promise<TAttributeClass[]> => {
+  validateInputs([environmentId, ZId]);
   try {
     let attributeClasses = await prisma.attributeClass.findMany({
       where: {
@@ -39,8 +46,9 @@ export const getAttributeClasses = cache(async (environmentId: string): Promise<
 
 export const updatetAttributeClass = async (
   attributeClassId: string,
-  data: { description?: string; archived?: boolean }
+  data: Partial<TAttributeClassUpdateInput>
 ): Promise<TAttributeClass | null> => {
+  validateInputs([attributeClassId, ZId], [data, ZAttributeClassUpdateInput.partial()]);
   try {
     let attributeClass = await prisma.attributeClass.update({
       where: {
diff --git a/packages/lib/services/displays.ts b/packages/lib/services/displays.ts
index 5c7be7cefd..cec20cd679 100644
--- a/packages/lib/services/displays.ts
+++ b/packages/lib/services/displays.ts
@@ -1,8 +1,16 @@
 import { prisma } from "@formbricks/database";
-import { TDisplay, TDisplayInput, TDisplaysWithSurveyName } from "@formbricks/types/v1/displays";
+import {
+  TDisplay,
+  TDisplayInput,
+  TDisplaysWithSurveyName,
+  ZDisplayInput,
+} from "@formbricks/types/v1/displays";
 import { Prisma } from "@prisma/client";
 import { DatabaseError, ResourceNotFoundError } from "@formbricks/types/v1/errors";
 import { transformPrismaPerson } from "./person";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
+import { cache } from "react";
 
 const selectDisplay = {
   id: true,
@@ -30,6 +38,7 @@ const selectDisplay = {
 };
 
 export const createDisplay = async (displayInput: TDisplayInput): Promise<TDisplay> => {
+  validateInputs([displayInput, ZDisplayInput]);
   try {
     const displayPrisma = await prisma.display.create({
       data: {
@@ -67,6 +76,7 @@ export const createDisplay = async (displayInput: TDisplayInput): Promise<TDispl
 };
 
 export const markDisplayResponded = async (displayId: string): Promise<TDisplay> => {
+  validateInputs([displayId, ZId]);
   try {
     if (!displayId) throw new Error("Display ID is required");
 
@@ -99,51 +109,54 @@ export const markDisplayResponded = async (displayId: string): Promise<TDisplay>
   }
 };
 
-export const getDisplaysOfPerson = async (personId: string): Promise<TDisplaysWithSurveyName[] | null> => {
-  try {
-    const displaysPrisma = await prisma.display.findMany({
-      where: {
-        personId: personId,
-      },
-      select: {
-        id: true,
-        createdAt: true,
-        updatedAt: true,
-        surveyId: true,
-        survey: {
-          select: {
-            name: true,
-          },
+export const getDisplaysOfPerson = cache(
+  async (personId: string): Promise<TDisplaysWithSurveyName[] | null> => {
+    validateInputs([personId, ZId]);
+    try {
+      const displaysPrisma = await prisma.display.findMany({
+        where: {
+          personId: personId,
         },
-        status: true,
-      },
-    });
+        select: {
+          id: true,
+          createdAt: true,
+          updatedAt: true,
+          surveyId: true,
+          survey: {
+            select: {
+              name: true,
+            },
+          },
+          status: true,
+        },
+      });
 
