diff --git a/packages/shared-types/index.ts b/packages/shared-types/index.ts
new file mode 100644
index 0000000..a2818b5
--- /dev/null
+++ b/packages/shared-types/index.ts
@@ -0,0 +1,103 @@
+export type Visibility = 'public' | 'link';
+
+export interface User {
+  id: string;
+  email: string;
+  name: string;
+  image: string | null;
+  emailVerified: boolean;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+export interface Save {
+  id: number;
+  name: string;
+  type: string;
+  description: string;
+  tags: string[];
+  visibility: Visibility;
+  shareUrl?: string;
+  userId: string;
+  url: string;
+  s3Key: string;
+  fileSize: number;
+  mimeType: string;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+export interface SaveListItem extends Omit<Save, 'userId' | 's3Key' | 'fileSize' | 'mimeType'> {}
+
+export interface ApiResponse<T> {
+  success: boolean;
+  data?: T;
+  error?: string;
+}
+
+export interface PaginatedResponse<T> {
+  items: T[];
+  total: number;
+  page: number;
+  limit: number;
+}
+
+export interface SignUpResponse {
+  token: string | null;
+  user: User;
+}
+
+export interface SignInResponse {
+  redirect: boolean;
+  token: string;
+  url: null;
+  user: User;
+}
+
+export interface SignOutResponse {
+  success: boolean;
+}
+
+export interface SaveResponse {
+  id: number;
+  name: string;
+  type: string;
+  url: string;
+  visibility: Visibility;
+  shareUrl?: string;
+  createdAt: string;
+}
+
+export interface SaveDetailResponse extends Save {}
+
+export interface SaveUpdateResponse {
+  id: number;
+  name: string;
+  type: string;
+  description: string;
+  tags: string[];
+  visibility: Visibility;
+  shareUrl?: string;
+  updatedAt: string;
+}
+
+export interface DeleteSaveResponse {
+  success: boolean;
+  message: string;
+}
+
+export interface CreateSaveFromUrlRequest {
+  url: string;
+  name?: string;
+  description?: string;
+  tags?: string[];
+  visibility?: Visibility;
+}
+
+export interface UpdateSaveRequest {
+  name?: string;
+  description?: string;
+  tags?: string[];
+  visibility?: Visibility;
+}
+
diff --git a/packages/shared-types/package.json b/packages/shared-types/package.json
new file mode 100644
index 0000000..ace87ee
--- /dev/null
+++ b/packages/shared-types/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "@p1ctos4ve/shared-types",
+  "version": "1.0.0",
+  "main": "./index.ts",
+  "types": "./index.ts",
+  "exports": {
+    ".": "./index.ts"
+  }
+}