# MEVNextProposerInfo

`MEVNextProposerInfo` feed provides details of next Ethereum block proposer, allowing searchers to know if the proposer is registered with a MEV relay service. 

**Service available via Cloud API only.**

## Stream Endpoint

* Method: `MEVNextProposerInfo`     
* Endpoint: `wss://mev-eth.blxrbdn.com/ws`

### Parameters <a href="#options" id="options"></a>

| Key           | Description                                        | Values                                                                                                           |
| ------------- | -------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------- |
| **`include`** | Fields to include in the MEV proposer info stream. | <p><strong><code>slot\_number, index, public\_key, mev\_boost</code></strong></p><p><em>\[Default: all]</em></p> |

### Examples

#### Request

{% tabs %}
{% tab title="wscat" %}

```bash
wscat -c wss://mev-eth.blxrbdn.com/ws --header "Authorization: <YOUR-AUTHORIZATION-HEADER>" --no-check
> {"id": 1, "method": "subscribe", "params": ["MEVNextProposerInfo", {"include": []}]}
```

{% endtab %}
{% endtabs %}

#### Response

{% tabs %}
{% tab title="Transaction Event" %}

```bash
{
  "id": 1,
  "method": "subscribe",
  "params": {
    "subscription": "cb78a4f1-fb9c-4f12-8e21-32f34c28a338",
    "result": {
      "slotNumber": 4047824, 
      "index": 370301,
      "publicKey": "0x8c8b7685b109b16c2d7d52315298cbc099921d983fec780c242317a92699f54f62b2457b4a7db0d392c8e6d20da9be6e",
      "MEVBoost": true
    }
  }
}
```

{% endtab %}
{% endtabs %}

<table><thead><tr><th>Result Field</th><th>Description</th><th data-hidden></th><th data-hidden></th></tr></thead><tbody><tr><td><strong><code>slotNumber</code></strong></td><td>Next slot number</td><td></td><td></td></tr><tr><td><strong><code>index</code></strong></td><td>Index of the next proposer</td><td></td><td></td></tr><tr><td><strong><code>publicKey</code></strong></td><td>Public key of the next proposer</td><td></td><td></td></tr><tr><td><strong><code>MEVBoost</code></strong></td><td>Boolean flag indicating if the proposer is registered with at least one MEV relay service.</td><td></td><td></td></tr></tbody></table>