-    if (!displaysPrisma) {
-      throw new ResourceNotFoundError("Display from PersonId", personId);
+      if (!displaysPrisma) {
+        throw new ResourceNotFoundError("Display from PersonId", personId);
+      }
+
+      let displays: TDisplaysWithSurveyName[] = [];
+
+      displaysPrisma.forEach((displayPrisma) => {
+        const display: TDisplaysWithSurveyName = {
+          id: displayPrisma.id,
+          createdAt: displayPrisma.createdAt,
+          updatedAt: displayPrisma.updatedAt,
+          person: null,
+          status: displayPrisma.status,
+          surveyId: displayPrisma.surveyId,
+          surveyName: displayPrisma.survey.name,
+        };
+        displays.push(display);
+      });
+
+      return displays;
+    } catch (error) {
+      if (error instanceof Prisma.PrismaClientKnownRequestError) {
+        throw new DatabaseError("Database operation failed");
+      }
+
+      throw error;
     }
-
-    let displays: TDisplaysWithSurveyName[] = [];
-
-    displaysPrisma.forEach((displayPrisma) => {
-      const display: TDisplaysWithSurveyName = {
-        id: displayPrisma.id,
-        createdAt: displayPrisma.createdAt,
-        updatedAt: displayPrisma.updatedAt,
-        person: null,
-        status: displayPrisma.status,
-        surveyId: displayPrisma.surveyId,
-        surveyName: displayPrisma.survey.name,
-      };
-      displays.push(display);
-    });
-
-    return displays;
-  } catch (error) {
-    if (error instanceof Prisma.PrismaClientKnownRequestError) {
-      throw new DatabaseError("Database operation failed");
-    }
-
-    throw error;
   }
-};
+);
diff --git a/packages/lib/services/environment.ts b/packages/lib/services/environment.ts
index 5fc46353f5..a975f290f0 100644
--- a/packages/lib/services/environment.ts
+++ b/packages/lib/services/environment.ts
@@ -2,12 +2,14 @@ import "server-only";
 import { prisma } from "@formbricks/database";
 import { z } from "zod";
 import { Prisma } from "@prisma/client";
+import { ZEnvironment, ZEnvironmentUpdateInput, ZId } from "@formbricks/types/v1/environment";
 import { DatabaseError, ResourceNotFoundError, ValidationError } from "@formbricks/types/v1/errors";
-import { ZEnvironment } from "@formbricks/types/v1/environment";
 import type { TEnvironment, TEnvironmentUpdateInput } from "@formbricks/types/v1/environment";
 import { cache } from "react";
+import { validateInputs } from "../utils/validate";
 
 export const getEnvironment = cache(async (environmentId: string): Promise<TEnvironment> => {
+  validateInputs([environmentId, ZId]);
   let environmentPrisma;
   try {
     environmentPrisma = await prisma.environment.findUnique({
@@ -39,6 +41,7 @@ export const getEnvironment = cache(async (environmentId: string): Promise<TEnvi
 });
 
 export const getEnvironments = cache(async (productId: string): Promise<TEnvironment[]> => {
+  validateInputs([productId, ZId]);
   let productPrisma;
   try {
     productPrisma = await prisma.product.findFirst({
@@ -80,6 +83,7 @@ export const updateEnvironment = async (
   environmentId: string,
   data: Partial<TEnvironmentUpdateInput>
 ): Promise<TEnvironment> => {
+  validateInputs([environmentId, ZId], [data, ZEnvironmentUpdateInput.partial()]);
   const newData = { ...data, updatedAt: new Date() };
   let updatedEnvironment;
   try {
diff --git a/packages/lib/services/person.ts b/packages/lib/services/person.ts
index 9b6101b2c9..8e4118484d 100644
--- a/packages/lib/services/person.ts
+++ b/packages/lib/services/person.ts
@@ -5,6 +5,8 @@ import { DatabaseError, ResourceNotFoundError } from "@formbricks/types/v1/error
 import { TPerson } from "@formbricks/types/v1/people";
 import { Prisma } from "@prisma/client";
 import { cache } from "react";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
 import { getAttributeClassByName } from "./attributeClass";
 
 export const selectPerson = {
@@ -58,6 +60,7 @@ export const transformPrismaPerson = (person: TransformPersonInput): TPerson =>
 };
 
 export const getPerson = cache(async (personId: string): Promise<TPerson | null> => {
+  validateInputs([personId, ZId]);
   try {
     const personPrisma = await prisma.person.findUnique({
       where: {
@@ -83,6 +86,7 @@ export const getPerson = cache(async (personId: string): Promise<TPerson | null>
 });
 
 export const getPeople = cache(async (environmentId: string): Promise<TPerson[]> => {
+  validateInputs([environmentId, ZId]);
   try {
     const personsPrisma = await prisma.person.findMany({
       where: {
@@ -109,6 +113,7 @@ export const getPeople = cache(async (environmentId: string): Promise<TPerson[]>
 });
 
