--- title: Implement Real-Time Audiences for Feature Experimentation for server-side SDKs slug: feature-experimentation/docs/real-time-audiences-for-feature-experimentation-for-server-side-sdks docTags: createdAt: 2026-08-05T20:39:54.000Z --- After creating an audience with [Real-Time Audiences for Feature Experimentation](docId:6UBBxxRv331nBIVZ2lun8) and assigning it to a [flag rule](docId:-yq2-thNRv7-SgwCXpG90), you can integrate the audience in your server-side code. If you are not familiar with targeted deliveries and experiments in Feature Experimentation, it is recommended you follow the [Quickstart](docId\:GqD16Oyh9sH37TwarqEHo) guide for your specific SDK first before following this document. ## Install and initialize the server-side SDK :::hint{type="warning"} **Important** You may need to upgrade your SDK to the latest version to use Real-Time Audiences for Feature Experimentation. Refer to the [SDK compatibility matrix](docId:2shbZfPCkPAZ0mlZpL1TU) to view the newest version available for your SDK. ::: The first step is to install and initialize the Feature Experimentation SDK in your application. When initializing the SDK, you must enable the Optimizely Data Platform (ODP) audiences and the `ODPManager`. See the [Customize configuration](docId\:KjzMgmj-6wFmsgDC1wq5B) section for information on `ODPManager` customization options. Refer to the following documentation for your SDK: **C#** - [Install](docId\:t4HfKZrY-A5Uc37TFEJeu) - [Initialize](docId\:xoqfGXRS2U3DUf8EUgtsC) **Java** - [Install](docId\:j_tR91lKtVw5WCfcMOmtE) - [Initialize](docId\:WlItbLTrjYBNvKSjoGIFY) **JavaScript** – SDK versions 6.0.0 and later. - [Install](docId:3JawOqz5fbBQd8osjSukT) - [Initialize](docId:2bQ4KAFcVOAesqDOcmtCZ) **JavaScript (Node)** – SDK versions 5.3.5 and earlier. - [Install SDK](docId\:aWlYGdCB88CMVFXhGcI2o) - [Initialize SDK](docId\:bBBQu0Y_QWNguXJJ6sRw4) **Go** - [Install](docId\:EjET65QSc3PLAf2male2Q) - [Initialize](docId\:lA6eDbcuVC3C-SQUsCcXV) **Python** - [Install](docId\:YJuAv_l6YdHgu2Boes3aO) - [Initialize](docId:3RNo0adSzdB2ndnj5I_WC) **Ruby** - [Install](docId\:REGGc3P4WPkJW2XWh1dEr) - [Initialize](docId\:GZzK3CQxBF2g4uWupfu70) [Optimizely Agent](docId\:FBkIiB4shao_1U30W5cAu) ## Real-Time Audiences for Feature Experimentation using`OptimizelyUserContext` :::hint{type="info"} **Note** `OptimizelyUserContext` can only be created after the SDK instance is ready (the datafile has been fetched). ::: After you have installed and initialized the Optimizely client, you need to create an `OptimizelyUserContext` object with your Feature Experimentation userID and additional attributes. The `OptimizelyUserContext` object lets you make flag decisions and track events for a user context that you have already created using the `createUserContext` method. :::hint{type="info"} **Note** When an `OptimizelyUserContext` is created, the SDK automatically sends an identify request to ODP. ::: Call `fetchQualifiedSegments()` and then `isQualifiedFor()` on the `OptimizelyUserContext` object to first fetch the ODP audiences for the specific userID or any time you need to check if the user context is qualified for a given ODP real-time audience. Refer to your chosen SDK's documentation on `OptimizelyUserContext` for details and code samples: - [C#](docId\:UZTTnJ2LeXwXXWe_aZvjr) - [Go](docId\:YD23vbbeambJxxmSEXUo8) - [Java](docId\:gm_UYsgiYClOVsYuAnlBX) - [JavaScript](docId\:OExtupzmm3AyVp8uWgIoC) – SDK versions 