diff --git a/include/api/_Api.hpp b/include/api/_Api.hpp
index 360e0bf..3ce2b0e 100644
--- a/include/api/_Api.hpp
+++ b/include/api/_Api.hpp
@@ -61,27 +61,31 @@ namespace kdeck
 
         API_CALL_HEADERS(GetEvents)
         {
+            headers.put("Content-Type", "application/json");
             headers.put("Accept", "application/json");
         }
-        API_CALL("GET", "{basePath}/events", GetEvents, PATH(String, basePath), QUERY(Object<EventsRequest>, eventsRequest))
+        API_CALL("GET", "{basePath}/events", GetEvents, PATH(String, basePath), BODY_DTO(Object<EventsRequest>, eventsRequest))
 
         API_CALL_HEADERS(GetEvent)
         {
+            headers.put("Content-Type", "application/json");
             headers.put("Accept", "application/json");
         }
-        API_CALL("GET", "{basePath}/events/{event_ticker}", GetEvent, PATH(String, basePath), PATH(String, event_ticker), QUERY(Object<EventRequest>, eventRequest))
+        API_CALL("GET", "{basePath}/events/{event_ticker}", GetEvent, PATH(String, basePath), PATH(String, event_ticker), BODY_DTO(Object<EventRequest>, eventRequest))
 
         API_CALL_HEADERS(GetMarkets)
         {
+            headers.put("Content-Type", "application/json");
             headers.put("Accept", "application/json");
         }
-        API_CALL("GET", "{basePath}/markets", GetMarkets, PATH(String, basePath), AUTHORIZATION(String, authString, "Bearer"), QUERY(Object<MarketsRequest>, marketsRequest))
+        API_CALL("GET", "{basePath}/markets", GetMarkets, PATH(String, basePath), AUTHORIZATION(String, authString, "Bearer"), BODY_DTO(Object<MarketsRequest>, marketsRequest))
 
         API_CALL_HEADERS(GetTrades)
         {
+            headers.put("Content-Type", "application/json");
             headers.put("Accept", "application/json");
         }
-        API_CALL("GET", "{basePath}/markets/trades", GetTrades, PATH(String, basePath), QUERY(Object<TradesRequest>, tradesRequest))
+        API_CALL("GET", "{basePath}/markets/trades", GetTrades, PATH(String, basePath), BODY_DTO(Object<TradesRequest>, tradesRequest))
 
         API_CALL_HEADERS(GetMarket)
         {
@@ -91,9 +95,10 @@ namespace kdeck
 
         API_CALL_HEADERS(GetMarketOrderbook)
         {
+            headers.put("Content-Type", "application/json");
             headers.put("Accept", "application/json");
         }
-        API_CALL("GET", "{basePath}/markets/{ticker}/orderbook", GetMarketOrderbook, PATH(String, basePath), AUTHORIZATION(String, authString, "Bearer"), QUERY(String, ticker), QUERY(Object<MarketOrderbookRequest>, marketOrderbookRequest))
+        API_CALL("GET", "{basePath}/markets/{ticker}/orderbook", GetMarketOrderbook, PATH(String, basePath), AUTHORIZATION(String, authString, "Bearer"), QUERY(String, ticker), BODY_DTO(Object<MarketOrderbookRequest>, marketOrderbookRequest))
 
         API_CALL_HEADERS(GetSeries)
         {
@@ -103,9 +108,10 @@ namespace kdeck
 
         API_CALL_HEADERS(GetMarketCandlesticks)
         {
+            headers.put("Content-Type", "application/json");
             headers.put("Accept", "application/json");
         }
-        API_CALL("GET", "{basePath}/series/{series_ticker}/markets/{ticker}/candlesticks", GetMarketCandlesticks, PATH(String, basePath), AUTHORIZATION(String, authString, "Bearer"), PATH(String, series_ticker), PATH(String, ticker), QUERY(Object<MarketCandlesticksRequest>, marketCandlesticksRequest))
+        API_CALL("GET", "{basePath}/series/{series_ticker}/markets/{ticker}/candlesticks", GetMarketCandlesticks, PATH(String, basePath), AUTHORIZATION(String, authString, "Bearer"), PATH(String, series_ticker), PATH(String, ticker), BODY_DTO(Object<MarketCandlesticksRequest>, marketCandlesticksRequest))
 
         // portfolio ////////////////////////////////////////////////////////////////////
         /////////////////////////////////////////////////////////////////////////////////