## Add Watchlist Item

`WatchlistAddWatchlistItemResponse v1().watchlist().addWatchlistItem(WatchlistAddWatchlistItemParamsparams, RequestOptionsrequestOptions = RequestOptions.none())`

**post** `/v1/watchlists/{watchlist_id}/items`

Add an instrument to a watchlist

### Parameters

- `WatchlistAddWatchlistItemParams params`

  - `Optional<String> watchlistId`

  - `String instrumentId`

    OEMS instrument UUID

### Returns

- `class WatchlistAddWatchlistItemResponse:`

  - `AddWatchlistItemData data`

    Response data for adding a watchlist item

    - `String itemId`

      ID of the created item

### Example

```java
package com.clear_street.api.example;

import com.clear_street.api.client.ClearStreetClient;
import com.clear_street.api.client.okhttp.ClearStreetOkHttpClient;
import com.clear_street.api.models.v1.watchlist.WatchlistAddWatchlistItemParams;
import com.clear_street.api.models.v1.watchlist.WatchlistAddWatchlistItemResponse;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        ClearStreetClient client = ClearStreetOkHttpClient.builder()
            .fromEnv()
            .apiKey("My API Key")
            .build();

        WatchlistAddWatchlistItemParams params = WatchlistAddWatchlistItemParams.builder()
            .watchlistId("550e8400-e29b-41d4-a716-446655440000")
            .instrumentId("182bd5e5-6e1a-4fe4-a799-aa6d9a6ab26e")
            .build();
        WatchlistAddWatchlistItemResponse response = client.v1().watchlist().addWatchlistItem(params);
    }
}
```

#### Response

```json
{
  "data": {
    "item_id": "770e8400-e29b-41d4-a716-446655440002"
  },
  "error": null,
  "metadata": {
    "request_id": "b2c3d4e5-f6a7-8901-2345-678901bcdefg"
  }
}
```