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

# Get application overview

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

Returns an overview of the specified application (`appName`).

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

## Authentication

- `Authorization` header (required) — API key needed to access this API
- `Authorization` header (bearer token, required) — API key needed to access this API, in Bearer token format

## Request

### Path parameters

- `appName` (string, required)

## Response

### 200

applicationOverviewSchema

- `projects` (list of string, required) — The list of projects the application has been using.
- `featureCount` (double, required) — The number of features the application has been using.
- `environments` (list of applicationOverviewEnvironmentSchema, required) — The list of environments the application has been using.
- `issues` (applicationOverviewIssuesSchema, required) — This list of issues that might be wrong with the application

## Errors

### 404 Not Found Error

The requested resource was not found.

- `id` (string, optional) — The ID of the error instance
- `name` (string, optional) — The name of the error kind
- `message` (string, optional) — A description of what went wrong.

## Types

### applicationOverviewEnvironmentSchema

Data about an application environment

- `name` (string, required) — Name of the application environment
- `instanceCount` (double, required) — The number of instances of the application environment
- `sdks` (list of string, required) — SDKs used in the application environment
- `frontendSdks` (list of string, required) — Frontend SDKs used in the application environment
- `backendSdks` (list of string, required) — Backend SDKs used in the application environment
- `lastSeen` (string, required, nullable) — The last time the application environment was seen
- `issues` (applicationEnvironmentIssuesSchema, required) — This list of issues that might be wrong with the application

### applicationOverviewIssuesSchema

This list of issues that might be wrong with the application

- `missingStrategies` (list of string, required) — The list of strategies that are missing from Unleash

### applicationEnvironmentIssuesSchema

This list of issues that might be wrong with the application

- `missingFeatures` (list of string, required) — The list of features that are missing in Unleash
- `outdatedSdks` (list of string, required) — The list of used SDKs that are outdated

## Examples

**Response**

```json
{
  "projects": [
    "default",
    "payment"
  ],
  "featureCount": 5,
  "environments": [
    {
      "name": "production",
      "instanceCount": 5,
      "sdks": [
        "unleash-client-node:5.4.0",
        "unleash-client-node:5.3.0"
      ],
      "frontendSdks": [
        "unleash-client-js:3.7.5"
      ],
      "backendSdks": [
        "unleash-client-node:5.4.0"
      ],
      "lastSeen": "2023-04-19T08:15:14.000Z",
      "issues": {
        "missingFeatures": [
          "feature1",
          "feature2"
        ],
        "outdatedSdks": [
          "unleash-client-node:5.4.0",
          "unleash-client-node:5.3.0"
        ]
      }
    }
  ],
  "issues": {
    "missingStrategies": [
      "feature1",
      "feature2"
    ]
  }
}
```

**SDK Code**

```python
import requests

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

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

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

print(response.json())
```

```javascript
const url = 'https://app.unleash-instance.example.com/api/admin/metrics/applications/appName/overview';
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/applications/appName/overview"

	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/applications/appName/overview")

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/applications/appName/overview")
  .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/applications/appName/overview', [
  'headers' => [
    'Authorization' => '<apiKey>',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://app.unleash-instance.example.com/api/admin/metrics/applications/appName/overview");
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/applications/appName/overview")! 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()
```