 export const createPerson = async (environmentId: string): Promise<TPerson> => {
+  validateInputs([environmentId, ZId]);
   try {
     const personPrisma = await prisma.person.create({
       data: {
@@ -134,6 +139,7 @@ export const createPerson = async (environmentId: string): Promise<TPerson> => {
 };
 
 export const deletePerson = async (personId: string): Promise<void> => {
+  validateInputs([personId, ZId]);
   try {
     await prisma.person.delete({
       where: {
diff --git a/packages/lib/services/product.ts b/packages/lib/services/product.ts
index cdd708f4db..5dd9ccbf58 100644
--- a/packages/lib/services/product.ts
+++ b/packages/lib/services/product.ts
@@ -1,11 +1,13 @@
+import "server-only";
 import { prisma } from "@formbricks/database";
+import { z } from "zod";
+import { Prisma } from "@prisma/client";
+import { ZProduct, ZProductUpdateInput } from "@formbricks/types/v1/product";
 import { DatabaseError, ValidationError } from "@formbricks/types/v1/errors";
 import type { TProduct, TProductUpdateInput } from "@formbricks/types/v1/product";
-import { ZProduct } from "@formbricks/types/v1/product";
-import { Prisma } from "@prisma/client";
 import { cache } from "react";
-import "server-only";
-import { z } from "zod";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
 
 const selectProduct = {
   id: true,
@@ -23,6 +25,7 @@ const selectProduct = {
 };
 
 export const getProducts = cache(async (teamId: string): Promise<TProduct[]> => {
+  validateInputs([teamId, ZId]);
   try {
     const products = await prisma.product.findMany({
       where: {
@@ -71,6 +74,7 @@ export const updateProduct = async (
   productId: string,
   inputProduct: Partial<TProductUpdateInput>
 ): Promise<TProduct> => {
+  validateInputs([productId, ZId], [inputProduct, ZProductUpdateInput]);
   let updatedProduct;
   try {
     updatedProduct = await prisma.product.update({
diff --git a/packages/lib/services/profile.ts b/packages/lib/services/profile.ts
index abb81c5879..44fda97daf 100644
--- a/packages/lib/services/profile.ts
+++ b/packages/lib/services/profile.ts
@@ -1,10 +1,14 @@
 import { prisma } from "@formbricks/database";
 import { DatabaseError, ResourceNotFoundError } from "@formbricks/types/v1/errors";
 import { Prisma } from "@prisma/client";
-import { TProfile } from "@formbricks/types/v1/profile";
+import { TProfile, ZProfileUpdateInput } from "@formbricks/types/v1/profile";
 import { deleteTeam } from "./team";
 import { MembershipRole } from "@prisma/client";
 import { cache } from "react";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
+import { TMembership, TMembershipRole, ZMembershipRole } from "@formbricks/types/v1/membership";
+import { TProfileUpdateInput } from "@formbricks/types/v1/profile";
 
 const responseSelection = {
   id: true,
@@ -14,13 +18,9 @@ const responseSelection = {
   updatedAt: true,
 };
 
-interface Membership {
-  role: MembershipRole;
-  userId: string;
-}
-
 // function to retrive basic information about a user's profile
 export const getProfile = cache(async (userId: string): Promise<TProfile | null> => {
+  validateInputs([userId, ZId]);
   try {
     const profile = await prisma.user.findUnique({
       where: {
@@ -43,7 +43,8 @@ export const getProfile = cache(async (userId: string): Promise<TProfile | null>
   }
 });
 
-const updateUserMembership = async (teamId: string, userId: string, role: MembershipRole) => {
+const updateUserMembership = async (teamId: string, userId: string, role: TMembershipRole) => {
+  validateInputs([teamId, ZId], [userId, ZId], [role, ZMembershipRole]);
   await prisma.membership.update({
     where: {
       userId_teamId: {
@@ -57,11 +58,12 @@ const updateUserMembership = async (teamId: string, userId: string, role: Member
   });
 };
 
-const getAdminMemberships = (memberships: Membership[]) =>
+const getAdminMemberships = (memberships: TMembership[]) =>
   memberships.filter((membership) => membership.role === MembershipRole.admin);
 
