diff --git a/internal/proxy/middleware/attribute.go b/internal/proxy/attribute/attribute.go
similarity index 57%
rename from internal/proxy/middleware/attribute.go
rename to internal/proxy/attribute/attribute.go
index 080efedfe..b540f385d 100644
--- a/internal/proxy/middleware/attribute.go
+++ b/internal/proxy/attribute/attribute.go
@@ -1,12 +1,21 @@
-package middleware
+package attribute
+
+import (
+	"strings"
+
+	"github.com/valyala/fasttemplate"
+)
 
 const (
-	AttributeTypeQuery       AttributeType = "query"
-	AttributeTypeHeader      AttributeType = "header"
 	AttributeTypeJSONPayload AttributeType = "json_payload"
 	AttributeTypeGRPCPayload AttributeType = "grpc_payload"
-	AttributeTypePathParam   AttributeType = "path_param"
+	AttributeTypeQuery       AttributeType = "query"
+	AttributeTypeHeader      AttributeType = "header"
 	AttributeTypeConstant    AttributeType = "constant"
+	AttributeTypeComposite   AttributeType = "composite"
+
+	SourceRequest  AttributeType = "request"
+	SourceResponse AttributeType = "response"
 )
 
 type AttributeType string
@@ -18,4 +27,13 @@ type Attribute struct {
 	Path   string        `yaml:"path" mapstructure:"path"`
 	Params []string      `yaml:"params" mapstructure:"params"`
 	Value  string        `yaml:"value" mapstructure:"value"`
+	Source string        `yaml:"source" mapstructure:"source"`
+}
+
+func ComposeAttribute(attribute string, attrs map[string]interface{}) string {
+	if strings.Contains(attribute, "{") {
+		template := fasttemplate.New(attribute, "{", "}")
+		return template.ExecuteString(attrs)
+	}
+	return attribute
 }
diff --git a/internal/proxy/helper.go b/internal/proxy/helper.go
deleted file mode 100644
index 507a00189..000000000
--- a/internal/proxy/helper.go
+++ /dev/null
@@ -1,15 +0,0 @@
-package proxy
-
-import (
-	"strings"
-
-	"github.com/valyala/fasttemplate"
-)
-
-func ComposeAttribute(attribute string, attrs map[string]interface{}) string {
-	if strings.Contains(attribute, "{") {
-		template := fasttemplate.New(attribute, "{", "}")
-		return template.ExecuteString(attrs)
-	}
-	return attribute
-}
diff --git a/internal/proxy/hook/authz/authz.go b/internal/proxy/hook/authz/authz.go
index d1433c9c6..5408b98d8 100644
--- a/internal/proxy/hook/authz/authz.go
+++ b/internal/proxy/hook/authz/authz.go
@@ -18,7 +18,7 @@ import (
 	"github.com/goto/shield/core/relation"
 	"github.com/goto/shield/core/resource"
 	"github.com/goto/shield/core/user"
-	"github.com/goto/shield/internal/proxy"
+	proxyattr "github.com/goto/shield/internal/proxy/attribute"
 	"github.com/goto/shield/internal/proxy/hook"
 	"github.com/goto/shield/internal/proxy/middleware"
 	"github.com/goto/shield/pkg/body_extractor"
@@ -93,9 +93,9 @@ type Relation struct {
 }
 
 type Config struct {
-	Action     string                    `yaml:"action" mapstructure:"action"`
-	Attributes map[string]hook.Attribute `yaml:"attributes" mapstructure:"attributes"`
-	Relations  []Relation                `yaml:"relations" mapstructure:"relations"`
+	Action     string                         `yaml:"action" mapstructure:"action"`
+	Attributes map[string]proxyattr.Attribute `yaml:"attributes" mapstructure:"attributes"`
+	Relations  []Relation                     `yaml:"relations" mapstructure:"relations"`
 }
 
 func (a Authz) Info() hook.Info {
@@ -152,17 +152,17 @@ func (a Authz) ServeHook(res *http.Response, err error) (*http.Response, error)
 	for id, attr := range config.Attributes {
 		bdy, _ := middleware.ExtractRequestBody(res.Request)
 		bodySource := &res.Body
-		if attr.Source == string(hook.SourceRequest) {
+		if attr.Source == string(proxyattr.SourceRequest) {
 			bodySource = &bdy
 		}
 
