# List usage

URL: https://docs.hanzo.ai/docs/openapi/o11y/get-o11y-usage

> Returns ingestion usage counts bucketed over the requested window, optionally narrowed to one service.

`GET /v1/o11y/usage`

> [O11y →](https://docs.hanzo.ai/docs/openapi/o11y) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides)

|               |                                        |
| ------------- | -------------------------------------- |
| **Address**   | `https://api.hanzo.ai/v1/o11y/usage`   |
| **Method**    | `GET`                                  |
| **Operation** | `get_o11y_usage`                       |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY` |

Returns ingestion usage counts bucketed over the requested window,
optionally narrowed to one service.

Callers need the viewer role; the runtime's own gate enforces it.

## Request

4 fields.

| Field     | In    | Type    | Required | Description                                      |
| --------- | ----- | ------- | -------- | ------------------------------------------------ |
| `start`   | query | string  | yes      | Start is the window start, as epoch nanoseconds. |
| `end`     | query | string  | yes      | End is the window end, as epoch nanoseconds.     |
| `step`    | query | integer | —        | Step is the bucket width in seconds.             |
| `service` | query | string  | —        | Service narrows usage to one service.            |

## Response

| Status    | Body                  | Meaning           |
| --------- | --------------------- | ----------------- |
| `200`     | o11y.O11yUsageItem\[] | ok                |
| `202`     | Approval              | held for approval |
| `default` | problem-details       | refused           |

`200` body — 3 fields.

| Field          | In   | Type               | Always | Description                                          |
| -------------- | ---- | ------------------ | ------ | ---------------------------------------------------- |
| `[].count`     | body | integer (uint64)   | —      | Count is how many spans were ingested in the bucket. |
| `[].time`      | body | string (date-time) | —      | Time is the bucket start.                            |
| `[].timestamp` | body | integer (uint64)   | —      | Timestamp is the bucket start, as epoch nanoseconds. |

Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors).

## Examples

**CLI**

```bash
hanzo o11y usage \
  --start <start> \
  --end <end>
```

**SDK**

**.ts**

```ts
import { Configuration, O11yApi } from 'hanzoai';

const api = new O11yApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.getO11yUsage({ start: 'start', end: 'end' });
```

**.py**

```python
from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import O11yApi

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = O11yApi(client).get_o11y_usage(start='start', end='end')
```

**.go**

```go
cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.O11yAPI.GetO11yUsage(context.Background()).Execute()
if err != nil {
	return err
}
```

**.rs**

```rust
use hanzo_client::apis::{configuration::Configuration, o11y_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = o11y_api::get_o11y_usage(&cfg, Default::default()).await?;
```

**.java**

```java
import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.O11yApi;

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new O11yApi(client).getO11yUsage();
```

**HTTP**

```bash
curl https://api.hanzo.ai/v1/o11y/usage?start=%3Cstart%3E&end=%3Cend%3E \
  -H "Authorization: Bearer $HANZO_API_KEY"
```

**MCP**

Tool `o11y`, op `get_o11y_usage` — POST the JSON-RPC envelope to `https://api.hanzo.ai/v1/mcp`.

```bash
curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "o11y",
         "arguments": {
           "op": "get_o11y_usage",
           "input": {
             "start": "<start>",
             "end": "<end>"
           }
         }
       }
     }'
```

---

[O11y API](https://docs.hanzo.ai/docs/openapi/o11y) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)