# Neptune Service Errors
<a name="errors"></a>

Amazon Neptune has two different sets of errors:
+ The graph engine errors that are for the Neptune DB cluster endpoints only.
+ The errors that are associated with the APIs for creating and modifying Neptune resources with the AWS SDK and AWS Command Line Interface (AWS CLI).

**Topics**
+ [Insufficient DB instances available](insufficientDBInstancesAvailable.md)
+ [Graph Engine Error Messages and Codes](errors-engine-codes.md)
+ [DB Cluster Management API Error Messages and Codes](CommonErrors.md)
+ [Neptune Loader Error and Feed Messages](loader-message.md)

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Neptune. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query neptune` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).