## Get usage history

`client.AIGateway.Billing.UsageHistory(ctx, params) (*BillingUsageHistoryResponse, error)`

**get** `/accounts/{account_id}/ai-gateway/billing/usage-history`

Retrieve aggregated usage meter event summaries for the given time range.

### Parameters

- `params BillingUsageHistoryParams`

  - `AccountID param.Field[string]`

    Path param: Cloudflare account ID.

  - `ValueGroupingWindow param.Field[BillingUsageHistoryParamsValueGroupingWindow]`

    Query param: Grouping window for usage data.

    - `const BillingUsageHistoryParamsValueGroupingWindowDay BillingUsageHistoryParamsValueGroupingWindow = "day"`

    - `const BillingUsageHistoryParamsValueGroupingWindowHour BillingUsageHistoryParamsValueGroupingWindow = "hour"`

  - `EndTime param.Field[float64]`

    Query param: End time as Unix timestamp in milliseconds.

  - `StartTime param.Field[float64]`

    Query param: Start time as Unix timestamp in milliseconds.

### Returns

- `type BillingUsageHistoryResponse struct{…}`

  - `History []BillingUsageHistoryResponseHistory`

    - `ID string`

    - `AggregatedValue float64`

    - `EndTime float64`

    - `StartTime float64`

### Example

```go
package main

import (
  "context"
  "fmt"

  "github.com/cloudflare/cloudflare-go"
  "github.com/cloudflare/cloudflare-go/ai_gateway"
  "github.com/cloudflare/cloudflare-go/option"
)

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  response, err := client.AIGateway.Billing.UsageHistory(context.TODO(), ai_gateway.BillingUsageHistoryParams{
    AccountID: cloudflare.F("account_id"),
    ValueGroupingWindow: cloudflare.F(ai_gateway.BillingUsageHistoryParamsValueGroupingWindowDay),
  })
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", response.History)
}
```

#### Response

```json
{
  "errors": [
    {
      "code": 0,
      "message": "message"
    }
  ],
  "messages": [
    {
      "code": 0,
      "message": "message"
    }
  ],
  "result": {
    "history": [
      {
        "id": "id",
        "aggregated_value": 0,
        "end_time": 0,
        "start_time": 0
      }
    ]
  },
  "success": true,
  "result_info": {
    "has_more": true,
    "page": 0,
    "per_page": 0,
    "total_count": 0
  }
}
```