# Set default chains and tokens via URL

{% hint style="info" %}
Squid website only! This is possible for widget integrators by setting [default chains and tokens](https://docs.squidrouter.com/old-v2-documentation-deprecated/add-a-widget/widget/customization-guide/default-chains-and-tokens) via iframe URL or widget config
{% endhint %}

You can customize the chains and tokens that are selected by default when visiting [https://app.squidrouter.com](https://app.squidrouter.com/) via the `chains` and `tokens` query parameters.

The first value (`x`) represents the source, and separated by a comma, the second one (`y`) represents the destination:

```
chains=x,y // chain id
tokens=x,y // token address
```

For example, the following URL will open the Squid app using Arbitrum and MAGIC for source and Ethereum and DAI for destination:

```
https://apiplus.squidrouter.com/?
chains=42161,1
&tokens=0x539bde0d7dbd336b79148aa742883198bbf60342,
0x6b175474e89094c44da98b954eedeac495271d0f
```