> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fintoc.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Error object

## The Error object

An `Error` represents a failed API request, describing what went wrong. It appears in the response body, nested under the `error` key, whenever a request does not succeed.

```json Error Object theme={null}
{
    "error": {
        "code": "missing_parameter",
        "doc_url": "https://fintoc.com/docs#invalid-request-error",
        "message": "Missing required param: link_token",
        "param": "link_token",
        "type": "invalid_request_error"
    }
}
```

| Attribute | Type     | Description                                                                                                                                                                                                                                                                                                |
| :-------- | :------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `code`    | `string` | The particular error that occurred. The API error codes follow the [standard HTTP error conventions for status codes](https://developer.mozilla.org/en-US/docs/Web/HTTP/Status#client_error_responses).                                                                                                    |
| `doc_url` | `string` | The URL of the documentation associated with the error code.                                                                                                                                                                                                                                               |
| `message` | `string` | Friendly message detailing the error. This field can change its text content for the same `code` value in time, so it shouldn't be used programmatically.                                                                                                                                                  |
| `param`   | `string` | If the error is related to a parameter, this attribute indicates that parameter. It can be `null`.                                                                                                                                                                                                         |
| `type`    | `string` | The type of the error. It may be `api_error`, `authentication_error`, `link_error`, `institution_error`, `invalid_request_error`, `new_contact_error` or `amount_error`. The last two are only if you [pre-validate payments](/guides/payments/direct-payments/check-payment-eligibility-direct-payments). |