> 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.

# Create a subaccount

POST https://api.bctrl.ai/v1/subaccounts
Content-Type: application/json

Create a subaccount for a tenant, customer, environment, or team. Optional limits can be provided inline.

Reference: https://platform.bctrl.ai/api/api-reference/account/subaccounts-create

## Authentication

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

## Servers

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

## Request

### Body (application/json)

- `name` (string, required)
- `externalId` (string, optional)
- `limits` (object, optional)
  - `maxActiveRuns` (integer, optional, nullable)
  - `maxSpaces` (integer, optional, nullable)
  - `monthlyCreditLimit` (double, optional, nullable)
- `metadata` (object, optional)

## Response

### 201

Created

- `createdAt` (string, required)
- `defaultSpaceId` (string, required)
- `id` (string, required) — Opaque identifier for a BCTRL subaccount.
- `limits` (object, required)
  - `maxActiveRuns` (integer, required, nullable)
  - `maxSpaces` (integer, required, nullable)
  - `monthlyCreditLimit` (double, required, nullable)
- `name` (string, required) — Customer-facing resource name. 1–200 characters.
- `status` (enum, required)
  - Allowed values: `active`, `archived`
- `updatedAt` (string, required)
- `archivedAt` (string, optional, nullable)
- `externalId` (string, optional, nullable)
- `metadata` (object, optional, nullable)
- `usage` (object, optional)
  - `computedAt` (datetime, required) — RFC 3339 timestamp with a UTC offset.
  - `credits` (object, required)
    - `limit` (double, required, nullable)
    - `used` (double, required)
  - `period` (object, required)
    - `endsAt` (datetime, required) — RFC 3339 timestamp with a UTC offset.
    - `startedAt` (datetime, required) — RFC 3339 timestamp with a UTC offset.
  - `runs` (object, required)
    - `active` (integer, required)
    - `limit` (integer, required, nullable)
  - `spaces` (object, required)
    - `limit` (integer, required, nullable)
    - `used` (integer, required)
  - `subaccountId` (string, required) — Opaque identifier for a BCTRL subaccount.

## Examples

**Request**

```json
{
  "name": "string"
}
```

**Response**

```json
{
  "createdAt": "string",
  "defaultSpaceId": "string",
  "id": "V1StGXR8_Z5jdHi6B-myT",
  "limits": {
    "maxActiveRuns": 1,
    "maxSpaces": 1,
    "monthlyCreditLimit": 1.1
  },
  "name": "Production browser",
  "status": "active",
  "updatedAt": "string",
  "archivedAt": "string",
  "externalId": "string",
  "metadata": {},
  "usage": {
    "computedAt": "2026-07-26T12:00:00Z",
    "credits": {
      "limit": 1.1,
      "used": 1.1
    },
    "period": {
      "endsAt": "2026-07-26T12:00:00Z",
      "startedAt": "2026-07-26T12:00:00Z"
    },
    "runs": {
      "active": 1,
      "limit": 1
    },
    "spaces": {
      "limit": 1,
      "used": 1
    },
    "subaccountId": "V1StGXR8_Z5jdHi6B-myT"
  }
}
```

**SDK Code**

```python
import requests

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

payload = { "name": "string" }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://api.bctrl.ai/v1/subaccounts';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"name":"string"}'
};

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

	payload := strings.NewReader("{\n  \"name\": \"string\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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://api.bctrl.ai/v1/subaccounts")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"string\"\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://api.bctrl.ai/v1/subaccounts")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"string\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.bctrl.ai/v1/subaccounts', [
  'body' => '{
  "name": "string"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.bctrl.ai/v1/subaccounts");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"name\": \"string\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = ["name": "string"] as [String : Any]

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

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