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

# List brains

GET https://api.livingbrain.com/v1/brains

List every brain owned by the calling subject, most recently updated first.

Reference: https://docs.livingbrain.com/api-reference/brains/list

## Authentication

- `x-api-key` header (required) — Your Living Brain API key. Create one from the dashboard; keys are scoped to an organization and carry the role of the member they were issued to.

## Response

### 200

- `list of BrainDto`

## Errors

### 400 Bad Request Error

Validation failed

- `statusCode` (integer, required) — HTTP status code
- `timestamp` (string, required) — ISO timestamp of the failure
- `path` (string, required) — Request path (query string stripped)
- `message` (string, required) — Human-readable error message
- `body` (ErrorResDtoBody, optional) — Original framework exception response when available, e.g. `{ statusCode, message, error }` with per-field validation messages

### 401 Unauthorized Error

Unauthorized

- `statusCode` (integer, required) — HTTP status code
- `timestamp` (string, required) — ISO timestamp of the failure
- `path` (string, required) — Request path (query string stripped)
- `message` (string, required) — Human-readable error message
- `body` (ErrorResDtoBody, optional) — Original framework exception response when available, e.g. `{ statusCode, message, error }` with per-field validation messages

## Types

### BrainDto

- `id` (string, required) — Brain id
- `tenantId` (string, required) — Owning tenant id
- `subjectId` (string, required) — Owning subject id (host-defined)
- `name` (string, required) — User-facing name
- `slug` (string, required) — URL-safe identifier, unique per (tenant, subject)
- `description` (string, required) — Description
- `briefSettings` (BrainBriefSettingsResDto, required, nullable) — Daily-brief schedule and delivery settings for this brain.
- `createdAt` (datetime, required) — ISO 8601 timestamp of when this record was created.
- `updatedAt` (datetime, required) — ISO 8601 timestamp of when this record was last modified.

### ErrorResDtoBody

Original framework exception response when available, e.g. `{ statusCode, message, error }` with per-field validation messages

### BrainBriefSettingsResDto

- `enabled` (boolean, required) — Generate a daily brief for this brain
- `hourLocal` (integer, required) — Local-time hour the brief should fire
- `timezone` (string, required) — IANA timezone
- `lastBriefDate` (string, required, nullable) — ISO date (YYYY-MM-DD) of the last generated brief

## Examples

**Response**

```json
[
  {
    "id": "string",
    "tenantId": "string",
    "subjectId": "string",
    "name": "string",
    "slug": "string",
    "description": "string",
    "briefSettings": {
      "enabled": true,
      "hourLocal": 7,
      "timezone": "Europe/Helsinki",
      "lastBriefDate": "string"
    },
    "createdAt": "2024-01-15T09:30:00Z",
    "updatedAt": "2024-01-15T09:30:00Z"
  }
]
```

**SDK Code**

```python
import requests

url = "https://api.livingbrain.com/v1/brains"

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

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

print(response.json())
```

```javascript
const url = 'https://api.livingbrain.com/v1/brains';
const options = {method: 'GET', headers: {'x-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 := "https://api.livingbrain.com/v1/brains"

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

	req.Header.Add("x-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("https://api.livingbrain.com/v1/brains")

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

request = Net::HTTP::Get.new(url)
request["x-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("https://api.livingbrain.com/v1/brains")
  .header("x-api-key", "<apiKey>")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.livingbrain.com/v1/brains', [
  'headers' => [
    'x-api-key' => '<apiKey>',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.livingbrain.com/v1/brains");
var request = new RestRequest(Method.GET);
request.AddHeader("x-api-key", "<apiKey>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.livingbrain.com/v1/brains")! 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()
```