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# List shard keys

GET http://localhost:6333/collections/{collection_name}/shards

Reference: https://api.qdrant.tech/api-reference/distributed/list-shard-keys

## Authentication

- `api-key` header (required) — API Key authentication via header

## Servers

- `http://localhost:6333` (http, default)
- `https://localhost:6333` (https)

## Request

### Path parameters

- `collection_name` (string, required) — Name of the collection to list shard keys for

## Response

### 200

successful operation

- `usage` (CollectionsCollectionNameShardsGetResponsesContentApplicationJsonSchemaUsage, optional)
- `time` (double, optional) — Time spent to process this request
- `status` (string, optional)
- `result` (ShardKeysResponse, optional)

## Types

### CollectionsCollectionNameShardsGetResponsesContentApplicationJsonSchemaUsage

### ShardKeysResponse

- `shard_keys` (list of ShardKeyDescription, optional, nullable) — The existing shard keys. Only available when sharding method is `custom`

### Usage

Usage of the hardware resources, spent to process the request

- `hardware` (UsageHardware, optional)
- `inference` (UsageInference, optional)

### ShardKeyDescription

- `key` (ShardKey, required)

### UsageHardware

### UsageInference

### ShardKey

### HardwareUsage

Usage of the hardware resources, spent to process the request

- `cpu` (integer, required)
- `payload_io_read` (integer, required)
- `payload_io_write` (integer, required)
- `payload_index_io_read` (integer, required)
- `payload_index_io_write` (integer, required)
- `vector_io_read` (integer, required)
- `vector_io_write` (integer, required)

### InferenceUsage

- `models` (map from string to ModelUsage, required)

### ModelUsage

- `tokens` (uint64, required)

## Examples

**Response**

```json
{
  "usage": {
    "hardware": {
      "cpu": 1,
      "payload_io_read": 1,
      "payload_io_write": 1,
      "payload_index_io_read": 1,
      "payload_index_io_write": 1,
      "vector_io_read": 1,
      "vector_io_write": 1
    },
    "inference": {
      "models": {}
    }
  },
  "time": 0.002,
  "status": "ok",
  "result": {
    "shard_keys": [
      {
        "key": "region_1"
      }
    ]
  }
}
```

**SDK Code**

```python
import requests

url = "http://localhost:6333/collections/collection_name/shards"

headers = {"api-key": "<apiKey>"}

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

print(response.json())
```

```javascript
const url = 'http://localhost:6333/collections/collection_name/shards';
const options = {method: 'GET', headers: {'api-key': '<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 := "http://localhost:6333/collections/collection_name/shards"

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

	req.Header.Add("api-key", "<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("http://localhost:6333/collections/collection_name/shards")

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

request = Net::HTTP::Get.new(url)
request["api-key"] = '<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("http://localhost:6333/collections/collection_name/shards")
  .header("api-key", "<apiKey>")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'http://localhost:6333/collections/collection_name/shards', [
  'headers' => [
    'api-key' => '<apiKey>',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("http://localhost:6333/collections/collection_name/shards");
var request = new RestRequest(Method.GET);
request.AddHeader("api-key", "<apiKey>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["api-key": "<apiKey>"]

let request = NSMutableURLRequest(url: NSURL(string: "http://localhost:6333/collections/collection_name/shards")! 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()
```