# Validate a feature flag name.

POST https://app.unleash-instance.example.com/api/admin/features/validate
Content-Type: application/json

Validates a feature flag name: checks whether the name is URL-friendly and whether a feature with the given name already exists. Returns 200 if the feature name is compliant and unused.

Reference: https://docs.getunleash.io/api/validate-feature

## OpenAPI Specification

```yaml
openapi: 3.1.1
info:
  title: Validate a feature flag name.
  version: endpoint_features.validateFeature
paths:
  /api/admin/features/validate:
    post:
      operationId: validate-feature
      summary: Validate a feature flag name.
      description: >-
        Validates a feature flag name: checks whether the name is URL-friendly
        and whether a feature with the given name already exists. Returns 200 if
        the feature name is compliant and unused.
      tags:
        - - subpackage_features
      parameters:
        - name: Authorization
          in: header
          description: Header authentication of the form `undefined <token>`
          required: true
          schema:
            type: string
      responses:
        '200':
          description: This response has no body.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Features_validateFeature_Response_200'
        '400':
          description: The request data does not match what we expect.
          content: {}
        '401':
          description: >-
            Authorization information is missing or invalid. Provide a valid API
            token as the `authorization` header, e.g.
            `authorization:*.*.my-admin-token`.
          content: {}
        '409':
          description: >-
            The provided resource can not be created or updated because it would
            conflict with the current state of the resource or with an already
            existing resource, respectively.
          content: {}
        '415':
          description: >-
            The operation does not support request payloads of the provided
            type. Please ensure that you're using one of the listed payload
            types and that you have specified the right content type in the
            "content-type" header.
          content: {}
      requestBody:
        description: validateFeatureSchema
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/validateFeatureSchema'
components:
  schemas:
    validateFeatureSchema:
      type: object
      properties:
        name:
          type: string
          description: The feature name to validate.
        projectId:
          type:
            - string
            - 'null'
          description: >-
            The id of the project that the feature flag will belong to. If the
            target project has a feature naming pattern defined, the name will
            be validated against that pattern.
      required:
        - name
    Features_validateFeature_Response_200:
      type: object
      properties: {}

```

## SDK Code Examples

```python
import requests

url = "https://app.unleash-instance.example.com/api/admin/features/validate"

payload = { "name": "my-feature-3" }
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/features/validate';
const options = {
  method: 'POST',
  headers: {Authorization: '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"name":"my-feature-3"}'
};

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/features/validate"

	payload := strings.NewReader("{\n  \"name\": \"my-feature-3\"\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/features/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  \"name\": \"my-feature-3\"\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/features/validate")
  .header("Authorization", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"my-feature-3\"\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/features/validate', [
  'body' => '{
  "name": "my-feature-3"
}',
  '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/features/validate");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"name\": \"my-feature-3\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = ["name": "my-feature-3"] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://app.unleash-instance.example.com/api/admin/features/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()
```