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

# Common HTTP status codes

> An overview of common HTTP response codes returned by the Helium ID API.

These HTTP status codes are returned in API calls to indicate the overall success or failure of a request.

| Code  | Description           | Why could you be seeing this code?                                                                                                                                                 |
| :---- | :-------------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `200` | OK                    | Returned as a general success code.                                                                                                                                                |
| `201` | Created               | Returned when a new resource (e.g., a verification session) was successfully created.                                                                                              |
| `400` | Bad Request           | Returned when the server deems that something is incorrect on the client side. Check the response payload for additional troubleshooting details to understand the specific issue. |
| `401` | Unauthorized          | Returned when there is an issue with your authentication, such as a missing, invalid, or expired API Key.                                                                          |
| `404` | Not Found             | Returned when the requested resource (e.g., a verification session ID) cannot be found.                                                                                            |
| `500` | Internal Server Error | A generic error message returned when something went wrong on Helium ID's end.                                                                                                     |