 // function to update a user's profile
-export const updateProfile = async (personId: string, data: Prisma.UserUpdateInput): Promise<TProfile> => {
+export const updateProfile = async (personId: string, data: TProfileUpdateInput): Promise<TProfile> => {
+  validateInputs([personId, ZId], [data, ZProfileUpdateInput]);
   try {
     const updatedProfile = await prisma.user.update({
       where: {
@@ -80,6 +82,7 @@ export const updateProfile = async (personId: string, data: Prisma.UserUpdateInp
   }
 };
 const deleteUser = async (userId: string) => {
+  validateInputs([userId, ZId]);
   await prisma.user.delete({
     where: {
       id: userId,
@@ -89,6 +92,7 @@ const deleteUser = async (userId: string) => {
 
 // function to delete a user's profile including teams
 export const deleteProfile = async (personId: string): Promise<void> => {
+  validateInputs([personId, ZId]);
   try {
     const currentUserMemberships = await prisma.membership.findMany({
       where: {
diff --git a/packages/lib/services/response.ts b/packages/lib/services/response.ts
index 2fd7e39d18..e17884ce54 100644
--- a/packages/lib/services/response.ts
+++ b/packages/lib/services/response.ts
@@ -1,6 +1,12 @@
 import { prisma } from "@formbricks/database";
+import {
+  TResponse,
+  TResponseInput,
+  TResponseUpdateInput,
+  ZResponseInput,
+  ZResponseUpdateInput,
+} from "@formbricks/types/v1/responses";
 import { DatabaseError, ResourceNotFoundError } from "@formbricks/types/v1/errors";
-import { TResponse, TResponseInput, TResponseUpdateInput } from "@formbricks/types/v1/responses";
 import { TPerson } from "@formbricks/types/v1/people";
 import { TTag } from "@formbricks/types/v1/tags";
 import { Prisma } from "@prisma/client";
@@ -8,6 +14,8 @@ import { cache } from "react";
 import "server-only";
 import { getPerson, transformPrismaPerson } from "./person";
 import { captureTelemetry } from "../telemetry";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
 
 const responseSelection = {
   id: true,
@@ -65,6 +73,7 @@ const responseSelection = {
 };
 
 export const getResponsesByPersonId = async (personId: string): Promise<Array<TResponse> | null> => {
+  validateInputs([personId, ZId]);
   try {
     const responsePrisma = await prisma.response.findMany({
       where: {
@@ -98,6 +107,7 @@ export const getResponsesByPersonId = async (personId: string): Promise<Array<TR
 };
 
 export const createResponse = async (responseInput: Partial<TResponseInput>): Promise<TResponse> => {
+  validateInputs([responseInput, ZResponseInput.partial()]);
   captureTelemetry("response created");
   try {
     let person: TPerson | null = null;
@@ -145,6 +155,7 @@ export const createResponse = async (responseInput: Partial<TResponseInput>): Pr
 };
 
 export const getResponse = async (responseId: string): Promise<TResponse | null> => {
+  validateInputs([responseId, ZId]);
   try {
     const responsePrisma = await prisma.response.findUnique({
       where: {
@@ -174,10 +185,12 @@ export const getResponse = async (responseId: string): Promise<TResponse | null>
 };
 
 export const preloadSurveyResponses = (surveyId: string) => {
+  validateInputs([surveyId, ZId]);
   void getSurveyResponses(surveyId);
 };
 
 export const getSurveyResponses = cache(async (surveyId: string): Promise<TResponse[]> => {
+  validateInputs([surveyId, ZId]);
   try {
     const responsesPrisma = await prisma.response.findMany({
       where: {
@@ -212,6 +225,7 @@ export const preloadEnvironmentResponses = (environmentId: string) => {
 };
 
 export const getEnvironmentResponses = cache(async (environmentId: string): Promise<TResponse[]> => {
+  validateInputs([environmentId, ZId]);
   try {
     const responsesPrisma = await prisma.response.findMany({
       where: {
@@ -247,6 +261,7 @@ export const updateResponse = async (
   responseId: string,
   responseInput: TResponseUpdateInput
 ): Promise<TResponse> => {
+  validateInputs([responseId, ZId], [responseInput, ZResponseUpdateInput]);
   try {
     const currentResponse = await getResponse(responseId);
 
