# Replace preferences — PUT /v1/o11y/user/preferences/{name}

URL: https://docs.hanzo.ai/docs/openapi/o11y/updateuserpreference

> Sets one preference of the calling user, by name.

`PUT /v1/o11y/user/preferences/{name}`

> [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/user/preferences/{name}` |
| **Method**    | `PUT`                                                  |
| **Operation** | `UpdateUserPreference`                                 |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`                 |

Sets one preference of the calling user, by name.
Viewer gate.

## Request

2 fields, body `application/json` (required).

| Field   | In   | Type   | Required | Description                                                                               |
| ------- | ---- | ------ | -------- | ----------------------------------------------------------------------------------------- |
| `name`  | path | string | yes      |                                                                                           |
| `value` | body | any    | —        | Value is the value to set; its JSON type must match the preference's declared value type. |

## Response

| Status    | Body            | Meaning           |
| --------- | --------------- | ----------------- |
| `202`     | Approval        | held for approval |
| `204`     | —               | no content        |
| `default` | problem-details | refused           |

`202` body — 3 fields.

| Field    | In   | Type   | Always | Description |
| -------- | ---- | ------ | ------ | ----------- |
| `clause` | body | string | —      |             |
| `reason` | body | string | —      |             |
| `status` | body | string | —      |             |

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

## Examples

**CLI**

```bash
hanzo o11y user preferences set <name>
```

**SDK**

**.ts**

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

const api = new O11yApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.updateUserPreference({ name: 'name', value: "<value>" });
```

**.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).update_user_preference(name='name', value="<value>")
```

**.go**

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

resp, _, err := client.O11yAPI.UpdateUserPreference(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::update_user_preference(&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).updateUserPreference();
```

**HTTP**

```bash
curl -X PUT https://api.hanzo.ai/v1/o11y/user/preferences/<name> \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "value": "<value>"
     }'
```

**MCP**

MCP reaches **o11y** through the `o11y` tool, which names its 307 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": "list_o11y_autocomplete_aggregate_attributes"
         }
       }
     }'
```

---

[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)