# Overview

### QLM API Categories

| API                                                 | Description                                                                                                        |
| --------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------ |
| Client-Side API                                     | API used in your application that performs local operations without contacting the License Server                  |
| License Server Application API                      | API used in your application that contacts the License Server to query or update information                       |
| License Server Management API                       | API used outside the context of your application to integrate QLM with other 3rd party tools such as a CRM system. |
| Analytics API                                       | API related to the QLM Analytics features in QLM Enterprise                                                        |
| Cloud-based Floating License API                    | API used in your application for operations related to Cloud-based floating licenses.                              |
| On-premise Floating License API                     | API used in your application for operations related to on-premise floating licenses.                               |
| [HTTP Methods](/docs/api-reference/http-methods.md) | API that can be invoked via a URL, typically used for integration with eCommerce providers.                        |

### QLM API Classes

| Class                                                                                            | Description                                                                             |
| ------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------- |
| [IQlmLicense](/docs/api-reference/.net-api/qlmlicense.md)                                        | This is the main licensing class that provides access to the core functionality of QLM. |
| [ILicenseInfo](/docs/api-reference/.net-api/ilicenseinfo.md)                                     | Hold license information                                                                |
| [IQlmHardware](/docs/api-reference/.net-api/iqlmhardware.md)                                     | Class to extract hardware information                                                   |
| [IQlmCustomerInfo](/docs/api-reference/.net-api/iqlmcustomerinfo.md)                             | Holds customer information                                                              |
| [IQlmAnalytics](/docs/api-reference/.net-api/iqlmanalytics.md)                                   | Exposes all methods related to the Analytics feature                                    |
| [IQlmCloudFloatingLicenseHelper](/docs/api-reference/.net-api/iqlmcloudfloatinglicensehelper.md) | Helper class for cloud-based floating licenses                                          |
| [IQlmFloatingLicenseHelper](/docs/api-reference/.net-api/iqlmfloatinglicensehelper.md)           | Helper class for on-premise floating licenses                                           |
| [IQlmFloatingLicenseMgr](/docs/api-reference/.net-api/iqlmfloatinglicensemgr.md)                 | Main class for on-premise floating licenses                                             |
| [IQlmProductProperties](/docs/api-reference/.net-api/iqlmproductproperties.md)                   | Manages a collection of Product Properties                                              |
| [IQlmProductProperty](/docs/api-reference/.net-api/iqlmproductproperty.md)                       | Main class for working with product properties                                          |


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