This topic lists the available LaunchDarkly SDKs.
The SDK types have different security considerations, as well as behavioral and architectural differences. They handle flag evaluations differently, utilize different kinds of SDK keys, and support different languages. Consider your use case carefully before you decide which SDKs to use.
To learn more, read Getting started with SDKs.
The SDKs are designed to evaluate feature flags in your application. If you want to interact programmatically with the LaunchDarkly product, for example to create or update account members, projects, or environments, or to search for existing flags, you’ll need to use the LaunchDarkly API. To learn more about the differences between these offerings, read Comparing LaunchDarkly’s REST API and SDK.
If you already know which SDKs you want to use, choose from the list of supported SDKs below.
If the language or framework you use is not listed here, we may provide a sample application to help you get started. Sample applications demonstrate that an SDK is compatible with a particular language or framework. However, LaunchDarkly only provides full support for those languages or frameworks that have a dedicated SDK.
We provide the following SDKs:
This section includes tables of minimum SDK versions required to support the listed features. Open each section to view minimum version requirements.
All versions of the server-side, client-side, mobile, and edge SDKs support evaluating feature flags.
This table lists the minimum SDK versions required of JavaScript-based client-side SDKs to support the listed features:
This table lists the minimum SDK versions required of non-JavaScript-based client-side SDKs to support the listed features:
This table lists the minimum SDK versions required of server-side SDKs with names that start with letters from A to K to support the listed features:
This table lists the minimum SDK versions required of server-side SDKs with names that start with letters from L to Z to support the listed features:
Edge SDKs are designed to be used with one of the LaunchDarkly client-side SDKs as follows:
If you are using newer versions of some edge SDKs, then the SDK can send events back to LaunchDarkly directly. Using a client-side SDK is not necessary. You do need to configure the SDK to enable sending events.
This table lists the minimum SDK versions required of edge SDKs to support the listed features:
AI SDKs are designed to interact with AgentControl configs. Configs provide management of your AI prompts and model configurations.
This table lists the minimum SDK versions required of AI SDKs to support the listed features:
