> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://platform.bctrl.ai/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://platform.bctrl.ai/_mcp/server.

# List spaces

GET https://api.bctrl.ai/v1/spaces

List complete spaces visible to the current API key.

Reference: https://platform.bctrl.ai/api/api-reference/spaces/list

## Authentication

- `Authorization` header (bearer token, required) — Use Bearer \<api-key>.

## Servers

- `https://api.bctrl.ai` (Production, default)
- `http://localhost:8787` (Local development gateway)

## Request

### Query parameters

- `cursor` (string, optional)
- `limit` (integer, optional, default: 50)

### Headers

- `BCTRL-Subaccount-Id` (string, optional) — Optional effective subaccount context for organization API keys. Subaccount API keys are already scoped and cannot use this header to act as another subaccount.

## Response

### 200

OK

- `data` (list of object, required)
  - `createdAt` (datetime, required) — RFC 3339 timestamp with a UTC offset.
  - `environment` (object, required)
    - `ai` (object, optional)
      - `credentialIds` (list of string, optional)
      - `default` (string or object, optional)
        - AiStoredModelSelection
          - `model` (string, required)
          - `auth` ("managed" or any, optional)
          - `cache_control` (object, optional)
            - `type` ("ephemeral", required)
            - `ttl` (enum, optional)
          - `debug` (object, optional)
          - `frequency_penalty` (double, optional)
          - `include_reasoning` (boolean, optional)
          - `logit_bias` (object, optional)
          - `logprobs` (boolean, optional)
          - `max_completion_tokens` (integer, optional)
          - `max_tokens` (integer, optional)
          - `maxTokens` (integer, optional)
          - `metadata` (object, optional)
          - `min_p` (double, optional)
          - `models` (list of string, optional)
          - `parallel_tool_calls` (boolean, optional)
          - `plugins` (list of object, optional)
          - `prediction` (object, optional)
          - `presence_penalty` (double, optional)
          - `provider` (enum, optional)
            - Allowed values: `openai`, `anthropic`, `google`, `azure`, `groq`, `deepseek`, `mistral`, `cerebras`, `openrouter`, `xai`, `perplexity`, `togetherai`, `vercel-ai-gateway`, `custom`
          - `reasoning` (object, optional)
          - `reasoning_effort` (enum, optional)
            - Allowed values: `none`, `minimal`, `low`, `medium`, `high`, `xhigh`, `max`
          - `reasoningEffort` (enum, optional)
            - Allowed values: `none`, `minimal`, `low`, `medium`, `high`, `xhigh`, `max`
          - `repetition_penalty` (double, optional)
          - `request` (object, optional)
            - `cache_control` (object, optional)
            - `debug` (object, optional)
            - `frequency_penalty` (double, optional)
            - `include_reasoning` (boolean, optional)
            - `logit_bias` (object, optional)
            - `logprobs` (boolean, optional)
            - `max_completion_tokens` (integer, optional)
            - `max_tokens` (integer, optional)
            - `metadata` (object, optional)
            - `min_p` (double, optional)
            - `models` (list of string, optional)
            - `parallel_tool_calls` (boolean, optional)
            - `plugins` (list of object, optional)
            - `prediction` (object, optional)
            - `presence_penalty` (double, optional)
            - `provider` (object, optional)
            - `reasoning` (object, optional)
            - `reasoning_effort` (enum, optional)
            - `repetition_penalty` (double, optional)
            - `response_format` (object, optional)
            - `route` ("fallback", optional)
            - `seed` (integer, optional)
            - `stop` (string or list of string, optional)
            - `stream` (boolean, optional)
            - `structured_outputs` (boolean, optional)
            - `temperature` (double, optional)
            - `tool_choice` (string or object, optional)
            - `tools` (list of object, optional)
            - `top_a` (double, optional)
            - `top_k` (integer, optional)
            - `top_logprobs` (integer, optional)
            - `top_p` (double, optional)
            - `user` (string, optional)
            - `verbosity` (enum, optional)
            - `web_search_options` (object, optional)
          - `response_format` (object, optional)
          - `responseFormat` (enum, optional)
            - Allowed values: `text`, `json`
          - `responseSchema` (object, optional)
          - `route` ("fallback", optional)
          - `seed` (integer, optional)
          - `stop` (string or list of string, optional)
          - `stream` (boolean, optional)
          - `structured_outputs` (boolean, optional)
          - `temperature` (double, optional)
          - `thinkingBudgetTokens` (integer, optional)
          - `tool_choice` (string or object, optional)
            - JsonObject
          - `tools` (list of object, optional)
          - `top_a` (double, optional)
          - `top_k` (integer, optional)
          - `top_logprobs` (integer, optional)
          - `top_p` (double, optional)
          - `topP` (double, optional)
          - `user` (string, optional)
          - `verbosity` (enum, optional)
            - Allowed values: `low`, `medium`, `high`, `xhigh`, `max`
          - `web_search_options` (object, optional)
    - `storage` (object, optional)
      - `namespace` (string, required)
    - `vault` (object, optional)
      - `allow` (list of string, optional)
      - `allowRawReads` (boolean, optional)
      - `deny` (list of string, optional)
  - `id` (string, required) — Unique space identifier generated by BCTRL.
  - `isDefault` (boolean, required)
  - `name` (string, required)
  - `region` (enum, required)
    - Allowed values: `us-east-1`
  - `updatedAt` (datetime, required) — RFC 3339 timestamp with a UTC offset.
- `nextCursor` (string, required, nullable)

## Examples

**Response**

```json
{
  "data": [
    {
      "createdAt": "2026-07-26T12:00:00Z",
      "environment": {
        "ai": {
          "credentialIds": [
            "string"
          ],
          "default": "string"
        },
        "storage": {
          "namespace": "string"
        },
        "vault": {
          "allow": [
            "string"
          ],
          "allowRawReads": true,
          "deny": [
            "string"
          ]
        }
      },
      "id": "sp_AAAAAAAAAAAAAAAAAAAAAA",
      "isDefault": true,
      "name": "string",
      "region": "us-east-1",
      "updatedAt": "2026-07-26T12:00:00Z"
    }
  ],
  "nextCursor": "string"
}
```

**SDK Code**

```python
import requests

url = "https://api.bctrl.ai/v1/spaces"

headers = {"Authorization": "Bearer <token>"}

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

print(response.json())
```

```javascript
const url = 'https://api.bctrl.ai/v1/spaces';
const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

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://api.bctrl.ai/v1/spaces"

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

	req.Header.Add("Authorization", "Bearer <token>")

	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://api.bctrl.ai/v1/spaces")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

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://api.bctrl.ai/v1/spaces")
  .header("Authorization", "Bearer <token>")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.bctrl.ai/v1/spaces', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.bctrl.ai/v1/spaces");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.bctrl.ai/v1/spaces")! 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()
```