diff --git a/api.go b/api.go
index e43c6f1..5650fbf 100644
--- a/api.go
+++ b/api.go
@@ -1,25 +1,20 @@
 package bond
 
 import (
-	//"io"
+	"io"
 	"encoding/json"
 	"net/http"
 	"net/url"
 	"fmt"
-)
-
-type ContentType string
-
-const (
-	PlainText ContentType = "text/plain; charset=utf-8"
+	"github.com/di4f/bond/contents"
 )
 
 type Decoder interface {
 	Decode(any) error
 }
 
-type ApiFunc func(*Context)
-func (fn ApiFunc) ServeHTTP(w ResponseWriter, r *Request) {
+type Func func(*Context)
+func (fn Func) ServeHTTP(w ResponseWriter, r *Request) {
 	fn(&Context{
 		R: r,
 		W: w,
@@ -31,14 +26,16 @@ type Context struct {
 	W ResponseWriter
 	// Custom data to store stuff.
 	Data any
+
+	scanErr error
 	dec Decoder
 }
 
-func (c *Context) SetContentType(typ ContentType) {
+func (c *Context) SetContentType(typ contents.Type) {
 	c.SetHeader("Content-Type", string(typ))
 }
 
-func (c *Context) ContentType() string {
+func (c *Context) ContentType() contents.Type {
 	ret, ok := c.Header("Content-Type")
 	if !ok {
 		return ""
@@ -46,7 +43,7 @@ func (c *Context) ContentType() string {
 	if len(ret) < 1 {
 		return ""
 	}
-	return ret[0]
+	return contents.Type(ret[0])
 }
 
 func (c *Context) SetHeader(k, v string) {
@@ -65,21 +62,29 @@ func (c *Context) Close() {
 
 // Scan the incoming value from body depending
 // on the content type of the request.
-func (c *Context) Scan(v any) error {
+func (c *Context) Scan(v any) bool {
 	if c.dec == nil {
 		typ := c.ContentType()
 		switch typ {
-		case "application/json" :
+		case contents.Json :
 			c.dec = json.NewDecoder(c.R.Body)
 		default:
-			return UnknownContentTypeErr
+			c.scanErr = UnknownContentTypeErr
+			return false
 		}
 	}
 	err := c.dec.Decode(v)
 	if err != nil {
-		return err
+		if err != io.EOF {
+			c.scanErr = err
+		}
+		return false
 	}
-	return nil
+	return true
+}
+
+func (c *Context) ScanErr() error {
+	return c.scanErr
 }
 
 func (c *Context) Path() string {
diff --git a/cmd/test/main.go b/cmd/test/main.go
index fcab9f6..844da8c 100644
--- a/cmd/test/main.go
+++ b/cmd/test/main.go
@@ -2,25 +2,32 @@ package main
 
 import (
 	"github.com/di4f/bond"
+	"github.com/di4f/bond/methods"
+	"github.com/di4f/bond/contents"
 )
 
+type GetNotesOptions struct {
+	Id int `json:"id"`
+	Name string `json:"name"`
+}
+
 var root = bond.Mux().
 	Def(
 		"",
-		bond.ApiFunc(func(c *bond.Context) {
+		bond.Func(func(c *bond.Context) {
 			c.W.Write([]byte("This is the index page"))
 		}),
 	).Def(
 	"hello",
 	bond.Mux().Def(
 		"en",
-		bond.ApiFunc(func(c *bond.Context) {
-			c.W.Write([]byte("Hello, World!"))
+		bond.Func(func(c *bond.Context) {
+			c.Printf("Hello, World!")
 		}),
 	).Def(
 		"ru",
-		bond.ApiFunc(func(c *bond.Context) {
-			c.W.Write([]byte("Привет, Мир!"))
+		bond.Func(func(c *bond.Context) {
+			c.Printf("Привет, Мир!")
 		}),
 	),
 ).Def(
@@ -28,8 +35,8 @@ var root = bond.Mux().
 	bond.Static("./static"),
 ).Def(
 	"test",
-	bond.ApiFunc(func(c *bond.Context) {
-		c.SetContentType(bond.PlainText)
+	bond.Func(func(c *bond.Context) {
+		c.SetContentType(contents.Plain)
 		c.Printf(
 			"Path: %q\n"+
 				"Content-Type: %q\n",
@@ -43,6 +50,16 @@ var root = bond.Mux().
 			}
 		}
 	}),
+).Def(
+	"get-notes",
+	bond.Method().Def(
+		methods.Get,
+		bond.Func(func(c *bond.Context){
+			opts := GetNotesOptions{}
+			c.Scan(&opts)
+			c.Printf("%v", opts)
+		}),
+	),
 )
 
 func main() {