> For the complete documentation index, see [llms.txt](https://docs.aevo.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aevo.xyz/api-reference/websocket-api/public-operations/subcribe-index.md).

# SUBSCRIBE Index

**REQUEST**

```
<tr>
  <td>
    * \*data\*\* <span class="ws-data-type ws-small-font">array of strings</span>  <span class="ws-required-tag ws-small-font">required</span>
      Channel name in the format `index:ASSET`. Eg. `index:ETH`
  </td>
</tr>
```

<table data-header-hidden><thead><tr><th></th></tr></thead><tbody><tr><td><pre><code>  &#x3C;/th>
&#x3C;/tr>
</code></pre></td></tr><tr><td>* \*op\*\* string required Operation code allowed values: `subscribe` `unsubscribe`</td></tr></tbody></table>

* `ASSET` allowed values: `ETH`

<details>

<summary>Example</summary>

```json
{
  "op":"subscribe", 
  "data": ["index:ETH"]
}
```

</details>

<br>

**RESPONSE**

```
<tr>
  <td>
    <span class="ws-small-font">data.</span>**price** <span class="ws-data-type ws-small-font">string</span> <span class="ws-required-tag ws-small-font">required</span>
    Price in USD. Eg. `12.23`
  </td>
</tr>

<tr>
  <td>
    <span class="ws-small-font">data.</span>**timestamp** <span class="ws-data-type ws-small-font">string</span> <span class="ws-required-tag ws-small-font">required</span>
    Index update timestamp in UNIX timestamp in nanoseconds. Eg. `1680249600000000000`
  </td>
</tr>
```

<table data-header-hidden><thead><tr><th></th></tr></thead><tbody><tr><td><pre><code>  &#x3C;/th>
&#x3C;/tr>
</code></pre></td></tr><tr><td>* \*channel\*\* string required Channel name in the format `index:ASSET`. Eg. `index:ETH`</td></tr></tbody></table>

<details>

<summary>Example</summary>

```json
{
    "channel": "index:ETH",
    "data": {
        "price": "1337.16",
        "timestamp": "1673438070391698947"
    }
}
```

</details>

<br>


---

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