<form action="https://api.chargeio.com/v1/tokens" method="POST">
    <input type="hidden" name="public_key" value="..."/>
    <input type="hidden" name="type" value="card"/>
    <input type="hidden" name="redirect_url" value="https://merchant.example.com/payment"/>
    ...
    <input type="text" id="card_name" name="name" placeholder="Name on Card">
    <input type="text" id="card_number" name="number" placeholder="Card Number">
    ...
    <button type="submit">Submit Charge</button>
</form>