---
updatedAt: 2026-06-13T17:24:55.000Z
agentTools:
  projectIndex: https://developers.wingify.com/v2/llms.txt
---

# Feature Flag Rules(FE)

The Feature Experimentation REST APIs also enable developers to manage feature flag rules programmatically. Feature flag rules define how and when a feature is delivered to users—based on conditions such as audience segmentation, rollout percentages, or experiment variations.

Using the APIs, you can:

* Create a new rule for an existing feature flag, including rollout, A/B test, or personalization logic
* Retrieve the configuration details of a specific feature flag rule
* Update an existing rule to reflect changes in targeting strategy or experiment design
* Delete a rule that is no longer required
* List all rules associated with a given feature flag to get a complete view of its behavior and targeting logic

This API access provides fine-grained control over how features are rolled out and tested, enabling teams to dynamically adjust their strategies without relying on the user interface.

> 📘 Please Note
>
> **These APIs are applicable only to the [Feature Experimentation](https://developers.wingify.com/v2/docs/fme-overview) Product.** Ensure your project is configured accordingly before making API requests.