If you're using WordPress, you can easily cache your donations using these two functions. Make sure to enter your API key and SUBDOMAIN

cached-donations-solution.php

<?php
/**
 * Get and store API call in a transient for better
 * performance. 
 * @return object from either a transient or the API directly
 */
function notforsale_get_donations()
{
    $donations = get_transient( 'dntly_donations' ); //Get's the value stored in the transient

    //Check to see if anything exists
    if( false === $donations ) {

        $donations = notforsale_get_donations_api_call(); //Make the API call

        if( $donations->success === true ){

            set_transient( 'dntly_donations', $donations, HOUR_IN_SECONDS ); //If successfull, set the transient for use for the next hour   
        }
        
    }

    return $donations;
}


/**
 * Makes the call to get donations. 
 * @return object returns the API object from Donately
 */
function notforsale_get_donations_api_call()
{
  
    $url           = 'https://YOUR_SUB_DOMAIN.dntly.com/api/v1/admin/donations.json';
    $count         = 10;
    
    $minutes       = HOUR_IN_SECONDS;
    $time          = time();
    $hour_ago      = $minutes - $time;
    
    $token         = 'ENTER API KEY HERE';
    $authorization = 'Basic ' . base64_encode("{$token}:");
    $headers       = array( 'Authorization' => $authorization, 'sslverify' => false );

    $payload = array(
        'count'       => $count,
        'order'       => 'desc',
        'created[gt]' => $hour_ago,
        // 'order_by'    => 'amount_in_cents',
        );

    $response = wp_safe_remote_get( $url, array(
        'method'      => 'GET',
        'timeout'     => 45,
        'redirection' => 5,
        'httpversion' => '1.0',
        'blocking'    => true,
        'headers'     => $headers,
        'body'        => http_build_query( $payload ),
        'cookies'     => array()
        ));

    $body   = wp_remote_retrieve_body( $response );
    $donors = json_decode( $body );

    return $donors; 
    
}