diff --git a/encoder.go b/encoder.go
index d6bed5f..f0e8495 100644
--- a/encoder.go
+++ b/encoder.go
@@ -9,6 +9,8 @@ import (
 	"bytes"
 	"encoding/json"
 	"encoding/xml"
+	"github.com/go-martini/martini"
+	"net/http"
 	"reflect"
 	"time"
 )
@@ -17,6 +19,7 @@ import (
 // requests on the API endpoints.
 type Encoder interface {
 	Encode(v ...interface{}) ([]byte, error)
+	Render(v ...interface{}) []byte
 }
 
 // Because `panic`s are caught by martini's Recovery handler, it can be used
@@ -63,6 +66,10 @@ func (_ JsonEncoder) Encode(v ...interface{}) ([]byte, error) {
 	return json.Marshal(result)
 }
 
+func (enc JsonEncoder) Render(v ...interface{}) []byte {
+	return Must(enc.Encode(v...))
+}
+
 type XmlEncoder struct{}
 
 // Since we don't use xml as a binding source, we don't need to use
@@ -91,6 +98,10 @@ func (_ XmlEncoder) Encode(v ...interface{}) ([]byte, error) {
 	return buffer.Bytes(), nil
 }
 
+func (enc XmlEncoder) Render(v ...interface{}) []byte {
+	return Must(enc.Encode(v...))
+}
+
 func copyStruct(v reflect.Value) reflect.Value {
 	if v.Kind() == reflect.Ptr {
 		v = v.Elem()
@@ -158,3 +169,17 @@ func iterateSlice(v reflect.Value) reflect.Value {
 
 	return result
 }
+
+func JSON() func(martini.Context, http.ResponseWriter) {
+	return func(c martini.Context, w http.ResponseWriter) {
+		c.MapTo(JsonEncoder{}, (*Encoder)(nil))
+		w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	}
+}
+
+func XML() func(martini.Context, http.ResponseWriter) {
+	return func(c martini.Context, w http.ResponseWriter) {
+		c.MapTo(XmlEncoder{}, (*Encoder)(nil))
+		w.Header().Set("Content-Type", "application/xml; charset=utf-8")
+	}
+}