---
title: /api/admin/segments
---
import ApiRequest from '@site/src/components/ApiRequest'; export const basePath = "api/admin/segments"; export const path = (p) => `${basePath}/${p}`;
:::note Availability
**Plan**: [Pro](/availability#plans) and [Enterprise](https://www.getunleash.io/pricing) | **Version**: `4.13+`
:::
:::note
To use the admin API, you'll need to [create and use an admin API token](/how-to/how-to-create-api-tokens).
:::
The segments API lets you create, read, update, and delete [segments](/reference/segments).
## Get all segments
Retrieve all segments that exist in this Unleash instance. Returns a list of [segment objects](#segment-type-description).
Example responses
### 200 OK
``` json
[
{
"id": 1,
"name": "my-segment",
"description": "a segment description",
"constraints": [],
"createdBy": "user@example.com",
"createdAt": "2022-04-01T14:02:25.491Z"
}
]
```
## Create segment
Create a new segment with the specified configuration.
Example responses
### 201 Created
The segment was successfully created. This response has no body.
### 400 Bad Request
A segment with the provided name already exists.
### Payload structure
Use a JSON object with the following properties to create a new segment.
| Property | Type | Required | Description | Example value |
|---------------|--------------------------------------------|----------|----------------------------------|--------------------------------------------------|
| `name` | string | Yes | The name of the segment. | `"mobile-users"` |
| `description` | string | No | A description of the segment. | `"This segment is for users on mobile devices."` |
| `constraints` | list of [constraint objects](#constraint-type-description) | Yes | The constraints in this segment. | `[]` |
## Get segment by ID
Retrieves the segment with the specified ID.
")} title="Retrieve the segment with the provided ID."/>
Example responses
### 200 OK
``` json
{
"id": 1,
"name": "my-segment",
"description": "a segment description",
"constraints": [],
"createdBy": "user@example.com",
"createdAt": "2022-04-01T14:02:25.491Z"
}
```
### 404 Not Found
No segment with the provided ID exists.
## Update an existing segment
Replace the data of the specified segment with the provided payload.
")} title="Update a segment with new data."
payload={{
"name": "my-segment",
"description": "this is a newly provided description.",
"constraints": []
}}
/>
Example responses
### 204 No Content
The update was successful. This response has no body.
### 404 Not Found
No segment with the provided ID exists.
## Delete a segment
Delete the request with the specified ID.
")} title="Delete a segment." />
Example responses
### 204 No Content
The segment was deleted successfully.
### 404 Not Found
No segment with the provided ID exists.
### 409 Conflict
The segment is being used by at least one strategy and can not be deleted. To delete the segment, first remove it from any strategies that use it.
## List strategies that use a specific segment
Retrieve all strategies that use the specified segment. Returns a list of [activation strategy objects](#activation-strategy-type-description).
/strategies")} title="Retrieve all activation strategies that use the specified segment."/>
Example responses
### 200 OK
``` json
[
{
"id": "strategy-id",
"featureName": "my-feature",
"projectId": "my-project",
"environment": "development",
"strategyName": "my strategy",
"parameters": {},
"constraints": [],
"createdAt": "2022-04-01T14:02:25.491Z"
}
]
```
### 404 Not Found
No segment with the provided id exists.
## List segments applied to a specific strategy
Retrieve all segments that are applied to the specified strategy. Returns a list of [segment objects](#segment-type-description).
")} title="Retrieve all segments that are used by the specified strategy."/>
Example responses
### 200 OK
``` json
[
{
"id": 1,
"name": "my-segment",
"description": "a segment description",
"constraints": [],
"createdBy": "user@example.com",
"createdAt": "2022-04-01T14:02:25.491Z"
}
]
```
### 404 Not Found
No strategy with the provided id exists.
## Replace activation strategy segments
Replace the segments applied to the specified activation strategy with the provided segment list.
### Remove all segments from an activation strategy
To remove all segments from an activation strategy, use this endpoint and provide an empty list of `segmentIds`. For instance, the following payload would remove all segments from the strategy "my-strategy".
``` json
{
"projectId": "my-project",
"strategyId": "my-strategy",
"environmentId": "development",
"segmentIds": []
}
```
Example responses
### 201 Created
The strategy's list of segments was successfully updated.
