# Exchange Rate

To determine the rate,  make a **GET** request to the following endpoint.

{% code overflow="wrap" %}

```url
https://api.localramp.co/v1/institution/buy/rate?sender_currency=NGN
```

{% endcode %}

The request takes `sender_currency`  as a query parameter. 

With the following header

```
x-auth-token: <SECRET_KEY>
```

{% hint style="success" %}
Rates for institutional on-ramp can only be **locked** for 20 mins after initiating the transaction
{% endhint %}