diff --git a/packages/lib/services/session.ts b/packages/lib/services/session.ts
index d5acf2298d..d74150328a 100644
--- a/packages/lib/services/session.ts
+++ b/packages/lib/services/session.ts
@@ -6,6 +6,8 @@ import { DatabaseError } from "@formbricks/types/v1/errors";
 import { TSession, TSessionWithActions } from "@formbricks/types/v1/sessions";
 import { Prisma } from "@prisma/client";
 import { cache } from "react";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
 
 const select = {
   id: true,
@@ -18,6 +20,7 @@ const select = {
 const oneHour = 1000 * 60 * 60;
 
 export const getSession = async (sessionId: string): Promise<TSession | null> => {
+  validateInputs([sessionId, ZId]);
   try {
     const session = await prisma.session.findUnique({
       where: {
@@ -39,6 +42,7 @@ export const getSession = async (sessionId: string): Promise<TSession | null> =>
 export const getSessionWithActionsOfPerson = async (
   personId: string
 ): Promise<TSessionWithActions[] | null> => {
+  validateInputs([personId, ZId]);
   try {
     const sessionsWithActionsForPerson = await prisma.session.findMany({
       where: {
@@ -73,6 +77,7 @@ export const getSessionWithActionsOfPerson = async (
 };
 
 export const getSessionCount = cache(async (personId: string): Promise<number> => {
+  validateInputs([personId, ZId]);
   try {
     const sessionCount = await prisma.session.count({
       where: {
@@ -89,6 +94,7 @@ export const getSessionCount = cache(async (personId: string): Promise<number> =
 });
 
 export const createSession = async (personId: string): Promise<TSession> => {
+  validateInputs([personId, ZId]);
   try {
     const session = await prisma.session.create({
       data: {
@@ -113,6 +119,7 @@ export const createSession = async (personId: string): Promise<TSession> => {
 };
 
 export const extendSession = async (sessionId: string): Promise<TSession> => {
+  validateInputs([sessionId, ZId]);
   try {
     const session = await prisma.session.update({
       where: {
diff --git a/packages/lib/services/survey.ts b/packages/lib/services/survey.ts
index d383b15d64..d2c820252e 100644
--- a/packages/lib/services/survey.ts
+++ b/packages/lib/services/survey.ts
@@ -6,6 +6,8 @@ import { cache } from "react";
 import "server-only";
 import { z } from "zod";
 import { captureTelemetry } from "../telemetry";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
 
 export const selectSurvey = {
   id: true,
@@ -68,11 +70,13 @@ export const selectSurveyWithAnalytics = {
 };
 
 export const preloadSurveyWithAnalytics = (surveyId: string) => {
+  validateInputs([surveyId, ZId]);
   void getSurveyWithAnalytics(surveyId);
 };
 
 export const getSurveyWithAnalytics = cache(
   async (surveyId: string): Promise<TSurveyWithAnalytics | null> => {
+    validateInputs([surveyId, ZId]);
     let surveyPrisma;
     try {
       surveyPrisma = await prisma.survey.findUnique({
@@ -125,6 +129,7 @@ export const getSurveyWithAnalytics = cache(
 );
 
 export const getSurvey = cache(async (surveyId: string): Promise<TSurvey | null> => {
+  validateInputs([surveyId, ZId]);
   let surveyPrisma;
   try {
     surveyPrisma = await prisma.survey.findUnique({
@@ -162,6 +167,7 @@ export const getSurvey = cache(async (surveyId: string): Promise<TSurvey | null>
 });
 
 export const getSurveys = cache(async (environmentId: string): Promise<TSurvey[]> => {
+  validateInputs([environmentId, ZId]);
   let surveysPrisma;
   try {
     surveysPrisma = await prisma.survey.findMany({
@@ -200,6 +206,7 @@ export const getSurveys = cache(async (environmentId: string): Promise<TSurvey[]
 
 export const getSurveysWithAnalytics = cache(
   async (environmentId: string): Promise<TSurveyWithAnalytics[]> => {
+    validateInputs([environmentId, ZId]);
     let surveysPrisma;
     try {
       surveysPrisma = await prisma.survey.findMany({
@@ -246,6 +253,7 @@ export const getSurveysWithAnalytics = cache(
 );
 
