--- title: "Overview" url: https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/overview/ description: "This page describes the web SDK method to perform operations in Stratus." last_updated: 2026-09-08T11:07:33Z service: Cloud Scale type: general related_links: - name: "Stratus Component Help Documentation" url: /en/cloud-scale/help/stratus/introduction - name: "Java SDK" url: /en/sdk/java/v1/cloud-scale/stratus/overview/ - name: "JavaScript SDK Documentation" url: /en/sdk/javascript/v1/cloudscale/stratus/overview/ - name: "Python SDK" url: /en/sdk/python/v1/cloud-scale/stratus/overview/ - name: "iOS SDK" url: /en/sdk/ios/v2/cloud-scale/stratus/overview/ - name: "Android SDK" url: /en/sdk/android/v2/cloud-scale/stratus/overview/ - name: "Flutter SDK" url: /en/sdk/flutter/v2/cloud-scale/stratus/overview/ - name: "REST API" url: /en/api/code-reference/cloud-scale/stratus/get-all-buckets/#GetAllBuckets --- # Overview > **Note:** This SDK is currently in deprecation. Migrate to [JavaScript SDK](https://docs.catalyst.zoho.com/en/sdk/javascript/v1/cloudscale/stratus/rename-move/) now. Cloud Scale [Stratus](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/introduction) is Catalyst's robust and powerful storage solution. You can store data of any format in the form of [Objects](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/objects/introduction/) in containers called [Buckets](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/buckets/name-bucket/). Each Bucket and every individual object in the bucket has a secure [Object URL](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/objects/introduction/#object-url) and [Bucket URL](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/buckets/create-bucket/#bucket-url). You can perform upload and download operations on objects and even provide [custom permissions](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/stratus-permissions/#custom-permissions) for each object. > **Note:** * It is advised you [enable CORS](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/stratus-config/bucket-cors/) to whitelist your required application or AppSail service domain and use the following SDKs. * To use the Stratus SDK methods, you need to ensure you upgrade your **Web SDK** to [`v4.6.2`](https://static.zohocdn.com/catalyst/sdk/js/4.6.2/catalystWebSDK.js). * You also need to upgrade the [Catalyst CLI](https://docs.catalyst.zoho.com/en/cli/v1/cli-command-reference/) to `v1.18.0-beta.5` The following table contains the list of all the Catalyst SDKs that can be used to perform Stratus operations through code.
Category SDK Method
General Stratus Operations
  • [Create Stratus Instance](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/initialize-stratus-instance/)
    • [Initialize Bucket Instance](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/initialize-stratus-instance/#initialize-bucket-instance)
Bucket Operations
  • [Check Object Availability](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/check-object/)
    • [Check Object Availability Without VersionID](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/check-object/#check-object-availability-without-versionid)
    • [Check Object Availability With VersionID](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/check-object/#check-object-availability-with-versionid)
  • [Download Object](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/)
    • [Download Object Using Object Name](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/#download-object-using-object-name)
    • [Download a Particular Version of the Object](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/#download-a-particular-version-of-the-object)
    • [Download Object With Process Callback](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/#download-object-with-process-callback)
    • [Download a Particular Part of the Object](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/#download-a-particular-part-of-the-object)
    • [Download Object Using a Signed URL](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/#download-object-using-a-signed-url)
      • [Using Asynchronous Functions](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/#using-asynchronous-functions)
      • [Using Promises](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/#using-promises)
      • [Using SignedURL with Options](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/#using-signedurl-with-options)
    • [Download a Cached Object Using Cached URL](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/download-object/#download-a-cached-object-using-cached-url)
  • [Upload Object](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/upload-object/)
    • [Upload Object as File](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/upload-object/#upload-object-as-file)
    • [Upload Object as String](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/upload-object/#upload-object-as-string)
    • [Upload Object With Options](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/upload-object/#upload-object-with-options)
    • [Upload Object With Process Callback](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/upload-object/#upload-object-with-process-callback)
    • [Upload Object With Its Meta Details](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/upload-object/#upload-object-with-its-meta-details)
    • [Mutlipart Upload](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/upload-object/#mutlipart-upload)
    • [Upload an Object Wrapping all the Multipart Functionality](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/upload-object/#upload-an-object-wrapping-all-the-multipart-functionality)
  • [Delete Object](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/delete-object/)
    • [Delete Object With Object Name](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/delete-object/#delete-object-with-object-name)
    • [Delete Object With Object Name and VersionID](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/delete-object/#delete-object-with-object-name-and-versionid)