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

# Error Codes

> Application-level error codes from the CubeStack API.

# Error Codes

Detailed error codes returned in API error responses.

## Authentication Errors

| Code               | Message             | Resolution                            |
| ------------------ | ------------------- | ------------------------------------- |
| `AUTH_MISSING_KEY` | API key is required | Include `X-Api-Key` header            |
| `AUTH_INVALID_KEY` | Invalid API key     | Check your key is correct and active  |
| `AUTH_EXPIRED_KEY` | API key has expired | Generate a new key in the admin panel |

## Validation Errors

| Code                  | Message              | Resolution                               |
| --------------------- | -------------------- | ---------------------------------------- |
| `VALIDATION_REQUIRED` | Field is required    | Provide a value for the required field   |
| `VALIDATION_TYPE`     | Invalid field type   | Ensure the value matches the column type |
| `VALIDATION_UNIQUE`   | Value must be unique | Use a different value                    |
| `VALIDATION_RANGE`    | Value out of range   | Check min/max constraints                |

## Resource Errors

| Code                | Message           | Resolution             |
| ------------------- | ----------------- | ---------------------- |
| `PROJECT_NOT_FOUND` | Project not found | Check the project slug |
| `CUBE_NOT_FOUND`    | Cube not found    | Check the cube slug    |
| `RECORD_NOT_FOUND`  | Record not found  | Check the record ID    |

## Rate Limit Errors

| Code                  | Message           | Resolution                  |
| --------------------- | ----------------- | --------------------------- |
| `RATE_LIMIT_EXCEEDED` | Too many requests | Wait and retry with backoff |