> For the complete documentation index, see [llms.txt](https://docs.tread.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tread.fi/tread.fi-institutional-api-docs/account-creation-and-api-key-connection/connecting-to-exchanges/extended.md).

# Extended

**If you do not have an Extended account, sign up** [**here**](https://app.extended.exchange/join/TREADFI) **or with our referral code TREADFI**

#### **Link your Extended Account to tread.fi**

* Navigate to **Key Management** menu on tread.fi. This can be accessed by clicking on the wallet icon on the top right corner on app.tread.fi after you have logged in.

<figure><img src="https://content.gitbook.com/content/QGcP9MNIBq6caHeVJrjq/blobs/4HsVr5fmY7In3K4OpRcW/Screenshot%202568-12-09%20at%2014.00.13.png" alt=""><figcaption></figcaption></figure>

* Click **Connect Extended on tread.fi**
* Connect the same wallet you used to connect to Extended
* (Optional) Set a reference name for this exchange account.

<figure><img src="https://content.gitbook.com/content/QGcP9MNIBq6caHeVJrjq/blobs/uaN6XWl3fN5FwNHqlxts/Screenshot%202568-12-12%20at%2015.28.57.png" alt=""><figcaption></figcaption></figure>

* **(Optional) Sub-accounts or vaults:** If you have sub-accounts you can select specific sub account you want to connect.

### Builder Fee Notice

A 2 basis (0.02%) points builder fee applies to Extended trades executed via our tread.fi