 		headerSource := &res.Header
-		if attr.Source == string(hook.SourceRequest) {
+		if attr.Source == string(proxyattr.SourceRequest) {
 			headerSource = &res.Request.Header
 		}
 
 		switch attr.Type {
-		case hook.AttributeTypeGRPCPayload:
+		case proxyattr.AttributeTypeGRPCPayload:
 			if !strings.HasPrefix(res.Header.Get("Content-Type"), "application/grpc") {
 				a.log.Error("middleware: not a grpc request", "attr", attr)
 				return a.escape.ServeHook(res, fmt.Errorf("invalid header for http request: %s", res.Header.Get("Content-Type")))
@@ -176,7 +176,7 @@ func (a Authz) ServeHook(res *http.Response, err error) (*http.Response, error)
 			attributes[id] = payloadField
 
 			a.log.Info("middleware: extracted", "field", payloadField, "attr", attr)
-		case hook.AttributeTypeJSONPayload:
+		case proxyattr.AttributeTypeJSONPayload:
 			if attr.Key == "" {
 				a.log.Error("middleware: payload key field empty")
 				return a.escape.ServeHook(res, fmt.Errorf("payload key field empty"))
@@ -190,7 +190,7 @@ func (a Authz) ServeHook(res *http.Response, err error) (*http.Response, error)
 			attributes[id] = payloadField
 
 			a.log.Info("middleware: extracted", "field", payloadField, "attr", attr)
-		case hook.AttributeTypeHeader:
+		case proxyattr.AttributeTypeHeader:
 			if attr.Key == "" {
 				a.log.Error("middleware: header key field empty")
 				return a.escape.ServeHook(res, fmt.Errorf("failed to parse json payload"))
@@ -204,7 +204,7 @@ func (a Authz) ServeHook(res *http.Response, err error) (*http.Response, error)
 			attributes[id] = headerAttr
 			a.log.Info("middleware: extracted", "field", headerAttr, "attr", attr)
 
-		case hook.AttributeTypeQuery:
+		case proxyattr.AttributeTypeQuery:
 			if attr.Key == "" {
 				a.log.Error("middleware: query key field empty")
 				return a.escape.ServeHook(res, fmt.Errorf("failed to parse json payload"))
@@ -218,7 +218,7 @@ func (a Authz) ServeHook(res *http.Response, err error) (*http.Response, error)
 			attributes[id] = queryAttr
 			a.log.Info("middleware: extracted", "field", queryAttr, "attr", attr)
 
