diff --git a/backend/src/list/dto/add-to-list.dto.ts b/backend/src/list/dto/add-to-list.dto.ts
new file mode 100644
index 0000000..1af961d
--- /dev/null
+++ b/backend/src/list/dto/add-to-list.dto.ts
@@ -0,0 +1,11 @@
+import { IsEnum, IsInt, Min } from 'class-validator';
+import { ListStatus } from '../user-work.entity';
+
+export class AddToListDto {
+  @IsInt()
+  @Min(1)
+  anilistId: number;
+
+  @IsEnum(ListStatus)
+  status: ListStatus;
+}
diff --git a/backend/src/list/dto/dto-validation.spec.ts b/backend/src/list/dto/dto-validation.spec.ts
new file mode 100644
index 0000000..886e12e
--- /dev/null
+++ b/backend/src/list/dto/dto-validation.spec.ts
@@ -0,0 +1,168 @@
+import { validate } from 'class-validator';
+import { plainToInstance } from 'class-transformer';
+import { AddToListDto } from './add-to-list.dto';
+import { UpdateProgressDto } from './update-progress.dto';
+import { UpdateStatusDto } from './update-status.dto';
+import { SetScoreDto } from './set-score.dto';
+import { ListStatus } from '../user-work.entity';
+
+// Helper: transform plain object to class instance and validate
+async function check<T extends object>(
+  cls: new () => T,
+  plain: Record<string, any>,
+): Promise<string[]> {
+  const instance = plainToInstance(cls, plain);
+  const errors = await validate(instance);
+  return errors.flatMap((e) => Object.values(e.constraints ?? {}));
+}
+
+// ─── AddToListDto ─────────────────────────────────────────────
+
+describe('AddToListDto', () => {
+  it('should accept valid input', async () => {
+    const errors = await check(AddToListDto, {
+      anilistId: 12345,
+      status: ListStatus.WATCHING,
+    });
+    expect(errors).toHaveLength(0);
+  });
+
+  it('should reject missing anilistId', async () => {
+    const errors = await check(AddToListDto, {
+      status: ListStatus.WATCHING,
+    });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject non-integer anilistId', async () => {
+    const errors = await check(AddToListDto, {
+      anilistId: 'abc',
+      status: ListStatus.WATCHING,
+    });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject anilistId < 1', async () => {
+    const errors = await check(AddToListDto, {
+      anilistId: 0,
+      status: ListStatus.WATCHING,
+    });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject missing status', async () => {
+    const errors = await check(AddToListDto, {
+      anilistId: 12345,
+    });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject invalid status', async () => {
+    const errors = await check(AddToListDto, {
+      anilistId: 12345,
+      status: 'binge_watching',
+    });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should accept all valid ListStatus values', async () => {
+    for (const status of Object.values(ListStatus)) {
+      const errors = await check(AddToListDto, { anilistId: 1, status });
+      expect(errors).toHaveLength(0);
+    }
+  });
+});
+
+// ─── UpdateProgressDto ───────────────────────────────────────
+
+describe('UpdateProgressDto', () => {
+  it('should accept valid progress', async () => {
+    const errors = await check(UpdateProgressDto, { progress: 5 });
+    expect(errors).toHaveLength(0);
+  });
+
+  it('should accept progress = 0', async () => {
+    const errors = await check(UpdateProgressDto, { progress: 0 });
+    expect(errors).toHaveLength(0);
+  });
+
+  it('should reject negative progress', async () => {
+    const errors = await check(UpdateProgressDto, { progress: -1 });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject non-integer progress', async () => {
+    const errors = await check(UpdateProgressDto, { progress: 3.5 });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject missing progress', async () => {
+    const errors = await check(UpdateProgressDto, {});
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject string progress', async () => {
+    const errors = await check(UpdateProgressDto, { progress: 'five' });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+});
+
+// ─── UpdateStatusDto ─────────────────────────────────────────
+
+describe('UpdateStatusDto', () => {
+  it('should accept valid status', async () => {
+    const errors = await check(UpdateStatusDto, {
+      status: ListStatus.COMPLETED,
+    });
+    expect(errors).toHaveLength(0);
+  });
+
+  it('should reject missing status', async () => {
+    const errors = await check(UpdateStatusDto, {});
