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# Validate an external impact-metrics source URL.

POST https://app.unleash-instance.example.com/api/admin/impact-metrics/external-source/validate
Content-Type: application/json

**Enterprise feature**

Tests an external impact-metrics source URL on the fly without persisting it. Returns the list of metric names found at the URL on success, or an `error` string explaining what went wrong. Always responds with 200; failures are reported in the body.

Reference: https://docs.getunleash.io/api/validate-external-impact-metrics-source

## 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

### Body (application/json)

- `url` (string, required) — Base URL of the external impact-metrics source to test. Basic-Auth credentials may be embedded in the URL (e.g. `https://user:pass@metrics.example.com`); they are extracted into an `Authorization` header on outbound requests.

## Response

### 200

validateExternalImpactMetricsSourceResultSchema

- `metrics` (list of string, required) — List of metric names discovered at the supplied URL. Empty when the URL could not be validated.
- `error` (string, optional) — Human-readable explanation of why the URL could not be validated. Omitted on success.

## Examples

**Request**

```json
{
  "url": "https://metrics.example.com"
}
```

**Response**

```json
{
  "metrics": [
    "http_requests_total",
    "process_cpu_seconds_total"
  ],
  "error": "External source returned HTTP 401"
}
```

**SDK Code**

```python
import requests

url = "https://app.unleash-instance.example.com/api/admin/impact-metrics/external-source/validate"

payload = { "url": "https://metrics.example.com" }
headers = {
    "Authorization": "<apiKey>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://app.unleash-instance.example.com/api/admin/impact-metrics/external-source/validate';
const options = {
  method: 'POST',
  headers: {Authorization: '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"url":"https://metrics.example.com"}'
};

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"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://app.unleash-instance.example.com/api/admin/impact-metrics/external-source/validate"

	payload := strings.NewReader("{\n  \"url\": \"https://metrics.example.com\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "<apiKey>")
	req.Header.Add("Content-Type", "application/json")

	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/impact-metrics/external-source/validate")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"url\": \"https://metrics.example.com\"\n}"

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.post("https://app.unleash-instance.example.com/api/admin/impact-metrics/external-source/validate")
  .header("Authorization", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"url\": \"https://metrics.example.com\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://app.unleash-instance.example.com/api/admin/impact-metrics/external-source/validate', [
  'body' => '{
  "url": "https://metrics.example.com"
}',
  'headers' => [
    'Authorization' => '<apiKey>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://app.unleash-instance.example.com/api/admin/impact-metrics/external-source/validate");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"url\": \"https://metrics.example.com\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = ["url": "https://metrics.example.com"] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://app.unleash-instance.example.com/api/admin/impact-metrics/external-source/validate")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

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()
```