diff --git a/packages/backend/src/server/api/endpoints/ap/get.ts b/packages/backend/src/server/api/endpoints/ap/get.ts
index 3fe5c60a44..06dd37a140 100644
--- a/packages/backend/src/server/api/endpoints/ap/get.ts
+++ b/packages/backend/src/server/api/endpoints/ap/get.ts
@@ -35,6 +35,7 @@ export const paramDef = {
 	properties: {
 		uri: { type: 'string' },
 		expandCollectionItems: { type: 'boolean' },
+		expandCollectionLimit: { type: 'integer', nullable: true },
 		allowAnonymous: { type: 'boolean' },
 	},
 	required: ['uri'],
@@ -50,7 +51,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			const object = await resolver.resolve(ps.uri, ps.allowAnonymous ?? false);
 
 			if (ps.expandCollectionItems && isCollectionOrOrderedCollection(object)) {
-				const items = await resolver.resolveCollectionItems(object, undefined, ps.allowAnonymous ?? false);
+				const items = await resolver.resolveCollectionItems(object, ps.expandCollectionLimit, ps.allowAnonymous ?? false);
 
 				if (isOrderedCollection(object) || isOrderedCollectionPage(object)) {
 					object.orderedItems = items;
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 678e980892..5e5f4f5db5 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -12919,6 +12919,7 @@ export type operations = {
         'application/json': {
           uri: string;
           expandCollectionItems?: boolean;
+          expandCollectionLimit?: number | null;
           allowAnonymous?: boolean;
         };
       };