> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://api.qdrant.tech/v-1-13-x/api-reference/collections/get-collections/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://api.qdrant.tech/_mcp/server.

# List all collections

GET http://localhost:6333/collections

Returns a list of all existing collections.

Reference: https://api.qdrant.tech/api-reference/collections/get-collections

## Authentication

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

## Servers

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

## Response

### 200

successful operation

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

## Types

### CollectionsGetResponsesContentApplicationJsonSchemaUsage

### CollectionsResponse

- `collections` (list of CollectionDescription, required)

### HardwareUsage

Usage of the hardware resources, spent to process the request

- `cpu` (integer, required)
- `io_read` (integer, required)
- `io_write` (integer, required)

### CollectionDescription

- `name` (string, required)

## Examples

**Response**

```json
{
  "usage": {
    "cpu": 1,
    "io_read": 1,
    "io_write": 1
  },
  "time": 0.002,
  "status": "ok",
  "result": {
    "collections": [
      {
        "name": "string"
      }
    ]
  }
}
```

**SDK Code**

```csharp
using Qdrant.Client;

var client = new QdrantClient("localhost", 6334);

await client.ListCollectionsAsync();

```

```rust
use qdrant_client::Qdrant;

let client = Qdrant::from_url("http://localhost:6334").build()?;

client.list_collections().await?;

```

```python
from qdrant_client import QdrantClient

client = QdrantClient(url="http://localhost:6333")

client.get_collections()

```

```java
import io.qdrant.client.QdrantClient;
import io.qdrant.client.QdrantGrpcClient;

QdrantClient client = new QdrantClient(
                QdrantGrpcClient.newBuilder("localhost", 6334, false).build());

client.listCollectionsAsync().get();

```

```go
package client

import (
	"context"
	"fmt"

	"github.com/qdrant/go-client/qdrant"
)

func listCollections() {
	client, err := qdrant.NewClient(&qdrant.Config{
		Host: "localhost",
		Port: 6334,
	})
	if err != nil {
		panic(err)
	}

	collections, err := client.ListCollections(context.Background())
	if err != nil {
		panic(err)
	}
	fmt.Println("Collections: ", collections)
}

```

```typescript
import { QdrantClient } from "@qdrant/js-client-rest";

const client = new QdrantClient({ host: "localhost", port: 6333 });

client.getCollections();

```

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

url = URI("http://localhost:6333/collections")

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
```

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

$client = new \GuzzleHttp\Client();

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

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

```swift
import Foundation

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

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