Zoho books api - Create item api - returns 404 error

Zoho books api - Create item api - returns 404 error

I use this end point to create item.

https://books.zoho.com/api/v3/items

This is the data sent through JSONString parameter.

{"name": "test1228",
"description": "xx1",
"sku": "test12281",
"account_id":"482615000000000388",
"purchase_account_id":"450148000000034003",
"purchase_rate":1.00,"tax_id": "450148000000052177","item_type":"inventory",
"inventory_account_id": "450148000000034001","rate":"1",}

The API returns 404 error. 

This is used to work earlier. But it shows error now. Any help?