-		case hook.AttributeTypeConstant, hook.AttributeTypeComposite:
+		case proxyattr.AttributeTypeConstant, proxyattr.AttributeTypeComposite:
 			if attr.Value == "" {
 				a.log.Error("middleware:", string(attr.Type), "value empty")
 				return a.escape.ServeHook(res, fmt.Errorf("failed to parse json payload"))
@@ -396,7 +396,7 @@ func getAttributesValues(attributes interface{}) ([]string, error) {
 func composeResourcesName(resourceList []string, permissionAttributes map[string]interface{}) []string {
 	var resourcesName []string
 	for _, res := range resourceList {
-		resourcesName = append(resourcesName, proxy.ComposeAttribute(res, permissionAttributes))
+		resourcesName = append(resourcesName, proxyattr.ComposeAttribute(res, permissionAttributes))
 	}
 	return resourcesName
 }
diff --git a/internal/proxy/hook/authz/authz_test.go b/internal/proxy/hook/authz/authz_test.go
index 1691b66e7..de3b12f6d 100644
--- a/internal/proxy/hook/authz/authz_test.go
+++ b/internal/proxy/hook/authz/authz_test.go
@@ -16,6 +16,7 @@ import (
 	"github.com/goto/shield/core/relation"
 	"github.com/goto/shield/core/resource"
 	"github.com/goto/shield/core/rule"
+	"github.com/goto/shield/internal/proxy/attribute"
 	"github.com/goto/shield/internal/proxy/hook"
 	"github.com/goto/shield/internal/proxy/hook/authz/mocks"
 	shieldlogger "github.com/goto/shield/pkg/logger"
@@ -275,7 +276,7 @@ func TestServeHook(t *testing.T) {
 				rule.HookSpec{
 					Name: "authz",
 					Config: map[string]interface{}{
-						"attributes": map[string]hook.Attribute{
+						"attributes": map[string]attribute.Attribute{
 							"project": {
 								Type:  "constant",
 								Value: testPermissionAttributesMap["project"].(string),
@@ -346,7 +347,7 @@ func TestServeHook(t *testing.T) {
 				rule.HookSpec{
 					Name: "authz",
 					Config: map[string]interface{}{
-						"attributes": map[string]hook.Attribute{
+						"attributes": map[string]attribute.Attribute{
 							"project": {
 								Type:  "constant",
 								Value: testPermissionAttributesMap["project"].(string),
@@ -442,7 +443,7 @@ func TestServeHook(t *testing.T) {
 				rule.HookSpec{
 					Name: "authz",
 					Config: map[string]interface{}{
-						"attributes": map[string]hook.Attribute{
+						"attributes": map[string]attribute.Attribute{
 							"project": {
 								Type:  "constant",
 								Value: testPermissionAttributesMap["project"].(string),
@@ -541,7 +542,7 @@ func TestServeHook(t *testing.T) {
 				rule.HookSpec{
 					Name: "authz",
 					Config: map[string]interface{}{
-						"attributes": map[string]hook.Attribute{
+						"attributes": map[string]attribute.Attribute{
 							"project": {
 								Type:  "constant",
 								Value: testPermissionAttributesMap["project"].(string),
@@ -641,7 +642,7 @@ func TestServeHook(t *testing.T) {
 				rule.HookSpec{
 					Name: "authz",
 					Config: map[string]interface{}{
-						"attributes": map[string]hook.Attribute{
+						"attributes": map[string]attribute.Attribute{
 							"project": {
 								Type:  "constant",
 								Value: testPermissionAttributesMap["project"].(string),
diff --git a/internal/proxy/hook/hook.go b/internal/proxy/hook/hook.go
index fa405c95f..bc30cfdda 100644
--- a/internal/proxy/hook/hook.go
+++ b/internal/proxy/hook/hook.go
@@ -17,28 +17,6 @@ type Info struct {
 	Description string
 }
 
-const (
-	AttributeTypeJSONPayload AttributeType = "json_payload"
-	AttributeTypeGRPCPayload AttributeType = "grpc_payload"
-	AttributeTypeQuery       AttributeType = "query"
-	AttributeTypeHeader      AttributeType = "header"
-	AttributeTypeConstant    AttributeType = "constant"
-	AttributeTypeComposite   AttributeType = "composite"
-
-	SourceRequest  AttributeType = "request"
-	SourceResponse AttributeType = "response"
-)
-
-type AttributeType string
-
-type Attribute struct {
-	Key    string        `yaml:"key" mapstructure:"key"`
-	Type   AttributeType `yaml:"type" mapstructure:"type"`
-	Index  string        `yaml:"index" mapstructure:"index"` // proto index
-	Source string        `yaml:"source" mapstructure:"source"`
-	Value  string        `yaml:"value" mapstructure:"value"`
-}
-
 func ExtractHook(r *http.Request, name string) (rule.HookSpec, bool) {
 	rl, ok := ExtractRule(r)
 	if !ok {
diff --git a/internal/proxy/middleware/attributes/attributes.go b/internal/proxy/middleware/attributes/attributes.go
index 67f2bc21a..2fdc12111 100644
--- a/internal/proxy/middleware/attributes/attributes.go
+++ b/internal/proxy/middleware/attributes/attributes.go
@@ -12,6 +12,7 @@ import (
 
 	"github.com/goto/salt/log"
 	"github.com/goto/shield/core/project"
+	"github.com/goto/shield/internal/proxy/attribute"
 	"github.com/goto/shield/internal/proxy/middleware"
 	"github.com/goto/shield/pkg/body_extractor"
 )
@@ -24,7 +25,7 @@ type Attributes struct {
 }
 
 type Config struct {
-	Attributes map[string]middleware.Attribute `yaml:"attributes" mapstructure:"attributes"`
+	Attributes map[string]attribute.Attribute `yaml:"attributes" mapstructure:"attributes"`
 }
 
 type ProjectService interface {
@@ -86,7 +87,7 @@ func (a *Attributes) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 		_ = res
 
 		switch attr.Type {
-		case middleware.AttributeTypeGRPCPayload:
+		case attribute.AttributeTypeGRPCPayload:
 			// check if grpc request
 			if !strings.HasPrefix(req.Header.Get("Content-Type"), "application/grpc") {
 				a.log.Error("middleware: not a grpc request", "attr", attr)
@@ -105,7 +106,7 @@ func (a *Attributes) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 			requestAttributes[res] = payloadField
 			a.log.Info("middleware: extracted", "field", payloadField, "attr", attr)
 