 export async function deleteSurvey(surveyId: string) {
+  validateInputs([surveyId, ZId]);
   const deletedSurvey = await prisma.survey.delete({
     where: {
       id: surveyId,
@@ -256,6 +264,7 @@ export async function deleteSurvey(surveyId: string) {
 }
 
 export async function createSurvey(environmentId: string, surveyBody: any) {
+  validateInputs([environmentId, ZId]);
   const survey = await prisma.survey.create({
     data: {
       ...surveyBody,
diff --git a/packages/lib/services/team.ts b/packages/lib/services/team.ts
index 018d05b6ca..0b40430417 100644
--- a/packages/lib/services/team.ts
+++ b/packages/lib/services/team.ts
@@ -22,6 +22,8 @@ import {
   populateEnvironment,
   updateEnvironmentArgs,
 } from "../utils/createDemoProductHelpers";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
 
 export const select = {
   id: true,
@@ -56,6 +58,7 @@ export const getTeamsByUserId = cache(async (userId: string): Promise<TTeam[]> =
 });
 
 export const getTeamByEnvironmentId = cache(async (environmentId: string): Promise<TTeam | null> => {
+  validateInputs([environmentId, ZId]);
   try {
     const team = await prisma.team.findFirst({
       where: {
@@ -83,6 +86,7 @@ export const getTeamByEnvironmentId = cache(async (environmentId: string): Promi
 });
 
 export const deleteTeam = async (teamId: string) => {
+  validateInputs([teamId, ZId]);
   try {
     await prisma.team.delete({
       where: {
@@ -99,6 +103,7 @@ export const deleteTeam = async (teamId: string) => {
 };
 
 export const createDemoProduct = cache(async (teamId: string) => {
+  validateInputs([teamId, ZId]);
   const productWithEnvironment = Prisma.validator<Prisma.ProductArgs>()({
     include: {
       environments: true,
diff --git a/packages/lib/services/teamDetails.ts b/packages/lib/services/teamDetails.ts
index 61ba690e65..02dcb90832 100644
--- a/packages/lib/services/teamDetails.ts
+++ b/packages/lib/services/teamDetails.ts
@@ -1,8 +1,11 @@
 import { prisma } from "@formbricks/database";
 import { Prisma } from "@prisma/client";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
 import { DatabaseError, ResourceNotFoundError } from "@formbricks/types/v1/errors";
 
 export const getTeamDetails = async (environmentId: string) => {
+  validateInputs([environmentId, ZId]);
   try {
     const environment = await prisma.environment.findUnique({
       where: {
diff --git a/packages/lib/services/webhook.ts b/packages/lib/services/webhook.ts
index aa7bb4138e..c4b3884df4 100644
--- a/packages/lib/services/webhook.ts
+++ b/packages/lib/services/webhook.ts
@@ -1,12 +1,16 @@
 "use server";
 import "server-only";
 
-import { TWebhook, TWebhookInput } from "@formbricks/types/v1/webhooks";
+import { TWebhook, TWebhookInput, ZWebhookInput } from "@formbricks/types/v1/webhooks";
 import { prisma } from "@formbricks/database";
 import { Prisma } from "@prisma/client";
+import { validateInputs } from "../utils/validate";
+import { ZId } from "@formbricks/types/v1/environment";
+import { cache } from "react";
 import { ResourceNotFoundError, DatabaseError, InvalidInputError } from "@formbricks/types/v1/errors";
 
-export const getWebhooks = async (environmentId: string): Promise<TWebhook[]> => {
+export const getWebhooks = cache(async (environmentId: string): Promise<TWebhook[]> => {
+  validateInputs([environmentId, ZId]);
   try {
     return await prisma.webhook.findMany({
       where: {
@@ -16,9 +20,10 @@ export const getWebhooks = async (environmentId: string): Promise<TWebhook[]> =>
   } catch (error) {
     throw new DatabaseError(`Database error when fetching webhooks for environment ${environmentId}`);
   }
-};
+});
 
