How to list task attachments in Zoho Desk

Listing all file attachments linked to a Zoho Desk task is a single authenticated GET request — here is exactly how to make it work.

Why this matters

When building integrations or audit workflows, you often need to programmatically retrieve every file attached to a specific task rather than browsing the Zoho Desk UI manually. This is also useful for syncing attachments to external storage, validating that required documents exist before closing a task, or feeding attachment metadata into downstream automation.

Step-by-step

Step 1. Confirm your OAuth token carries the correct Zoho Desk task scope. The required scope for reading task data is Desk.tasks.READ (or the broader Desk.tasks.ALL). Without this scope in your token, the API will reject the request. ^[7]

Step 2. Identify the taskId for the task whose attachments you want to retrieve. This is the unique identifier Zoho Desk assigns to each task record — you can obtain it from a prior task-listing call or from the task's URL in the Desk portal.

Step 3. Send a GET request to the following endpoint, substituting your actual task identifier:

GET /api/v1/tasks/{taskId}/attachments

This operation is named listtaskattachments internally. ^[1]

Step 4. If you are using the Python client wrapper, call the method as shown below:

result = client.list_task_attachments(taskId="your-task-id")

The method accepts an optional p parameter for any additional query parameters (such as pagination) you wish to pass. ^[1]

Step 5. Handle pagination if the task has many attachments. Pass page-control values through the p dictionary argument to walk through result pages. ^[1]

Step 6. Parse the response. The returned payload will contain the attachment records associated with that task, including metadata such as file names, sizes, and identifiers you can use for further operations.

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> Note: Beam Help is an independent expert support resource for Zoho products — we are not official Zoho support. Always cross-reference with the latest Zoho Desk API documentation for any breaking changes.

Common pitfalls

• Wrong scope: Using only Desk.tickets.READ will not grant access to task attachment endpoints. Make sure Desk.tasks.READ or Desk.tasks.ALL is explicitly included in your OAuth scope list. ^[7]

• Confusing task attachments with account attachments: There is a separate endpoint — GET /api/v1/accounts/{accountId}/attachments — for account-level attachments. Do not mix up taskId and accountId when constructing your request URL. ^[8]

• Attempting a POST instead of GET: The POST /api/v1/tasks/{taskId}/attachments endpoint is for *creating* a new attachment, not listing existing ones. Using the wrong HTTP method will result in an unintended write operation rather than a read. ^[4]

• Missing or malformed taskId: Passing an empty string or an ID from a different entity type (such as a ticket ID) will return an error or empty result. Always validate the ID before making the call.

What to check

• Verify that your active OAuth token includes Desk.tasks.READ or Desk.tasks.ALL in its granted scopes before making the request. ^[7]
• Confirm the taskId value is correct by cross-referencing it with a task-listing response or the Zoho Desk portal URL for that task. ^[1]
• If the response returns an empty list unexpectedly, check whether attachments were added to the ticket itself rather than the task — those would be retrieved via a different attachments endpoint. ^[8]