# Parameters

## List of api variables 

<table><thead><tr><th width="117.39453125">Name</th><th width="84.421875">Type</th><th>Descriptiom</th><th width="228.56640625">Value</th></tr></thead><tbody><tr><td><em><mark style="color:red;">env_url</mark></em></td><td>String</td><td>Base url for the current environment</td><td>sandbox: <a href="https://dev.kcookery.com">https://dev.kcookery.com</a><br>live: <a href="https://gate.klasapps.com/pay">https://gate.klasapps.com</a></td></tr><tr><td><em><mark style="color:red;">gateway</mark></em></td><td>String</td><td>Supported currencies for card payment as listed <a href="https://developers.klasha.com/integrating-klasha/prerequisites#payment-methods-we-support-in-each-country">here</a> (e.g. NGN, ZAR)</td><td>e.g. NGN, ZAR, USD e.t.c</td></tr><tr><td><em><mark style="color:red;">tx_ref</mark></em></td><td>String</td><td>The unique reference sent during initial payment call, also contained in the successful responses. (should be UUID format or a guaranteed unique value)</td><td>e.g b0c3f173-0954-4124-8480-89352e034974</td></tr></tbody></table>