Get feature flag

Get a single feature flag by key. By default, this returns the configurations for all environments. You can filter environments with the env query parameter. For example, setting env=production restricts the returned configurations to just the production environment.

Recommended use

This endpoint can return a large amount of information. Specifying one or multiple environments with the env parameter can decrease response time and overall payload size. We recommend using this parameter to return only the environments relevant to your query.

Expanding response

LaunchDarkly supports the expand query param to include additional fields in the response, with the following fields:

• evaluation includes evaluation information within returned environments, including which context kinds the flag has been evaluated for in the past 30 days
• migrationSettings includes migration settings information within the flag and within returned environments. These settings are only included for migration flags, that is, where purpose is migration.

For example, expand=evaluation includes the evaluation field in the response.