diff --git a/src/constants/public-endpoint-cache.constants.ts b/src/constants/public-endpoint-cache.constants.ts
new file mode 100644
index 0000000..b7fd969
--- /dev/null
+++ b/src/constants/public-endpoint-cache.constants.ts
@@ -0,0 +1,26 @@
+/**
+ * Public endpoint cache settings.
+ *
+ * Keep this file limited to lightweight, reusable constants (no runtime logic).
+ */
+export const PUBLIC_ENDPOINT_CACHE_SECONDS = {
+   short: 300,
+   medium: 3600,
+   long: 86400,
+} as const;
+
+export const PUBLIC_ENDPOINT_CACHE_PRESETS = {
+   short: {
+      maxAge: PUBLIC_ENDPOINT_CACHE_SECONDS.short,
+      type: 'public' as const,
+   },
+   medium: {
+      maxAge: PUBLIC_ENDPOINT_CACHE_SECONDS.medium,
+      type: 'public' as const,
+   },
+   long: {
+      maxAge: PUBLIC_ENDPOINT_CACHE_SECONDS.long,
+      type: 'public' as const,
+   },
+} as const;
+
diff --git a/src/middlewares/cache-control.middleware.ts b/src/middlewares/cache-control.middleware.ts
index f4a63a7..350ac57 100644
--- a/src/middlewares/cache-control.middleware.ts
+++ b/src/middlewares/cache-control.middleware.ts
@@ -1,5 +1,6 @@
 // src/middlewares/cache-control.middleware.ts
 import { Request, Response, NextFunction } from 'express';
+import { PUBLIC_ENDPOINT_CACHE_PRESETS } from '../constants/public-endpoint-cache.constants';
 
 /**
  * Cache control options for different types of endpoints.
@@ -90,17 +91,17 @@ export const CachePresets = {
    /**
     * Short cache for frequently updated public data (5 minutes)
     */
-   publicShort: { maxAge: 300, type: 'public' as const },
+   publicShort: PUBLIC_ENDPOINT_CACHE_PRESETS.short,
 
    /**
     * Medium cache for moderately stable public data (1 hour)
     */
-   publicMedium: { maxAge: 3600, type: 'public' as const },
+   publicMedium: PUBLIC_ENDPOINT_CACHE_PRESETS.medium,
 
    /**
     * Long cache for stable public data (24 hours)
     */
-   publicLong: { maxAge: 86400, type: 'public' as const },
+   publicLong: PUBLIC_ENDPOINT_CACHE_PRESETS.long,
 
    /**
     * Private cache for user-specific data (5 minutes)
diff --git a/src/modules/creator/creator.controller.ts b/src/modules/creator/creator.controller.ts
index 0c61542..2f5d4f5 100644
--- a/src/modules/creator/creator.controller.ts
+++ b/src/modules/creator/creator.controller.ts
@@ -1,6 +1,5 @@
 // src/modules/creator/creator.controller.ts
 import { Request, Response } from 'express';
-import { ZodError } from 'zod';
 import { z } from 'zod';
 import {
    sendPaginatedSuccess,
@@ -11,6 +10,7 @@ import {
 import { getPaginatedCreators } from './creator.service';
 import { parseCreatorSortOptions } from './creator.utils';
 import { safeIntParam } from '../../utils/query.utils';
+import { parsePublicQuery } from '../../utils/public-query-parse.utils';
 import {
    DEFAULT_PAGE,
    DEFAULT_PAGE_SIZE,
@@ -37,7 +37,11 @@ const LegacyCreatorQuerySchema = z.object({
 
 export async function listCreators(req: Request, res: Response) {
    try {
-      const { page, limit, sortBy, sortOrder } = LegacyCreatorQuerySchema.parse(req.query);
+      const parsed = parsePublicQuery(LegacyCreatorQuerySchema, req.query);
+      if (!parsed.ok) {
+         return sendValidationError(res, 'Invalid query parameters', parsed.details);
+      }
+      const { page, limit, sortBy, sortOrder } = parsed.data;
 
       const sort = parseCreatorSortOptions(sortBy, sortOrder);
 
@@ -55,13 +59,6 @@ export async function listCreators(req: Request, res: Response) {
          'Creators retrieved successfully'
       );
    } catch (error) {
-      if (error instanceof ZodError) {
-         const details = error.errors.map(err => ({
-            field: err.path.join('.'),
-            message: err.message,
-         }));
-         return sendValidationError(res, 'Invalid query parameters', details);
-      }
       console.error('Error listing creators:', error);
       return sendError(
          res,
diff --git a/src/modules/creators/creators.controllers.ts b/src/modules/creators/creators.controllers.ts
index c32e363..5c28101 100644
--- a/src/modules/creators/creators.controllers.ts
+++ b/src/modules/creators/creators.controllers.ts
@@ -10,7 +10,7 @@ import {
    sendSuccess,
    sendValidationError,
 } from '../../utils/api-response.utils';
-import { ZodError } from 'zod';
+import { parsePublicQuery } from '../../utils/public-query-parse.utils';
 
 /**
  * Controller for GET /api/v1/creators
@@ -21,7 +21,11 @@ import { ZodError } from 'zod';
 export const httpListCreators: AsyncController = async (req, res, next) => {
    try {
       // Validate query parameters
-      const validatedQuery = CreatorListQuerySchema.parse(req.query);
+      const parsed = parsePublicQuery(CreatorListQuerySchema, req.query);
+      if (!parsed.ok) {
+         return sendValidationError(res, 'Invalid query parameters', parsed.details);
+      }
+      const validatedQuery = parsed.data;
 
       // Fetch creators and total count
       const [creators, total] = await fetchCreatorList(validatedQuery);
@@ -39,13 +43,6 @@ export const httpListCreators: AsyncController = async (req, res, next) => {
 
       sendSuccess(res, response);
    } catch (error) {
-      if (error instanceof ZodError) {
-         const details = error.errors.map(err => ({
-            field: err.path.join('.'),
-            message: err.message,
-         }));
-         return sendValidationError(res, 'Invalid query parameters', details);
-      }
       next(error);
    }
 };
diff --git a/src/modules/creators/creators.routes.ts b/src/modules/creators/creators.routes.ts
index 5be776d..aa248e7 100644
--- a/src/modules/creators/creators.routes.ts
+++ b/src/modules/creators/creators.routes.ts
@@ -1,9 +1,7 @@
 import { Router } from 'express';
 import { httpListCreators } from './creators.controllers';
-import {
-   cacheControl,
-   CachePresets,
-} from '../../middlewares/cache-control.middleware';
+import { cacheControl } from '../../middlewares/cache-control.middleware';
+import { PUBLIC_ENDPOINT_CACHE_PRESETS } from '../../constants/public-endpoint-cache.constants';
 
 const creatorsRouter = Router();
 
@@ -15,7 +13,7 @@ const creatorsRouter = Router();
  */
 creatorsRouter.get(
    '/',
-   cacheControl(CachePresets.publicShort),
+   cacheControl(PUBLIC_ENDPOINT_CACHE_PRESETS.short),
    httpListCreators
 );
 
diff --git a/src/utils/public-query-parse.utils.ts b/src/utils/public-query-parse.utils.ts
new file mode 100644
index 0000000..164689c
--- /dev/null
+++ b/src/utils/public-query-parse.utils.ts
@@ -0,0 +1,36 @@
+import { z, ZodError, ZodTypeAny } from 'zod';
+
+export type PublicQueryValidationDetail = {
+   field: string;
+   message: string;
+};
+
+export type PublicQueryParseResult<T> =
+   | { ok: true; data: T }
+   | { ok: false; details: PublicQueryValidationDetail[] };
+
+/**
+ * Parse and validate public endpoint query params with a predictable output shape.
+ *
+ * This helper is intentionally small and focused:
+ * - maps `ZodError` into `{ field, message }[]` for API validation responses
+ * - does not add runtime behavior beyond schema parsing and error shaping
+ */
+export function parsePublicQuery<S extends ZodTypeAny>(
+   schema: S,
+   rawQuery: unknown
+): PublicQueryParseResult<z.infer<S>> {
+   try {
+      return { ok: true, data: schema.parse(rawQuery) };
+   } catch (error) {
+      if (error instanceof ZodError) {
+         const details: PublicQueryValidationDetail[] = error.errors.map(err => ({
+            field: err.path.join('.'),
+            message: err.message,
+         }));
+         return { ok: false, details };
+      }
+      throw error;
+   }
+}
+