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# Custom Objects API

> Custom Objects API allows you to create and manage your custom object definitions, records, and bulk jobs through API operations.

Custom Objects API allows you to create and manage your custom object definitions, records, and bulk jobs through API operations.

The Custom Objects feature provides API for you to extend the Zuora data model with custom objects and accommodate your specific use cases. See the following Custom Objects API sections in Zuora API Reference.

* [Custom Object Definitions](https://developer.zuora.com/v1-api-reference/api/tag/Custom-Object-Definitions/)
* [Custom Object Records](https://developer.zuora.com/v1-api-reference/api/tag/Custom-Object-Records/)
* [Custom Object Jobs](https://developer.zuora.com/v1-api-reference/api/tag/Custom-Object-Jobs/)

## Custom Objects API error code

If a Custom Objects API call fails, an 8-digit error code will return. An 8-digit error code consists of a 6-digit resource code and a 2-digit error category code. For example, in the error code `71012520` , `710125` is the resource code and `20` is the error category code.