# Get application environment instances (Last 24h)

GET https://app.unleash-instance.example.com/api/admin/metrics/instances/{appName}/environment/{environment}

Returns an overview of the instances for the given `appName` and `environment` that have received traffic in the last 24 hours.

Reference: https://docs.getunleash.io/api/get-application-environment-instances

## OpenAPI Specification

```yaml
openapi: 3.1.1
info:
  title: Get application environment instances (Last 24h)
  version: endpoint_metrics.getApplicationEnvironmentInstances
paths:
  /api/admin/metrics/instances/{appName}/environment/{environment}:
    get:
      operationId: get-application-environment-instances
      summary: Get application environment instances (Last 24h)
      description: >-
        Returns an overview of the instances for the given `appName` and
        `environment` that have received traffic in the last 24 hours.
      tags:
        - - subpackage_metrics
      parameters:
        - name: appName
          in: path
          required: true
          schema:
            type: string
        - name: environment
          in: path
          required: true
          schema:
            type: string
        - name: Authorization
          in: header
          description: Header authentication of the form `undefined <token>`
          required: true
          schema:
            type: string
      responses:
        '200':
          description: applicationEnvironmentInstancesSchema
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/applicationEnvironmentInstancesSchema'
        '404':
          description: The requested resource was not found.
          content: {}
components:
  schemas:
    ApplicationEnvironmentInstancesSchemaInstancesItems:
      type: object
      properties:
        instanceId:
          type: string
          description: >-
            A unique identifier identifying the instance of the application
            running the SDK. Often changes based on execution environment. For
            instance: two pods in Kubernetes will have two different instanceIds
        sdkVersion:
          type:
            - string
            - 'null'
          description: >-
            An SDK version identifier. Usually formatted as
            "unleash-client-<language>:<version>"
        clientIp:
          type:
            - string
            - 'null'
          description: >-
            An IP address identifying the instance of the application running
            the SDK
        lastSeen:
          type: string
          format: date-time
          description: The last time the application environment instance was seen
      required:
        - instanceId
    applicationEnvironmentInstancesSchema:
      type: object
      properties:
        instances:
          type: array
          items:
            $ref: >-
              #/components/schemas/ApplicationEnvironmentInstancesSchemaInstancesItems
          description: A list of instances
      required:
        - instances

```

## SDK Code Examples

```python
import requests

url = "https://app.unleash-instance.example.com/api/admin/metrics/instances/appName/environment/environment"

headers = {"Authorization": "<apiKey>"}

response = requests.get(url, headers=headers)

print(response.json())
```

```javascript
const url = 'https://app.unleash-instance.example.com/api/admin/metrics/instances/appName/environment/environment';
const options = {method: 'GET', headers: {Authorization: '<apiKey>'}};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://app.unleash-instance.example.com/api/admin/metrics/instances/appName/environment/environment"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "<apiKey>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://app.unleash-instance.example.com/api/admin/metrics/instances/appName/environment/environment")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authorization"] = '<apiKey>'

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.get("https://app.unleash-instance.example.com/api/admin/metrics/instances/appName/environment/environment")
  .header("Authorization", "<apiKey>")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://app.unleash-instance.example.com/api/admin/metrics/instances/appName/environment/environment', [
  'headers' => [
    'Authorization' => '<apiKey>',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://app.unleash-instance.example.com/api/admin/metrics/instances/appName/environment/environment");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "<apiKey>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

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

let request = NSMutableURLRequest(url: NSURL(string: "https://app.unleash-instance.example.com/api/admin/metrics/instances/appName/environment/environment")! 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()
```