> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.getunleash.io/api/get-features/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.getunleash.io/_mcp/server.

# Get Features

GET https://edge.unleash-instance.example.com/api/client/features

Reference: https://docs.getunleash.io/api/get-features

## Authentication

- `Authorization` header (required) — API Key authentication via header

## Request

### Query parameters

- `namePrefix` (string, optional, nullable)

## Response

### 200

Return feature toggles for this token

- `features` (list of ClientFeature, required)
- `version` (integer, required)
- `meta` (Meta, optional, nullable)
- `query` (Query, optional, nullable)
- `segments` (list of Segment, optional, nullable)

## Errors

### 400 Bad Request Error

Invalid parameters used

- `any`

### 403 Forbidden Error

Was not allowed to access features

- `any`

## Types

### ClientFeature

- `enabled` (boolean, required)
- `name` (string, required)
- `createdAt` (string, optional, nullable)
- `dependencies` (list of FeatureDependency, optional, nullable)
- `description` (string, optional, nullable)
- `impressionData` (boolean, optional, nullable)
- `lastSeenAt` (string, optional, nullable)
- `project` (string, optional, nullable)
- `stale` (boolean, optional, nullable)
- `strategies` (list of Strategy, optional, nullable)
- `type` (string, optional, nullable)
- `variants` (list of Variant, optional, nullable)

### Meta

- `etag` (string, optional, nullable)
- `queryHash` (string, optional, nullable)
- `revisionId` (integer, optional, nullable)

### Query

- `environment` (string, optional, nullable)
- `inlineSegmentConstraints` (boolean, optional, nullable)
- `namePrefix` (string, optional, nullable)
- `projects` (list of string, optional, nullable)
- `tags` (list of list of string, optional, nullable)

### Segment

- `constraints` (list of Constraint, required)
- `id` (integer, required)

### FeatureDependency

- `feature` (string, required)
- `enabled` (boolean, optional, nullable)
- `variants` (list of string, optional, nullable)

### Strategy

- `name` (string, required)
- `constraints` (list of Constraint, optional, nullable)
- `parameters` (map from string to string, optional, nullable)
- `segments` (list of integer, optional, nullable)
- `sortOrder` (integer, optional, nullable)
- `variants` (list of StrategyVariant, optional, nullable)

### Variant

- `name` (string, required)
- `weight` (integer, required)
- `overrides` (list of Override, optional, nullable)
- `payload` (Payload, optional, nullable)
- `stickiness` (string, optional, nullable)
- `weightType` (enum, optional, nullable)
  - Allowed values: `fix`, `variable`

### Constraint

- `contextName` (string, required)
- `operator` (Operator, required)
- `caseInsensitive` (boolean, optional)
- `inverted` (boolean, optional)
- `value` (string, optional, nullable)
- `values` (list of string, optional, nullable)

### StrategyVariant

- `name` (string, required)
- `weight` (integer, required)
- `payload` (Payload, optional, nullable)
- `stickiness` (string, optional, nullable)

### Override

- `contextName` (string, required)
- `values` (list of string, required)

### Payload

- `type` (string, required)
- `value` (string, required)

### Operator

### Operator19

- `UNKNOWN` (string, required)

## Examples

**Response**

```json
{
  "features": [
    {
      "enabled": true,
      "name": "string",
      "createdAt": "2024-01-15T09:30:00Z",
      "dependencies": [
        {
          "feature": "string",
          "enabled": true,
          "variants": [
            "string"
          ]
        }
      ],
      "description": "string",
      "impressionData": true,
      "lastSeenAt": "2024-01-15T09:30:00Z",
      "project": "string",
      "stale": true,
      "strategies": [
        {
          "name": "string",
          "constraints": [
            {
              "contextName": "string",
              "operator": "NOT_IN",
              "caseInsensitive": true,
              "inverted": true,
              "value": "string",
              "values": [
                "string"
              ]
            }
          ],
          "parameters": {},
          "segments": [
            1
          ],
          "sortOrder": 1,
          "variants": [
            {
              "name": "string",
              "weight": 1,
              "payload": null,
              "stickiness": "string"
            }
          ]
        }
      ],
      "type": "string",
      "variants": [
        {
          "name": "string",
          "weight": 1,
          "overrides": [
            {
              "contextName": "string",
              "values": [
                "string"
              ]
            }
          ],
          "payload": null,
          "stickiness": "string",
          "weightType": null
        }
      ]
    }
  ],
  "version": 1,
  "meta": null,
  "query": null,
  "segments": [
    {
      "constraints": [
        {
          "contextName": "string",
          "operator": "NOT_IN",
          "caseInsensitive": true,
          "inverted": true,
          "value": "string",
          "values": [
            "string"
          ]
        }
      ],
      "id": 1
    }
  ]
}
```

