> ## Documentation Index > Fetch the complete documentation index at: https://dev.moonpay.com/llms.txt > Use this file to discover all available pages before exploring further. # URL Integration > You can use the below pre-written code to quickly get started on adding a Sell Crypto button that opens the MoonPay widget in a new browser tab. export const ExampleButtonSell = () => { const handleClick = () => { window.open("https://sell-sandbox.moonpay.com/?apiKey=pk_test_oxQY1qdAGKlItZrVIRQ9qpNwpfAPHjQ&theme=dark&defaultBaseCurrencyCode=eth&baseCurrencyAmount=0.05&colorCode=%237d01ff", "_blank"); }; return

; }; **URL**: `https://sell-sandbox.moonpay.com/?apiKey=pk_test_123` ```html sandbox.html theme={null}

``` ```css sandbox.css theme={null} .container { background-color: #392a54; padding: 20px; text-align: center; } button { background-color: #7d00fe; border: none; color: white; padding: 15px 50px; font-size: 16px; cursor: pointer; border-radius: 4px; background-image: url("https://images.crunchbase.com/image/upload/c_lpad,h_170,w_170,f_auto,b_white,q_auto:eco,dpr_1/jglje7ar0xc6j5lvai6t"); background-repeat: no-repeat; background-position: right center; background-size: contain; } ``` **URL**: `https://sell.moonpay.com/?apiKey=pk_live_123` ```html sandbox.html theme={null}