---
title: 2025 API Feature Experimentation changelog
slug: feature-experimentation/release-notes/2025-api-feature-experimentation-changelog
docTags: 
createdAt: 2026-08-06T15:30:20.908Z
---

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## May 29, 2025 – Metrics API updates

Removed the `/metrics` endpoints from the [Optimizely API](docId\:CwbqaxvWjxN8pwcorN55w). Use the [Metrics Hub Service API's /metrics endpoints](https://docs.developers.optimizely.com/feature-experimentation/reference/listmetrics) instead.

## May 7, 2025 – API updates

Updated the following endpoints:

- [Update a metric set](https://docs.developers.optimizely.com/feature-experimentation/reference/patchmetricsets)
  - Updated the summary.
  - Added more information to the description.
- [Create a metric set](https://docs.developers.optimizely.com/feature-experimentation/reference/putmetricsets)
  - Added more information to the description.

## March 18, 2025 – New endpoints

Introduced new endpoints to support Feature Experimentation's new permission service which enables granular permissions. See [Granular roles and permissions](docId\:VfzalP5Ep4rqE-gTd6p7m).

### Entity

- [Get User Permissions For Project Entity Type](docId\:G7lsUJXloG5ZIRQJz7JYB)
- [Get Team Permissions For Project Entity Type](docId\:DJRIZaqg0yeZmehX9nQqx)
- [Get Entity Permissions](docId\:iSSM5xDQEddOQDQQ5GHOG)
- [Change Permissions](docId\:lzyqe2mr2f3bfQIejDGKi)

### Team management

- [Get Teams](docId\:gON8tI8BQ9NFNgJoRaj4q)
- [Create Team](docId\:OgWCxGeR6MAmGZnWs_C_w)
- [Delete Team](docId\:Pv_6j-9us6iqiWnnTzMFC)
- [Get Team Info](docId\:atzOwMPkMRJInjHdE_rnS)
- [Update Team](docId\:ZooFr4UkJQiNRtFrDJJzQ)

## February 20, 2025 – API updates

Updated the [Retrieve changes for a project](docId\:SXDBIrOGqRlaNtlIfxhrS) endpoint to return a 200 empty response when the request's page number is invalid instead of a 404 error.