# Replace optin

URL: https://docs.hanzo.ai/docs/openapi/flag/put-flag-optin

> Sets the signed-in caller's OWN opt-in to public betas: on, every public beta and each one promoted later is on for them; off, none is.

`PUT /v1/flag/optin`

> [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/optin`   |
| **Method**    | `PUT`                                  |
| **Operation** | `put_flag_optin`                       |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY` |

Sets the signed-in caller's OWN opt-in to public betas: on, every
public beta and each one promoted later is on for them; off, none is. Self only:
the row written is the caller's validated subject, whatever the request says.
Opting in while the org they act in blocked it is refused; opting out never is.

## Request

1 field, body `application/json` (required).

| Field | In   | Type    | Required | Description                                                                                    |
| ----- | ---- | ------- | -------- | ---------------------------------------------------------------------------------------------- |
| `on`  | body | boolean | —        | On opts the caller in to every public beta, current and future, when true, and out when false. |

## Response

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

`200` body — 3 fields.

| Field     | In   | Type      | Always | Description                                                                                                         |
| --------- | ---- | --------- | ------ | ------------------------------------------------------------------------------------------------------------------- |
| `blocked` | body | boolean   | —      | Blocked is true when the org the caller acts in turned the opt-in off for its members.                              |
| `on`      | body | boolean   | —      | On is true when the caller opted in: every public beta, and each one promoted later, is on for them unless Blocked. |
| `public`  | body | string\[] | —      | Public is the id of every beta anyone may opt in to (beta.\<id>).                                                   |

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

## Examples

**CLI**

```bash
hanzo flag optin replace
```

**SDK**

**.ts**

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

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

**.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).put_flag_optin(on=False)
```

**.go**

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

resp, _, err := client.FlagAPI.PutFlagOptin(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::put_flag_optin(&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).putFlagOptin();
```

**HTTP**

```bash
curl -X PUT https://api.hanzo.ai/v1/flag/optin \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "on": false
     }'
```

**MCP**

MCP reaches **flag** through the `flag` tool, which names its 12 operations with its own verbs — this one among them, under a name only MCP declares. `describe` explains any of them:

```bash
curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "describe",
         "arguments": {
           "op": "get_flag_activity"
         }
       }
     }'
```

---

[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)