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject invalid status string', async () => {
+    const errors = await check(UpdateStatusDto, { status: 'finished' });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+});
+
+// ─── SetScoreDto ─────────────────────────────────────────────
+
+describe('SetScoreDto', () => {
+  it('should accept valid score', async () => {
+    const errors = await check(SetScoreDto, { score: 8.5 });
+    expect(errors).toHaveLength(0);
+  });
+
+  it('should accept score = 0', async () => {
+    const errors = await check(SetScoreDto, { score: 0 });
+    expect(errors).toHaveLength(0);
+  });
+
+  it('should accept score = 10', async () => {
+    const errors = await check(SetScoreDto, { score: 10 });
+    expect(errors).toHaveLength(0);
+  });
+
+  it('should reject score > 10', async () => {
+    const errors = await check(SetScoreDto, { score: 11 });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject negative score', async () => {
+    const errors = await check(SetScoreDto, { score: -1 });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject missing score', async () => {
+    const errors = await check(SetScoreDto, {});
+    expect(errors.length).toBeGreaterThan(0);
+  });
+
+  it('should reject string score', async () => {
+    const errors = await check(SetScoreDto, { score: 'great' });
+    expect(errors.length).toBeGreaterThan(0);
+  });
+});
diff --git a/backend/src/list/dto/set-score.dto.ts b/backend/src/list/dto/set-score.dto.ts
new file mode 100644
index 0000000..12734d2
--- /dev/null
+++ b/backend/src/list/dto/set-score.dto.ts
@@ -0,0 +1,8 @@
+import { IsNumber, Min, Max } from 'class-validator';
+
+export class SetScoreDto {
+  @IsNumber()
+  @Min(0)
+  @Max(10)
+  score: number;
+}
diff --git a/backend/src/list/dto/update-progress.dto.ts b/backend/src/list/dto/update-progress.dto.ts
new file mode 100644
index 0000000..9ac3218
--- /dev/null
+++ b/backend/src/list/dto/update-progress.dto.ts
@@ -0,0 +1,7 @@
+import { IsInt, Min } from 'class-validator';
+
+export class UpdateProgressDto {
+  @IsInt()
+  @Min(0)
+  progress: number;
+}
diff --git a/backend/src/list/dto/update-status.dto.ts b/backend/src/list/dto/update-status.dto.ts
new file mode 100644
index 0000000..2ab00b3
--- /dev/null
+++ b/backend/src/list/dto/update-status.dto.ts
@@ -0,0 +1,7 @@
+import { IsEnum } from 'class-validator';
+import { ListStatus } from '../user-work.entity';
+
+export class UpdateStatusDto {
+  @IsEnum(ListStatus)
+  status: ListStatus;
+}
diff --git a/backend/src/list/list.controller.ts b/backend/src/list/list.controller.ts
index 39a6182..7d9846f 100644
--- a/backend/src/list/list.controller.ts
+++ b/backend/src/list/list.controller.ts
@@ -15,6 +15,10 @@ import { ListService } from './list.service';
 import { ListStatus } from './user-work.entity';
 import { AuthGuard } from '../auth/auth.guard';
 import { UserService } from '../user/user.service';
+import { AddToListDto } from './dto/add-to-list.dto';
+import { UpdateProgressDto } from './dto/update-progress.dto';
+import { UpdateStatusDto } from './dto/update-status.dto';
+import { SetScoreDto } from './dto/set-score.dto';
 
 @Controller('api/list')
 @UseGuards(AuthGuard)
@@ -37,7 +41,7 @@ export class ListController {
   @Post()
   async addToList(
     @Req() req: any,
-    @Body() body: { anilistId: number; status: ListStatus },
+    @Body() body: AddToListDto,
   ) {
     const user = await this.userService.findOrCreate({
       id: req.user.id,
@@ -51,7 +55,7 @@ export class ListController {
   async updateProgress(
     @Req() req: any,
     @Param('id', ParseIntPipe) id: number,
-    @Body() body: { progress: number },
+    @Body() body: UpdateProgressDto,
   ) {
     const user = await this.userService.findOrCreate({
       id: req.user.id,
@@ -65,7 +69,7 @@ export class ListController {
   async updateStatus(
     @Req() req: any,
     @Param('id', ParseIntPipe) id: number,
-    @Body() body: { status: ListStatus },
+    @Body() body: UpdateStatusDto,
   ) {
     const user = await this.userService.findOrCreate({
       id: req.user.id,
@@ -79,7 +83,7 @@ export class ListController {
   async setScore(
     @Req() req: any,
     @Param('id', ParseIntPipe) id: number,
-    @Body() body: { score: number },
+    @Body() body: SetScoreDto,
   ) {
     const user = await this.userService.findOrCreate({
       id: req.user.id,