> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-eb-mini-app-ia-overhaul.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# getOnrampBuyUrl

The `getOnrampBuyUrl` utility is a helper method to generate a Coinbase Onramp URL. It helps you customize the funding
experience for your users. For example:

* Selecting which assets should be available to buy/send
* Selecting which networks crypto should be received on
* Setting a default buy/send amount
* Setting a redirect URL to return your users to your app after they complete the fund flow

## Usage

<CodeGroup>
  ```tsx code
  import { getOnrampBuyUrl } from '@coinbase/onchainkit/fund';

  const projectId = 'YOUR_CDP_PROJECT_ID';
  const onrampBuyUrl = getOnrampBuyUrl({
    projectId,
    addresses: { '0x1': ['base'] },
    assets: ['USDC'],
    presetFiatAmount: 20,
    fiatCurrency: 'USD',
    redirectUrl: 'https://yourapp.com/onramp-return?param=foo',
  });
  ```

  ```json return value
  'https://pay.coinbase.com/buy?addresses=%7B%220x1%22%3A%5B%22base%22%5D%7D&appId=project-id&assets=%5B%22USDC%22%5D&fiatCurrency=USD&presetFiatAmount=20&redirectUrl=https%3A%2F%2Fyourapp.com%2Fonramp-return%3Fparam%3Dfoo'
  ```
</CodeGroup>

## Returns

`string` - Returns a full Coinbase Onramp URL that you can redirect your users to, or open in a popup.

## Parameters

[`GetOnrampUrlWithProjectIdParams`](/onchainkit/fund/types#getonrampurlwithprojectidparams) | [`GetOnrampUrlWithSessionTokenParams`](/onchainkit/fund/types#getonrampurlwithsessiontokenparams)