**SDK Code**

```javascript Node.js SDK
import { initialize } from 'unleash-client';

const unleash = initialize({
  url: 'https://edge.unleash-instance.example.com/api/',
  appName: 'my-app',
  customHeaders: { Authorization: '<your-backend-token>' },
});

// The SDK fetches all feature flag configurations from this
// endpoint at startup and polls for updates in the background.
unleash.on('ready', () => {
  const enabled = unleash.isEnabled('my-feature');
});

```

```python Python SDK
from UnleashClient import UnleashClient

client = UnleashClient(
    url="https://edge.unleash-instance.example.com/api/",
    app_name="my-app",
    custom_headers={'Authorization': '<your-backend-token>'})

client.initialize_client()

# The SDK fetches all feature flag configurations from this
# endpoint at startup and polls for updates in the background.
enabled = client.is_enabled("my-feature")

```

```java Java SDK
UnleashConfig config = UnleashConfig.builder()
        .appName("my-app")
        .instanceId("my-instance")
        .unleashAPI("https://edge.unleash-instance.example.com/api/")
        .apiKey("<your-backend-token>")
        .build();

Unleash unleash = new DefaultUnleash(config);

// The SDK fetches all feature flag configurations from this
// endpoint at startup and polls for updates in the background.
boolean enabled = unleash.isEnabled("my-feature");

```

```go Go SDK
package main

import (
    "net/http"

    unleash "github.com/Unleash/unleash-go-sdk/v6"
)

func main() {
    err := unleash.Initialize(
        unleash.WithAppName("my-app"),
        unleash.WithUrl("https://edge.unleash-instance.example.com/api/"),
        unleash.WithCustomHeaders(http.Header{"Authorization": {"<your-backend-token>"}}),
    )
    if err != nil {
        panic(err)
    }
    defer unleash.Close()
    unleash.WaitForReady()

    // The SDK fetches all feature flag configurations from this
    // endpoint at startup and polls for updates in the background.
    enabled := unleash.IsEnabled("my-feature", unleash.FeatureOptions{})
}

```

```ruby Ruby SDK
require 'unleash'

@unleash = Unleash::Client.new(
  app_name: 'my-app',
  url: 'https://edge.unleash-instance.example.com/api/',
  custom_http_headers: { 'Authorization': '<your-backend-token>' }
)

# The SDK fetches all feature flag configurations from this
# endpoint at startup and polls for updates in the background.
enabled = @unleash.is_enabled?('my-feature')

```

```php PHP SDK
use Unleash\Client\UnleashBuilder;

$unleash = UnleashBuilder::create()
    ->withAppName('my-app')
    ->withAppUrl('https://edge.unleash-instance.example.com/api/')
    ->withInstanceId('my-instance')
    ->withHeader('Authorization', '<your-backend-token>')
    ->build();

// The SDK fetches feature flag configurations from this endpoint
// on demand and caches them. It does not poll in the background.
$enabled = $unleash->isEnabled('my-feature');

```

```csharp .NET SDK
using Unleash;

var settings = new UnleashSettings()
{
    AppName = "my-app",
    UnleashApi = new Uri("https://edge.unleash-instance.example.com/api/"),
    CustomHttpHeaders = new Dictionary<string, string>()
    {
        { "Authorization", "<your-backend-token>" }
    }
};

var unleash = new DefaultUnleash(settings);

// The SDK fetches all feature flag configurations from this
// endpoint at startup and polls for updates in the background.
var enabled = unleash.IsEnabled("my-feature");

```

```rust Rust SDK
// The SDK reads its configuration from these environment variables:
// UNLEASH_API_URL=https://edge.unleash-instance.example.com/api/
// UNLEASH_CLIENT_SECRET=<your-backend-token>
let config = EnvironmentConfig::from_env()?;
let client = Arc::new(
    client::ClientBuilder::default()
        .enable_string_features()
        .into_client::<UserFeatures>(
            &config.api_url,
            &config.app_name,
            &config.instance_id,
            config.secret,
        )?,
);
client.register().await?;

// The client does not poll on its own. Run the polling loop in a
// background task. The loop fetches feature flag configurations
// from this endpoint at the configured interval.
let poller = client.clone();
tokio::spawn(async move { poller.poll_for_updates().await });
let enabled = client.is_enabled_str("my-feature", None, false);

```

```swift
import Foundation

let headers = ["Authorization": "<apiKey>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://edge.unleash-instance.example.com/api/client/features")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```