diff --git a/.changeset/migrate-rooms-leave-endpoint.md b/.changeset/migrate-rooms-leave-endpoint.md
new file mode 100644
index 0000000000000..4f9a6263a9a19
--- /dev/null
+++ b/.changeset/migrate-rooms-leave-endpoint.md
@@ -0,0 +1,6 @@
+---
+'@rocket.chat/meteor': minor
+'@rocket.chat/rest-typings': minor
+---
+
+Migrated rooms.leave endpoint to new OpenAPI pattern with AJV validation
diff --git a/apps/meteor/app/api/server/v1/rooms.ts b/apps/meteor/app/api/server/v1/rooms.ts
index 988e60002eef9..70875e47fedd9 100644
--- a/apps/meteor/app/api/server/v1/rooms.ts
+++ b/apps/meteor/app/api/server/v1/rooms.ts
@@ -390,23 +390,6 @@ API.v1.addRoute(
 	},
 );
 
-API.v1.addRoute(
-	'rooms.leave',
-	{ authRequired: true },
-	{
-		async post() {
-			const room = await findRoomByIdOrName({ params: this.bodyParams });
-			const user = await Users.findOneById(this.userId);
-			if (!user) {
-				return API.v1.failure('Invalid user');
-			}
-			await leaveRoomMethod(user, room._id);
-
-			return API.v1.success();
-		},
-	},
-);
-
 /*
 TO-DO: 8.0.0 should use the ajv validation
 which will change this endpoint's
@@ -935,6 +918,14 @@ type RoomsFavorite =
 			favorite: boolean;
 	  };
 
+type RoomsLeave =
+	| {
+			roomId: string;
+	  }
+	| {
+			roomName: string;
+	  };
+
 const isRoomGetRolesPropsSchema = {
 	type: 'object',
 	properties: {
@@ -967,7 +958,29 @@ const RoomsFavoriteSchema = {
 	],
 };
 
+const isRoomsLeavePropsSchema = {
+	anyOf: [
+		{
+			type: 'object',
+			properties: {
+				roomId: { type: 'string' },
+			},
+			required: ['roomId'],
+			additionalProperties: false,
+		},
+		{
+			type: 'object',
+			properties: {
+				roomName: { type: 'string' },
+			},
+			required: ['roomName'],
+			additionalProperties: false,
+		},
+	],
+};
+
 const isRoomsFavoriteProps = ajv.compile<RoomsFavorite>(RoomsFavoriteSchema);
+const isRoomsLeaveProps = ajv.compile<RoomsLeave>(isRoomsLeavePropsSchema);
 
 export const roomEndpoints = API.v1
 	.get(
@@ -1141,6 +1154,38 @@ export const roomEndpoints = API.v1
 
 			await toggleFavoriteMethod(this.userId, room._id, favorite);
 
+			return API.v1.success();
+		},
+	)
+	.post(
+		'rooms.leave',
+		{
+			authRequired: true,
+			body: isRoomsLeaveProps,
+			response: {
+				200: ajv.compile<void>({
+					type: 'object',
+					properties: {
+						success: { type: 'boolean', enum: [true] },
+					},
+					required: ['success'],
+					additionalProperties: false,
+				}),
+				400: validateBadRequestErrorResponse,
+				401: validateUnauthorizedErrorResponse,
+			},
+		},
+		async function action() {
+			const room = await findRoomByIdOrName({ params: this.bodyParams });
+
+			const user = await Users.findOneById(this.userId);
+
+			if (!user) {
+				return API.v1.failure('error-invalid-user');
+			}
+
+			await leaveRoomMethod(user, room._id);
+
 			return API.v1.success();
 		},
 	);
diff --git a/packages/rest-typings/src/v1/rooms.ts b/packages/rest-typings/src/v1/rooms.ts
index 18c4574f7bb23..be2314d65bd41 100644
--- a/packages/rest-typings/src/v1/rooms.ts
+++ b/packages/rest-typings/src/v1/rooms.ts
@@ -90,7 +90,6 @@ export const isRoomsAutocompleteAdminRoomsPayload = ajv.compile<RoomsAutocomplet
 
 type BaseRoomsProps = { roomId: string } | { roomName: string };
 type RoomsInfoProps = BaseRoomsProps;
-type RoomsLeaveProps = BaseRoomsProps;
 
 const RoomsInfoSchema = {
 	oneOf: [
@@ -822,10 +821,6 @@ export type RoomsEndpoints = {
 		};
 	};
 
-	'/v1/rooms.leave': {
-		POST: (params: RoomsLeaveProps) => void;
-	};
-
 	'/v1/rooms.getDiscussions': {
 		GET: (params: RoomsGetDiscussionsProps) => PaginatedResult<{
 			discussions: IRoom[];