> For the complete documentation index, see [llms.txt](https://docs.licensespring.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.licensespring.com/sdks/errors-and-response-codes.md).

# Errors and Response Codes

| Error key                       | HTTP code | Description                                                                                    |
| ------------------------------- | --------: | ---------------------------------------------------------------------------------------------- |
| `active_license_required`       |       400 | active license is required                                                                     |
| `authorization_invalid_headers` |       400 | invalid headers value in authorization                                                         |
| `authorization_missing_params`  |       400 | some parameters are missing in authorization: different, parameters                            |
| `device_not_found`              |       400 | an active device matching `hardware_id` not found                                              |
| `hmac_required`                 |       400 | hmac is required algorithm                                                                     |
| `internal_error`                |       500 | Server-side error: Internal error                                                              |
| `invalid_api_key`               |       400 | provided api key is not valid                                                                  |
| `license_activated_max_times`   |       400 | license is already activated max number of times                                               |
| `license_key_required`          |       400 | `license_key` is missing from the request                                                      |
| `license_not_active`            |       400 | license is not active                                                                          |
| `license_not_enabled`           |       400 | license is not enabled                                                                         |
| `license_not_found`             |       400 | license with provided `license_key` not found                                                  |
| `missing_hardware_id`           |       400 | `hardware_id` missing in the request                                                           |
| `missing_headers`               |       400 | some headers are missing                                                                       |
| `missing_parameter`s\`          |       400 | some parameters are missing in the request: different, parameters                              |
| `order_id_exists`               |       409 | Order with this ID already exists                                                              |
| `signature_mismatch`            |       401 | signature mismatch                                                                             |
| `trial_expired`                 |       400 | trial period for device has expired                                                            |
| `unknown_product`               |       400 | provided product was not found                                                                 |
| `unsupported_product_feature`   |       400 | One or more of requested product features do not exists or they are not enabled on the product |
| `version_not_found`             |       400 | file at requested version does not exist                                                       |
| `disabled_product`              |       400 | Provided product is disabled.                                                                  |
| `archived_product`              |       400 | Provided product is archived.                                                                  |
| `license_transferred_max_times` |       400 | license transferred max times                                                                  |
| `licenseUserActivatedMaxTimes`  |       400 | license user has already activated license max number of times                                 |


---

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