diff --git a/src/notes/alias-create.dto.ts b/src/notes/alias-create.dto.ts
new file mode 100644
index 000000000..2da4dd841
--- /dev/null
+++ b/src/notes/alias-create.dto.ts
@@ -0,0 +1,23 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString } from 'class-validator';
+
+export class AliasCreateDto {
+  /**
+   * The note id or alias, which identifies the note the alias should be added to
+   */
+  @IsString()
+  @ApiProperty()
+  noteIdOrAlias: string;
+
+  /**
+   * The new alias
+   */
+  @IsString()
+  @ApiProperty()
+  newAlias: string;
+}
diff --git a/src/notes/alias-update.dto.ts b/src/notes/alias-update.dto.ts
new file mode 100644
index 000000000..318c86680
--- /dev/null
+++ b/src/notes/alias-update.dto.ts
@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { ApiProperty } from '@nestjs/swagger';
+import { IsBoolean } from 'class-validator';
+
+export class AliasUpdateDto {
+  /**
+   * Whether the alias should become the primary alias or not
+   */
+  @IsBoolean()
+  @ApiProperty()
+  primaryAlias: boolean;
+}
diff --git a/src/notes/alias.dto.ts b/src/notes/alias.dto.ts
new file mode 100644
index 000000000..dccaddc23
--- /dev/null
+++ b/src/notes/alias.dto.ts
@@ -0,0 +1,30 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+import { ApiProperty } from '@nestjs/swagger';
+import { IsBoolean, IsString } from 'class-validator';
+
+export class AliasDto {
+  /**
+   * The name of the alias
+   */
+  @IsString()
+  @ApiProperty()
+  name: string;
+
+  /**
+   * Is the alias the primary alias or not
+   */
+  @IsBoolean()
+  @ApiProperty()
+  primaryAlias: boolean;
+
+  /**
+   * The public id of the note the alias is associated with
+   */
+  @IsString()
+  @ApiProperty()
+  noteId: string;
+}