# Operations

Aevo Websocket API Operations can be categorized into 2, `PUBLISH` and `SUBSCRIBE`.

```
  <th style={{ textAlign: "left" }}>
    Name
  </th>

  <th style={{ textAlign: "left" }}>
    Description
  </th>
</tr>
```

```
  <td style={{ textAlign: "left" }}>
    **PUBLISH**
  </td>

  <td style={{ textAlign: "left" }}>
    One time call to a specific `op` code. This similar to calling a HTTP request such as a `GET` or a `POST` request.
  </td>
</tr>

<tr>
  <td style={{ textAlign: "left" }}>
    <div class="ws-method-div"><span class="APIMethod APIMethod_fixedWidth ws-sub-tag">SUB</span></div>
  </td>

  <td style={{ textAlign: "left" }}>
    **SUBSCRIBE**
  </td>

  <td style={{ textAlign: "left" }}>
    Subscription to a channel. After subscribing successfully, the client will receive updates periodically from the server.
  </td>
</tr>
```

| Symbol |
| ------ |
| PUB    |


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```
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```

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