 export const getWebhook = async (id: string): Promise<TWebhook | null> => {
+  validateInputs([id, ZId]);
   const webhook = await prisma.webhook.findUnique({
     where: {
       id,
@@ -31,6 +36,7 @@ export const createWebhook = async (
   environmentId: string,
   webhookInput: TWebhookInput
 ): Promise<TWebhook> => {
+  validateInputs([environmentId, ZId], [webhookInput, ZWebhookInput]);
   try {
     if (!webhookInput.url || !webhookInput.triggers) {
       throw new InvalidInputError("Missing URL or trigger in webhook input");
@@ -61,6 +67,7 @@ export const updateWebhook = async (
   webhookId: string,
   webhookInput: Partial<TWebhookInput>
 ): Promise<TWebhook> => {
+  validateInputs([environmentId, ZId], [webhookId, ZId], [webhookInput, ZWebhookInput]);
   try {
     const result = await prisma.webhook.update({
       where: {
@@ -82,6 +89,7 @@ export const updateWebhook = async (
 };
 
 export const deleteWebhook = async (id: string): Promise<TWebhook> => {
+  validateInputs([id, ZId]);
   try {
     return await prisma.webhook.delete({
       where: {
diff --git a/packages/lib/utils/validate.ts b/packages/lib/utils/validate.ts
new file mode 100644
index 0000000000..5db6547d68
--- /dev/null
+++ b/packages/lib/utils/validate.ts
@@ -0,0 +1,15 @@
+import z from "zod";
+import { ValidationError } from "@formbricks/types/v1/errors";
+
+type ValidationPair = [any, z.ZodSchema<any>];
+
+export const validateInputs = (...pairs: ValidationPair[]): void => {
+  for (const [value, schema] of pairs) {
+    const inputValidation = schema.safeParse(value);
+
+    if (!inputValidation.success) {
+      console.error(`Validation failed for ${schema}: ${inputValidation.error.message}`);
+      throw new ValidationError("Validation failed");
+    }
+  }
+};
diff --git a/packages/surveys/postcss.config.js b/packages/surveys/postcss.config.js
index 2e7af2b7f1..2aa7205d4b 100644
--- a/packages/surveys/postcss.config.js
+++ b/packages/surveys/postcss.config.js
@@ -3,4 +3,4 @@ export default {
     tailwindcss: {},
     autoprefixer: {},
   },
-}
+};
diff --git a/packages/types/v1/attributeClasses.ts b/packages/types/v1/attributeClasses.ts
index 7e60b14656..b2c8ebfa60 100644
--- a/packages/types/v1/attributeClasses.ts
+++ b/packages/types/v1/attributeClasses.ts
@@ -11,4 +11,10 @@ export const ZAttributeClass = z.object({
   archived: z.boolean(),
 });
 
+export const ZAttributeClassUpdateInput = z.object({
+  description: z.string(),
+  archived: z.boolean(),
+});
+export type TAttributeClassUpdateInput = z.infer<typeof ZAttributeClassUpdateInput>;
+
 export type TAttributeClass = z.infer<typeof ZAttributeClass>;
diff --git a/packages/types/v1/environment.ts b/packages/types/v1/environment.ts
index 8629d6b500..daac4519ee 100644
--- a/packages/types/v1/environment.ts
+++ b/packages/types/v1/environment.ts
@@ -17,4 +17,6 @@ export const ZEnvironmentUpdateInput = z.object({
   widgetSetupCompleted: z.boolean(),
 });
 
+export const ZId = z.string().cuid2();
+
 export type TEnvironmentUpdateInput = z.infer<typeof ZEnvironmentUpdateInput>;
diff --git a/packages/types/v1/membership.ts b/packages/types/v1/membership.ts
new file mode 100644
index 0000000000..f735046875
--- /dev/null
+++ b/packages/types/v1/membership.ts
@@ -0,0 +1,11 @@
+import { z } from "zod";
+
+export const ZMembershipRole = z.enum(["owner", "admin", "editor", "developer", "viewer"]);
+
+export const ZMembership = z.object({
+  role: ZMembershipRole,
+  userId: z.string(),
+});
+
+export type TMembership = z.infer<typeof ZMembership>;
+export type TMembershipRole = z.infer<typeof ZMembershipRole>;