> For the complete documentation index, see [llms.txt](https://docs.trust.enterprises/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trust.enterprises/rest-api/topics/updating-a-topic.md).

# Updating a topic

## Update a topic

<mark style="color:orange;">`PUT`</mark> `https://hedera-serverless-consensus.vercel.app/api/consensus/topic/:id`

This endpoint allows you to update the memo of the topic, only from the original creator of the topic.

#### Path Parameters

| Name | Type   | Description          |
| ---- | ------ | -------------------- |
| id   | string | The id of the topic. |

#### Query Parameters

| Name | Type   | Description                                       |
| ---- | ------ | ------------------------------------------------- |
| memo | string | The memo that you want to update the topic id to. |

#### Headers

| Name           | Type   | Description                                                      |
| -------------- | ------ | ---------------------------------------------------------------- |
| Authentication | string | The **API\_SECRET\_KEY** from the  client environment variables. |

{% tabs %}
{% tab title="200 Cake successfully retrieved." %}

```
{
    "data": {
        "memo": "Updated memo",
        "topic_id": "16091",
        "accountId": {
            "shard": 0,
            "realm": 0,
            "account": 1156
        },
        "validStart": {
            "seconds": 1598827049,
            "nanos": 719000000
        }
    }
}
```

{% endtab %}
{% endtabs %}