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Feature Experimentation docs
Feature Experimentation API
Release Notes for Feature Experimentation
About the Feature Experimentation APIs
Generate tokens and use the REST APIs
REST API cookbook
API Recipes
Create a flag and variables
Create variations
Create events
Create attributes
Create audiences
Create experiment
Launch experiment
Conclude experiment
Analyze results
Optimizely Feature Experimentation API
Optimizely API
Permission Service
Optimizely Flags Scheduling API
Optimizely Agent API
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Optimizely Feature Experimentation API
Holdouts
6 API Methods
GET
List Holdouts for a project
Updated
16 Sep 2026
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POST
Create a new Holdout
Updated
16 Sep 2026
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DELETE
Delete a Holdout
Updated
16 Sep 2026
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GET
Fetch a single Holdout
Updated
16 Sep 2026
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POST
Update a Holdout using JSON Patch
Updated
16 Sep 2026
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GET
Fetch experiments associated with a holdout
Updated
16 Sep 2026
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