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

# Errors

The API uses standard HTTP status codes. Common responses include:

* `400` Bad Request (for example, an entity is disabled or the operation is unsupported)
* `401` Unauthorized (invalid or missing token)
* `403` Forbidden (invalid credentials or insufficient access)
* `404` Not Found
* `409` Conflict (data not ready yet or duplicate state)
* `500` Server error

Errors are returned as JSON with an error message.

```json theme={null}
{ "errorMessage": "Error description" }
```

## Entity not configured to sync

A message such as `This credential is configured to not sync Notes.` means that data type must be enabled on the credential used in the request. It is distinct from invalid authentication, an unsupported connector operation, or a sync that is still running.

Follow [Fix an entity that is not configured to sync](/docs/troubleshooting/entity-not-configured-to-sync). Read `errorMessage` when handling these failures; waiting alone will not enable the entity.


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