diff --git a/packages/objectloader2/src/core/objectLoader2Factory.ts b/packages/objectloader2/src/core/objectLoader2Factory.ts
index 0e0d887ca..8dc845a27 100644
--- a/packages/objectloader2/src/core/objectLoader2Factory.ts
+++ b/packages/objectloader2/src/core/objectLoader2Factory.ts
@@ -1,5 +1,5 @@
 import { CustomLogger, getFeatureFlag, ObjectLoader2Flags } from '../types/functions.js'
-import { Base } from '../types/types.js'
+import { Base, ObjectAttributeMask } from '../types/types.js'
 import { ObjectLoader2 } from './objectLoader2.js'
 import { IndexedDatabase } from './stages/indexedDatabase.js'
 import { MemoryDatabase } from './stages/memory/memoryDatabase.js'
@@ -40,6 +40,7 @@ export class ObjectLoader2Factory {
     token?: string
     headers?: Headers
     options?: ObjectLoader2FactoryOptions
+    attributeMask: ObjectAttributeMask
   }): ObjectLoader2 {
     const log = ObjectLoader2Factory.getLogger(params.options?.logger)
     let database
@@ -67,6 +68,7 @@ export class ObjectLoader2Factory {
         objectId: params.objectId,
         token: params.token,
         headers: params.headers,
+        attributeMask: params.attributeMask,
         logger: log || ((): void => {})
       }),
       database,
diff --git a/packages/objectloader2/src/core/stages/serverDownloader.ts b/packages/objectloader2/src/core/stages/serverDownloader.ts
index b7216f3cc..b1b38f01b 100644
--- a/packages/objectloader2/src/core/stages/serverDownloader.ts
+++ b/packages/objectloader2/src/core/stages/serverDownloader.ts
@@ -2,7 +2,7 @@ import BatchingQueue from '../../queues/batchingQueue.js'
 import Queue from '../../queues/queue.js'
 import { ObjectLoaderRuntimeError } from '../../types/errors.js'
 import { CustomLogger, Fetcher, indexOf, isBase, take } from '../../types/functions.js'
-import { Item } from '../../types/types.js'
+import { Item, ObjectAttributeMask } from '../../types/types.js'
 import { Downloader } from '../interfaces.js'
 
 export interface ServerDownloaderOptions {
@@ -13,6 +13,7 @@ export interface ServerDownloaderOptions {
   headers?: Headers
   logger: CustomLogger
   fetch?: Fetcher
+  attributeMask: ObjectAttributeMask
 }
 
 const MAX_SAFARI_DECODE_BYTES = 2 * 1024 * 1024 * 1024 - 1024 * 1024 // 2GB minus a margin
@@ -118,11 +119,12 @@ Chrome's behavior: Chrome generally handles larger data sizes without this speci
 
     const start = performance.now()
     this.#logger(`Downloading batch of ${batch.length} items...`)
+    const attributeMask = this.#options.attributeMask
     const keys = new Set<string>(batch)
     const response = await this.#fetch(url, {
       method: 'POST',
       headers: { ...headers, 'Content-Type': 'application/json' },
-      body: JSON.stringify({ objectIds: batch })
+      body: JSON.stringify({ objectIds: batch, attributeMask })
     })
 
     this.#validateResponse(response)
diff --git a/packages/objectloader2/src/types/types.ts b/packages/objectloader2/src/types/types.ts
index a482b89f0..2b26ab29a 100644
--- a/packages/objectloader2/src/types/types.ts
+++ b/packages/objectloader2/src/types/types.ts
@@ -19,3 +19,5 @@ export interface Reference {
 export interface DataChunk extends Base {
   data?: Base[]
 }
+
+export type ObjectAttributeMask = { include: string[] } | { exclude: string[] }