> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.mixlayer.com/api-reference/platform-api/billing-accounts/set-auto-refill-for-billing-account/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.mixlayer.com/_mcp/server.

# Enable or update automatic prepaid refills

PUT https://api.mixlayer.com/v1/billing_accounts/{billing_account_id}/auto_refill
Content-Type: application/json

When authenticated with an API key, this operation requires `api-admin`.

Reference: https://docs.mixlayer.com/api-reference/platform-api/billing-accounts/set-auto-refill-for-billing-account

## Authentication

- `Authorization` header (bearer token, required) — Console user session or Mixlayer API key supplied as a Bearer token.

## Request

### Path parameters

- `billing_account_id` (string, required) — Billing account ID

### Body (application/json)

This endpoint expects a SetAutoRefillRequest.

- `recharge_to_cents` (long, required) — Target balance after auto-refill. Must be at least 1,000 cents greater than `threshold_cents` and no more than 50,000.
- `threshold_cents` (long, required) — Balance threshold in cents that triggers auto-refill. Must be at least 500.

## Response

### 200

Automatic refill configuration

- `data` (ApiDataResponseAutoRefillResponseData, required) — Result of enabling, updating, or disabling automatic refills.

## Errors

### 400 Bad Request Error

The request body contains malformed JSON or invalid values.

- `error` (ApiErrorBody, required) — Structured error details.

### 401 Unauthorized Error

Authentication is missing or invalid.

- `error` (ApiErrorBody, required) — Structured error details.

### 403 Forbidden Error

The authenticated principal cannot perform this operation.

- `error` (ApiErrorBody, required) — Structured error details.

### 404 Not Found Error

The requested resource is not visible to the authenticated principal.

- `error` (ApiErrorBody, required) — Structured error details.

### 409 Conflict Error

The billing account state prevents the requested operation.

- `error` (ApiErrorBody, required) — Structured error details.

### 413 Content Too Large Error

The request body exceeds the configured size limit.

- `error` (ApiErrorBody, required) — Structured error details.

### 415 Unsupported Media Type Error

The request does not have a JSON content type.

- `error` (ApiErrorBody, required) — Structured error details.

### 422 Unprocessable Entity Error

The JSON body does not match the request schema or contains a rejected field value.

- `error` (ApiErrorBody, required) — Structured error details.

### 500 Internal Server Error

An unexpected server or database error occurred.

- `error` (ApiErrorBody, required) — Structured error details.

## Types

### ApiDataResponseAutoRefillResponseData

Result of enabling, updating, or disabling automatic refills.

- `enabled` (boolean, required) — Whether automatic refills are enabled.
- `idempotency_key` (string, required) — Idempotency key associated with the configuration update.
- `recharge_to_cents` (long, optional, nullable) — Target balance after a refill, in cents.
- `threshold_cents` (long, optional, nullable) — Balance threshold that triggers a refill, in cents.

### ApiErrorBody

Structured error details returned by the platform API.

- `message` (string, required) — Human-readable error message.
- `code` (string, optional, nullable) — Stable machine-readable error code, when available.
- `details` (any, optional) — Error-specific structured context, when available.

## Examples

**Request**

```json
{
  "recharge_to_cents": 1,
  "threshold_cents": 1
}
```

**Response**

```json
{
  "data": {
    "enabled": true,
    "idempotency_key": "string",
    "recharge_to_cents": 1,
    "threshold_cents": 1
  }
}
```

**SDK Code**

```python
import requests

url = "https://api.mixlayer.com/v1/billing_accounts/billing_account_id/auto_refill"

payload = {
    "recharge_to_cents": 1,
    "threshold_cents": 1
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://api.mixlayer.com/v1/billing_accounts/billing_account_id/auto_refill';
const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"recharge_to_cents":1,"threshold_cents":1}'
};

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.mixlayer.com/v1/billing_accounts/billing_account_id/auto_refill"

	payload := strings.NewReader("{\n  \"recharge_to_cents\": 1,\n  \"threshold_cents\": 1\n}")

	req, _ := http.NewRequest("PUT", 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.mixlayer.com/v1/billing_accounts/billing_account_id/auto_refill")

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

request = Net::HTTP::Put.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"recharge_to_cents\": 1,\n  \"threshold_cents\": 1\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.put("https://api.mixlayer.com/v1/billing_accounts/billing_account_id/auto_refill")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"recharge_to_cents\": 1,\n  \"threshold_cents\": 1\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('PUT', 'https://api.mixlayer.com/v1/billing_accounts/billing_account_id/auto_refill', [
  'body' => '{
  "recharge_to_cents": 1,
  "threshold_cents": 1
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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