---
title: "Check Object Availability"
url: https://docs.catalyst.zoho.com/en/api/code-reference/cloud-scale/stratus/head-object/
description: "This API enables you to check if a particular object is present in a bucket."
last_updated: 2026-08-28T06:26:16Z
service: Cloud Scale
type: api
---

# Check Object Availability

### Description

This API allows you to check if a particular [object](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/objects/introduction/) is stored in a bucket. The Bucket is referred by its [unique bucket name](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/buckets/name-bucket/#ideal-practices-to-name-a-bucket), and the required object is referred using its name.

If [Versioning](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/stratus-config/general-settings/#versioning) is enabled, then the required object can also be referred to using its unique `version ID`.

### Request Details

#### Request URL

`HEAD` {api-domain}/baas/v1/project/{project_id}/bucket/objects

- **project_id** (Numerical): The [unique ID](https://docs.catalyst.zoho.com/en/getting-started/set-up-a-catalyst-project/general-settings/) of the project

#### Query Parameters

- **bucket_name** (Alphanumeric, mandatory): The [name of the bucket](https://docs.catalyst.zoho.com/en/cloud-scale/help/stratus/buckets/name-bucket/#ideal-practices-to-name-a-bucket)

- **object_key** (String, mandatory): Will contain the complete name of the object.

- **version_id** (String, optional): This is an ID generated by Stratus when Versioning is enabled. You can use `version_id` to refer to the required object.

#### Request Headers
 **Authorization:** Zoho-oauthtoken {oauth_token} 

**Optional Headers** 

 **CATALYST-ORG:** {org_id}

 **Environment:** Development

#### Scope

ZohoCatalyst.buckets.objects.READ

### Response Details

On successful execution, the response will contain the **200** status code, to indicate the object is present in the bucket. If the object is incorrect or not present in the bucket, you will get a **404** status code as your response.

**Sample Request**

```bash

curl -X HEAD https://api.catalyst.zoho.com/baas/v1/project/10108000003823392/bucket/object?bucket_name=myBucketName&object_key=image.jpeg&version_id=dfd233fcds2wd223/
-H "Authorization: Zoho-oauthtoken 1000.910*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*16.2f*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*57"

```

### SDK Documentation

* [Check Object Availability - Java SDK](https://docs.catalyst.zoho.com/en/sdk/java/v1/cloud-scale/stratus/check-object-availability/)
* [Check Object Availability - Node.js SDK](https://docs.catalyst.zoho.com/en/sdk/nodejs/v2/cloud-scale/stratus/check-object-availability/)
* [Check Object Availability - Python SDK](https://docs.catalyst.zoho.com/en/sdk/python/v1/cloud-scale/stratus/check-object-availability/)
* [Stratus - Web SDK](https://docs.catalyst.zoho.com/en/sdk/web/v4/cloud-scale/stratus/overview/)
* [Stratus - iOS SDK](https://docs.catalyst.zoho.com/en/sdk/ios/v2/cloud-scale/stratus/overview/)
* [Stratus - Android SDK](https://docs.catalyst.zoho.com/en/sdk/android/v2/cloud-scale/stratus/overview/)
* [Stratus - Flutter SDK](https://docs.catalyst.zoho.com/en/sdk/flutter/v2/cloud-scale/stratus/overview/)