> ## Documentation Index
> Fetch the complete documentation index at: https://wb-21fd5541-docs-1778-mysql-updates.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# API Errors

> Common API errors and how to resolve them

The following table lists common API errors you might encounter:

| Error Code | Message                                                                                                                | Cause                                                                                                | Solution                                                                                                                                                                                                                     |
| ---------- | ---------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 401        | Authentication failed                                                                                                  | Your authentication credentials are incorrect or your W\&B project entity and/or name are incorrect. | Ensure you're using the correct API key and that your W\&B project name and entity are correct.                                                                                                                              |
| 402        | You exceeded your current quota, please check your plan and billing details                                            | Out of credits or reached monthly spending cap.                                                      | Get more credits or increase your limits. For more information, see [Usage information and limits](/inference/usage-limits/).                                                                                                |
| 403        | Country, region, or territory not supported                                                                            | Accessing the API from an unsupported location.                                                      | Please see [Geographic restrictions](/inference/usage-limits/#geographic-restrictions)                                                                                                                                       |
| 403        | W\&B Inference isn't available for personal accounts. Please switch to a non-personal account to access W\&B Inference | The user is on a personal account, which doesn't have access to W\&B Inference.                      | Switch to a non-personal account. If one isn't available, create a Team to create a non-personal account. For more information, see [Personal entities unsupported](/inference/usage-limits/#personal-entities-unsupported). |
| 429        | Concurrency limit reached for requests                                                                                 | Too many concurrent requests.                                                                        | Reduce the number of concurrent requests or increase your limits. For more information, see [Usage information and limits](/inference/usage-limits/).                                                                        |
| 500        | The server had an error while processing your request                                                                  | Internal server error.                                                                               | Retry after a brief wait and contact support if it persists.                                                                                                                                                                 |
| 503        | The engine is currently overloaded, please try again later                                                             | Server is experiencing high traffic.                                                                 | Retry your request after a short delay.                                                                                                                                                                                      |