### 403 Forbidden
You do not have access to edit this activation strategy.
### 404 Not Found
No strategy with the provided ID exists.
### Payload structure
Use a JSON object with the following properties to update the list of applied segments.
| Property | Type | Required | Description | Example value |
|-----------------|-------------------------------|----------|---------------------------------------------------|-----------------|
| `projectId` | string | Yes | The ID of the feature flag's project. | `"my-project"` |
| `strategyId` | string | Yes | The ID of the strategy. | `"my-strategy"` |
| `environmentId` | string | Yes | The ID of the environment. | `"development"` |
| `segmentIds` | list of segment IDs (numbers) | Yes | The list of segment IDs to apply to the strategy. | `[]` |
## API types
This section describes the data objects returned by the endpoints in the segments API. For information on a specific endpoint, refer to its specific description above.
### Segment {#segment-type-description}
#### Example
``` json
{
"id": 12054,
"name": "segment name",
"description": "segment description",
"constraints": [],
"createdBy": "you@example.com",
"createdAt": "2022-05-23T15:45:22.000Z"
}
```
#### Description
| Property | Type | Required | Description | Example value |
|---------------|------------------------------------------------------------|----------|---------------------------------------------------------------------------|----------------------------------|
| `id` | number | Yes | The segment's ID. | `546` |
| `name` | string | Yes | The segment's name | `"my-segment"` |
| `description` | string | No | An optional description of the segment. | `"segment description"` |
| `constraints` | list of [constraint objects](#constraint-type-description) | Yes | The list of constraint objects in the segment. | `[]` |
| `createdBy` | string | No | An identifier for who created the segment. | `"you@example.com"` |
| `createdAt` | timestamp string | Yes | The time when the segment was created. Format: `YYYY-MM-DDThh:mm:ss.sTZD` | `"2022-04-23T13:56:24.45+01:00"` |
### Constraint {#constraint-type-description}
#### Example
```json
{
"contextName": "appName",
"operator": "STR_CONTAINS",
"values": [],
"inverted": false,
"caseInsensitive": false
}
```
#### Description
:::note `values` and `value`
Some constraint operators only support single values. If a constraint uses one of these operators, the payload will contain a `value` property with the correct value. However, for backwards compatibility reasons, the payload will *also* contain a `values` property. If the operator accepts multiple values, the `value` property will not be present. Visit the [strategy constraints documentation](/reference/strategy-constraints) for more information on what operators support what number of values.
:::
| Property | Type | Required | Description | Example value |
|-------------------|-----------------------------------------------------------------------------------------------|----------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------|
| `contextName` | string | Yes | The name of the context field targeted by the constraint. | `"myContextField"` |
| `operator` | string, the name of one of the [constraint operators](/reference/strategy-constraints) | Yes | The operator to apply to the context field. | `"DATE_BEFORE"` |
| `values` | a list of strings | Yes | The list of values to apply the constraint operator to. | `["value a", "value b"]` |
| `value` | string | No | The value to apply the constraint operator to. | `"15"` |
| `inverted` | boolean | No | Whether the result of [the constraint will be negated or not](/reference/strategy-constraints#constraint-negation). | `false` |
| `caseInsensitive` | boolean string | No | Whether the constraint operator is case sensitive or not. Only [applies to some string-based operators](/reference/strategy-constraints#string-operators). | `false` |
### Activation strategy {#activation-strategy-type-description}
#### Example
``` json
{
"id": "64fbe72b-d107-4b26-b6b8-4fead08d286c",
"environment": "development",
"featureName": "my-feature",
"projectId": "my-project",
"strategyName": "flexibleRollout"
}
```
#### Description
| Property | Type | Required | Description | Example value |
|----------------|---------------------------------------------------------------|----------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------|
| `id` | GUID string | No | The ID of the strategy. | `"64fbe72b-d107-4b26-b6b8-4fead08d286c"` |
| `environment` | string | Yes | The name of the strategy's environment. | `"development"` |
| `featureName` | string | Yes | The name of the feature the strategy is applied to. | `"my-feature"` |
| `projectId` | string | Yes | The name of the current project. | `"my-project"` |
| `strategyName` | string | Yes | The name of the strategy. | `"flexibleRollout"` |