-		case middleware.AttributeTypeJSONPayload:
+		case attribute.AttributeTypeJSONPayload:
 			if attr.Key == "" {
 				a.log.Error("middleware: payload key field empty")
 				a.notAllowed(rw)
@@ -121,7 +122,7 @@ func (a *Attributes) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 			requestAttributes[res] = payloadField
 			a.log.Info("middleware: extracted", "field", payloadField, "attr", attr)
 
-		case middleware.AttributeTypeHeader:
+		case attribute.AttributeTypeHeader:
 			if attr.Key == "" {
 				a.log.Error("middleware: header key field empty")
 				a.notAllowed(rw)
@@ -137,7 +138,7 @@ func (a *Attributes) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 			requestAttributes[res] = headerAttr
 			a.log.Info("middleware: extracted", "field", headerAttr, "attr", attr)
 
-		case middleware.AttributeTypeQuery:
+		case attribute.AttributeTypeQuery:
 			if attr.Key == "" {
 				a.log.Error("middleware: query key field empty")
 				a.notAllowed(rw)
@@ -153,7 +154,7 @@ func (a *Attributes) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 			requestAttributes[res] = queryAttr
 			a.log.Info("middleware: extracted", "field", queryAttr, "attr", attr)
 
-		case middleware.AttributeTypeConstant:
+		case attribute.AttributeTypeConstant:
 			if attr.Value == "" {
 				a.log.Error("middleware: constant value empty")
 				a.notAllowed(rw)
diff --git a/internal/proxy/middleware/authz/authz.go b/internal/proxy/middleware/authz/authz.go
index 587f19c1c..fa6b0b620 100644
--- a/internal/proxy/middleware/authz/authz.go
+++ b/internal/proxy/middleware/authz/authz.go
@@ -14,7 +14,7 @@ import (
 	"github.com/goto/shield/core/group"
 	"github.com/goto/shield/core/resource"
 	"github.com/goto/shield/core/user"
-	"github.com/goto/shield/internal/proxy"
+	"github.com/goto/shield/internal/proxy/attribute"
 	"github.com/goto/shield/internal/proxy/middleware"
 	"github.com/goto/shield/internal/schema"
 	"github.com/goto/shield/pkg/body_extractor"
@@ -44,9 +44,9 @@ type Authz struct {
 }
 
 type Config struct {
-	Actions     []string                        `yaml:"actions" mapstructure:"actions"`
-	Permissions []Permission                    `yaml:"permissions" mapstructure:"permissions"`
-	Attributes  map[string]middleware.Attribute `yaml:"attributes" mapstructure:"attributes"`
+	Actions     []string                       `yaml:"actions" mapstructure:"actions"`
+	Permissions []Permission                   `yaml:"permissions" mapstructure:"permissions"`
+	Attributes  map[string]attribute.Attribute `yaml:"attributes" mapstructure:"attributes"`
 }
 
 type Permission struct {
@@ -133,7 +133,7 @@ func (c *Authz) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 		_ = res
 
 		switch attr.Type {
-		case middleware.AttributeTypeGRPCPayload:
+		case attribute.AttributeTypeGRPCPayload:
 			// check if grpc request
 			if !strings.HasPrefix(req.Header.Get("Content-Type"), "application/grpc") {
 				c.log.Error("middleware: not a grpc request", "attr", attr)
@@ -151,7 +151,7 @@ func (c *Authz) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 			permissionAttributes[res] = payloadField
 			c.log.Info("middleware: extracted", "field", payloadField, "attr", attr)
 
-		case middleware.AttributeTypeJSONPayload:
+		case attribute.AttributeTypeJSONPayload:
 			if attr.Key == "" {
 				c.log.Error("middleware: payload key field empty")
 				c.notAllowed(rw, nil)
@@ -167,7 +167,7 @@ func (c *Authz) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 			permissionAttributes[res] = payloadField
 			c.log.Info("middleware: extracted", "field", payloadField, "attr", attr)
 