6.0.0 and later. - [Javascript (Node)](docId\:jEgEOt1Ywg2IFdWasBps7) – SDK versions 5.3.5 and earlier. - [Python](docId\:UGnzh86pPS0MtU91FSSlQ) - [Ruby](docId\:CBB2m_VFyZWW2HqXI529Q) ## Make experiment decisions You can use the standard [Decide methods](docId\:Mq8a-0tyTzM32HEt362lj) enriched with [Real-Time Audiences for Feature Experimentation](docId:6UBBxxRv331nBIVZ2lun8) to return flag decisions for a user. The flag decision includes the status if the flag is enabled or disabled and the flag variation. When an ODP-type audience condition is required for the decision, the SDK can look up the ODP audiences in the current user context saved when `fetchQualifiedSegments()` is called. Refer to your specific SDK's documentation on calling these methods: **C#** - [Decide methods](docId\:QB-OuF0F-Tj3XpdYgXX1L) - [Real-Time Audiences for Feature Experimentation segment qualification methods](docId\:zhH9VEzcuw2gE1icY6hTU) **Go** - [Decide methods](docId\:BlCsg45md_3l5fQuAUQwO) - [Real-Time Audiences for Feature Experimentation segment qualification methods](docId\:jaSIo7LcJFLve2dx5desa) **Java** - [Decide methods](docId:6ZSh7uRg7JxlrHwft2Ogf) - [Real-Time Audiences for Feature Experimentation segment qualification methods](docId\:IhvMH_mWOLV_XGYpw-l8b) **JavaScript** – SDK versions 6.0.0 and later. - [Decide methods](docId\:SlmvozhQJ1rmI6AIIoqql) - [Real-Time Audiences for Feature Experimentation segment qualification methods](docId\:n2SxUgEcMIpHfqJk6Hg0Y) **JavaScript (Node)** – SDK versions 5.3.5 and earlier. - [Decide methods](docId\:OR0QUdFTq9bg4lGgOz-nH) - [Real-Time Audiences for Feature Experimentation segment qualification methods](docId\:acfLOrw1v-6HN-6C22eFj) **Python** - [Decide methods](docId\:i0YJZkiaylg7J6QKk3GR_) - [Real-Time Audiences for Feature Experimentation segment qualification methods](docId\:lnxTRZc6OudZqOWF2jLSc) **Ruby** - [Decide methods](docId\:W-MCwQUNp-EC5yaDomerg) - [Real-Time Audiences for Feature Experimentation segment qualification methods](docId:0XHlYTIKhKO-FHN6fCDL7) **Optimizely Agent** - [Fetch qualified segments](docId\:uhGRMsjV6oSlDxKZO_kn5) ## Send events to Optimizely Data Platform You can call `sendOdpEvent()` on the `OptimizelyClient` to send arbitrary event data to ODP. Refer to your preferred SDK to learn more: - [C#](docId\:xLprVQpcTKoqnlAVi-kI5) - [Go](docId\:MnF57itYgUbrjRd94dWBk) - [Java](docId\:T20aG6YXizVcReWi4Z-Z8) - [JavaScript](docId\:d2I10chLM1yXhaUzeMUS-) – SDK versions 6.0.0 and later. - [JavaScript (Node)](docId\:BPq_C7t_Af98i9P6XKJgb) – SDK versions 5.3.5 and earlier. - [Python](docId\:klN0th0aHuZNe0VlFqpKA) - [Ruby](docId\:Mei0PjzgwMObpXP2Rn4x3) - [Optimizely Agent](docId\:uhGRMsjV6oSlDxKZO_kn5) ## Customize configuration You must implement the `ODPManager` parameter when you initialize the SDK for the Real-Time Audiences integration to work. You can customize the `ODPManager` or override the entire `ODPManager` with a custom one. Each Feature Experimentation SDK implements its own way of supporting it. Refer to your desired SDK to learn more. - [C#](docId\:xoqfGXRS2U3DUf8EUgtsC) - [Go](docId\:lA6eDbcuVC3C-SQUsCcXV) - [Java](docId\:WlItbLTrjYBNvKSjoGIFY) - [JavaScript](docId:2bQ4KAFcVOAesqDOcmtCZ) – SDK versions 6.0.0 and later. - [JavaScript (Node)](docId\:bBBQu0Y_QWNguXJJ6sRw4) – SDK versions 5.3.5 and earlier. - [Python](docId:3RNo0adSzdB2ndnj5I_WC) - [Ruby](docId\:GZzK3CQxBF2g4uWupfu70) - [Optimizely Agent](docId:2ulb_rxGbxPeOEgVARD_m)