> 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/get-open-invoices-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.

# Get current draft invoice usage

GET https://api.mixlayer.com/v1/billing_accounts/{billing_account_id}/usage/current

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

Reference: https://docs.mixlayer.com/api-reference/platform-api/billing-accounts/get-open-invoices-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

## Response

### 200

Current draft invoices

- `data` (list of ApiDataResponseVecSimpleInvoiceDataItems, required) — Response payload.

## Errors

### 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

Billing account not found

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

### 500 Internal Server Error

An unexpected server or database error occurred.

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

## Types

### ApiDataResponseVecSimpleInvoiceDataItems

Current draft invoice with charges grouped by model.

- `end_date` (string, required) — Last date covered by the invoice, formatted as `YYYY-MM-DD`.
- `line_item_groups` (list of SimpleInvoiceLineItemGroup, required) — Invoice line items grouped by model.
- `start_date` (string, required) — First date covered by the invoice, formatted as `YYYY-MM-DD`.
- `subtotal_cents` (double, required) — Usage charges before credits, in cents.
- `total_amount_cents` (double, required) — Net invoice total after credits, in cents.
- `total_applied_credits_cents` (double, required) — Credits applied to the invoice, represented as a negative cent amount.

### 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.

### SimpleInvoiceLineItemGroup

Invoice line items for one model.

- `line_items` (list of SimpleInvoiceLineItem, required) — Charges and credits in the group.
- `total_cents` (double, required) — Net group total in cents.
- `model` (string, optional, nullable) — Model SKU, or null for charges not attributed to a model.

### SimpleInvoiceLineItem

One usage charge or credit on an invoice.

- `credit_applied_cents` (double, required) — Credit applied by this line, in cents.
- `description` (string, required) — Human-readable line item name.
- `quantity` (double, required) — Billed usage quantity.
- `total_price_cents` (double, required) — Line total in cents.
- `unit_price_cents` (double, required) — Unit price in cents.

## Examples

**Response**

```json
{
  "data": [
    {
      "end_date": "string",
      "line_item_groups": [
        {
          "line_items": [
            {
              "credit_applied_cents": 1.1,
              "description": "string",
              "quantity": 1.1,
              "total_price_cents": 1.1,
              "unit_price_cents": 1.1
            }
          ],
          "total_cents": 1.1,
          "model": "string"
        }
      ],
      "start_date": "string",
      "subtotal_cents": 1.1,
      "total_amount_cents": 1.1,
      "total_applied_credits_cents": 1.1
    }
  ]
}
```

**SDK Code**

```python
import requests

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

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

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

print(response.json())
```

```javascript
const url = 'https://api.mixlayer.com/v1/billing_accounts/billing_account_id/usage/current';
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.mixlayer.com/v1/billing_accounts/billing_account_id/usage/current"

	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.mixlayer.com/v1/billing_accounts/billing_account_id/usage/current")

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.mixlayer.com/v1/billing_accounts/billing_account_id/usage/current")
  .header("Authorization", "Bearer <token>")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.mixlayer.com/v1/billing_accounts/billing_account_id/usage/current', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

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