-		case middleware.AttributeTypeHeader:
+		case attribute.AttributeTypeHeader:
 			if attr.Key == "" {
 				c.log.Error("middleware: header key field empty")
 				c.notAllowed(rw, nil)
@@ -183,7 +183,7 @@ func (c *Authz) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 			permissionAttributes[res] = headerAttr
 			c.log.Info("middleware: extracted", "field", headerAttr, "attr", attr)
 
-		case middleware.AttributeTypeQuery:
+		case attribute.AttributeTypeQuery:
 			if attr.Key == "" {
 				c.log.Error("middleware: query key field empty")
 				c.notAllowed(rw, nil)
@@ -199,7 +199,7 @@ func (c *Authz) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 			permissionAttributes[res] = queryAttr
 			c.log.Info("middleware: extracted", "field", queryAttr, "attr", attr)
 
-		case middleware.AttributeTypeConstant:
+		case attribute.AttributeTypeConstant:
 			if attr.Value == "" {
 				c.log.Error("middleware: constant value empty")
 				c.notAllowed(rw, nil)
@@ -279,7 +279,7 @@ func (c *Authz) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 func (c Authz) preparePermissionResource(ctx context.Context, perm Permission, attrs map[string]interface{}) (resource.Resource, error) {
 	resourceName, ok := attrs[perm.Attribute].(string)
 	if !ok {
-		resourceName = proxy.ComposeAttribute(perm.Attribute, attrs)
+		resourceName = attribute.ComposeAttribute(perm.Attribute, attrs)
 	}
 
 	res := resource.Resource{
diff --git a/internal/proxy/middleware/basic_auth/auth.go b/internal/proxy/middleware/basic_auth/auth.go
index 585abd8f8..fe179abcb 100644
--- a/internal/proxy/middleware/basic_auth/auth.go
+++ b/internal/proxy/middleware/basic_auth/auth.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 	"text/template"
 
+	"github.com/goto/shield/internal/proxy/attribute"
 	"github.com/goto/shield/internal/proxy/middleware"
 	"github.com/goto/shield/pkg/body_extractor"
 	"github.com/goto/shield/pkg/httputil"
@@ -53,8 +54,8 @@ type Credentials struct {
 }
 
 type Scope struct {
-	Action     string                          `yaml:"action" mapstructure:"action"`
-	Attributes map[string]middleware.Attribute `yaml:"attributes" mapstructure:"attributes"` // auth field -> Attribute
+	Action     string                         `yaml:"action" mapstructure:"action"`
+	Attributes map[string]attribute.Attribute `yaml:"attributes" mapstructure:"attributes"` // auth field -> Attribute
 }
 
 func New(logger log.Logger, next http.Handler) *BasicAuth {
@@ -139,7 +140,7 @@ func (w BasicAuth) authorizeRequest(conf Config, user string, req *http.Request)
 	for res, attr := range conf.Scope.Attributes {
 		templateMap[res] = ""
 		switch attr.Type {
-		case middleware.AttributeTypeGRPCPayload:
+		case attribute.AttributeTypeGRPCPayload:
 			// check if grpc request
 			if !strings.HasPrefix(req.Header.Get("Content-Type"), "application/grpc") {
 				w.log.Error("middleware: not a valid grpc request")
@@ -155,7 +156,7 @@ func (w BasicAuth) authorizeRequest(conf Config, user string, req *http.Request)
 
 			templateMap[res] = payloadField
 			w.log.Debug("middleware: extracted", "field", payloadField, "attr", attr)
-		case middleware.AttributeTypeJSONPayload:
+		case attribute.AttributeTypeJSONPayload:
 			if attr.Key == "" {
 				w.log.Error("middleware: payload key field empty")
 				return false
diff --git a/test/e2e_test/testbench/testdata/configs/rules/rule.yaml b/test/e2e_test/testbench/testdata/configs/rules/rule.yaml
index e7db87f6c..92f2ad785 100644
--- a/test/e2e_test/testbench/testdata/configs/rules/rule.yaml
+++ b/test/e2e_test/testbench/testdata/configs/rules/rule.yaml
@@ -1,7 +1,7 @@
 rules:
   - backends:
       - name: entropy
-        target: "http://localhost:51612"
+        target: "http://localhost:53123"
         frontends:
           - name: ping
             path: "/api/ping"