> ## Documentation Index
> Fetch the complete documentation index at: https://docs.grantex.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Usage History

> Retrieve daily usage breakdown over a specified number of days.

## Endpoint

```
GET /v1/usage/history
```

## Authentication

Requires a developer API key in the `Authorization` header.

## Request Headers

| Header          | Value              |
| --------------- | ------------------ |
| `Authorization` | `Bearer <api_key>` |

## Query Parameters

| Parameter | Type     | Required | Description                                              |
| --------- | -------- | -------- | -------------------------------------------------------- |
| `days`    | `number` | No       | Number of days to look back (default `30`, maximum `90`) |

## Example Request

```bash theme={null}
curl "https://grantex-auth-dd4mtrt2gq-uc.a.run.app/v1/usage/history?days=7" \
  -H "Authorization: Bearer gx_..."
```

## Response -- 200 OK

```json theme={null}
{
  "developerId": "dev_01HXYZ...",
  "days": 7,
  "entries": [
    {
      "date": "2026-04-05",
      "tokenExchanges": 142,
      "authorizations": 58,
      "verifications": 1203,
      "totalRequests": 1403
    },
    {
      "date": "2026-04-04",
      "tokenExchanges": 130,
      "authorizations": 45,
      "verifications": 1100,
      "totalRequests": 1275
    }
  ]
}
```

## Response Fields

| Field                      | Type     | Description                                             |
| -------------------------- | -------- | ------------------------------------------------------- |
| `developerId`              | `string` | The authenticated developer's ID                        |
| `days`                     | `number` | The number of days included in the response             |
| `entries`                  | `array`  | Array of daily usage entries, sorted by date descending |
| `entries[].date`           | `string` | Date in `YYYY-MM-DD` format                             |
| `entries[].tokenExchanges` | `number` | Number of token exchange requests that day              |
| `entries[].authorizations` | `number` | Number of authorization requests that day               |
| `entries[].verifications`  | `number` | Number of token verification requests that day          |
| `entries[].totalRequests`  | `number` | Sum of all request types for that day                   |

<Note>
  Historical usage data is read from PostgreSQL. Days with no activity may be omitted from the response.
</Note>

## Error Responses

| Status | Code           | Description                |
| ------ | -------------- | -------------------------- |
| 401    | `UNAUTHORIZED` | Invalid or missing API key |

## SDK Examples

<CodeGroup>
  ```typescript TypeScript theme={null}
  import Grantex from '@grantex/sdk';

  const grantex = new Grantex({ apiKey: 'gx_...' });

  const history = await grantex.usage.history({ days: 7 });
  for (const entry of history.entries) {
    console.log(`${entry.date}: ${entry.totalRequests} requests`);
  }
  ```

  ```python Python theme={null}
  from grantex import Grantex

  grantex = Grantex(api_key="gx_...")

  history = grantex.usage.history(days=7)
  for entry in history.entries:
      print(f"{entry.date}: {entry.total_requests} requests")
  ```
</CodeGroup>