# List health

URL: https://docs.hanzo.ai/docs/openapi/flag/get-flag-health

> Reports that the flag engine is serving.

`GET /v1/flag/health`

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

|               |                                        |
| ------------- | -------------------------------------- |
| **Address**   | `https://api.hanzo.ai/v1/flag/health`  |
| **Method**    | `GET`                                  |
| **Operation** | `get_flag_health`                      |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY` |

Reports that the flag engine is serving. It is not gated: liveness must
be probe-able without a token.

## Request

`GET /v1/flag/health` takes no parameters and no body — the credential is the whole request.

## Response

| Status    | Body            | Meaning |
| --------- | --------------- | ------- |
| `200`     | flag.healthOut  | ok      |
| `default` | problem-details | refused |

`200` body — 2 fields.

| Field    | In   | Type    | Always | Description                                      |
| -------- | ---- | ------- | ------ | ------------------------------------------------ |
| `engine` | body | string  | —      | Engine names the evaluator this deployment runs. |
| `ok`     | body | boolean | —      | OK is true whenever the flag engine is serving.  |

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

## Examples

**CLI**

```bash
hanzo flag health
```

**SDK**

**.ts**

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

const api = new FlagApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.getFlagHealth();
```

**.py**

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

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = FlagApi(client).get_flag_health()
```

**.go**

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

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

**.rs**

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

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

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

**.java**

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

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

var result = new FlagApi(client).getFlagHealth();
```

**HTTP**

```bash
curl https://api.hanzo.ai/v1/flag/health \
  -H "Authorization: Bearer $HANZO_API_KEY"
```

**MCP**

Tool `flag`, op `get_flag_health` — 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": "flag",
         "arguments": {
           "op": "get_flag_health",
           "input": {}
         }
       }
     }'
```

---

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