UpdateAddressbasedOnZIPAPI.apxc

public class UpdateAddressbasedOnZIPAPI {

    public class ziptasticReturn {
    	string country;
	    string state;
	    string city;
     public timezone timezone;
     public Decimal lng ;
     public Decimal lat;
	}
    
    public class timezone{
        public String timezone_abbr;
        public String timezone_identifier;
        public Integer utc_offset_sec;
        public String is_dst;
    }
    
  @future (callout = true) 
	public static void makeZipCallout(Set<Id> AccIds)
	{
       string apiKey='s6w1QQDzvHeuLDfoUaXk0E8xjsHgisQLchSxc89NWtbn91T3AiyyHgti09hFssGq';
       List<Account> AccList = [SELECT Id, BillingPostalCode, BillingCity, BillingState, BillingCountry
									FROM Account 
									WHERE Id IN :AccIds];
        for(Account lrec : AccList){
            string endpoint = 'https://www.zipcodeapi.com/rest/{apiKey}/info.json/{zipCode}/degrees';
            endpoint=endpoint.replace('{apiKey}', apiKey).replace('{zipCode}',lrec.BillingPostalCode);
		 
        HttpRequest req = new HttpRequest();
		    HttpResponse res = new HttpResponse();
		    Http http = new Http();
		    req.setMethod('GET');
		    req.setEndpoint(endpoint);
	 
		    try {
		      res = http.send(req);
		      if (res.getStatusCode() != 200) {
		        //throw new accountException(res.getStatus());
		      }
		    } catch (Exception e) {
		      system.debug(LoggingLevel.Error, 'Error HTTP response code = '+res.getStatusCode()+'; calling '+endpoint );
		      return;
		    }
            
            String resp = res.getBody();
	    	JSONParser parser = JSON.createParser(resp);
	    	parser.nextToken();   
        	ziptasticReturn zipInfo = new ziptasticReturn();
		    zipInfo = (ziptasticReturn) parser.readValueAs(ziptasticReturn.class);
		    lrec.BillingState = zipInfo.state;
		    lrec.BillingCity = zipInfo.city;
		    lrec.BillingCountry = zipInfo.country;
        lrec.BillingLatitude = zipInfo.lat;
        lrec.BillingLongitude = zipInfo.lng;
        lrec.Customer_Timezone__c = zipInfo.timezone.timezone_abbr; //Customer Timezone is custom field with data type as TEXT on Account Object
        }
        update AccList;
    }
}