diff --git a/cdata/go.mod b/cdata/go.mod
new file mode 100644
index 0000000..dcab3be
--- /dev/null
+++ b/cdata/go.mod
@@ -0,0 +1,8 @@
+module git.blauwelle.com/go/crate/cdata
+
+go 1.21.3
+
+require (
+	git.blauwelle.com/go/crate/cerrors v0.1.0
+	git.blauwelle.com/go/crate/runtimehelper v0.2.0
+)
diff --git a/cdata/go.sum b/cdata/go.sum
new file mode 100644
index 0000000..6023c68
--- /dev/null
+++ b/cdata/go.sum
@@ -0,0 +1,6 @@
+git.blauwelle.com/go/crate/cerrors v0.0.0-20240507062518-e2f234c17eb2 h1:h3WnMe7tQNbh6WARbixrf8wTUrWCDNc3F6ikb1HQhj4=
+git.blauwelle.com/go/crate/cerrors v0.0.0-20240507062518-e2f234c17eb2/go.mod h1:vIWWWVAEwattbg1eVOUjnz5dEG7q7v/Ve0oR1HFsblM=
+git.blauwelle.com/go/crate/cerrors v0.1.0 h1:+9TdG54+AUG1NmUgrEPsAPY8n8RIUAQy9qx4drU9RtE=
+git.blauwelle.com/go/crate/cerrors v0.1.0/go.mod h1:vIWWWVAEwattbg1eVOUjnz5dEG7q7v/Ve0oR1HFsblM=
+git.blauwelle.com/go/crate/runtimehelper v0.2.0 h1:W19wipPCyFSGHOWzqtfouNJu7MDeJobP+iRM4bPiJpM=
+git.blauwelle.com/go/crate/runtimehelper v0.2.0/go.mod h1:yVMA0GkO9AS7iuPmalHKeWyv9en0JWj25rY1vpTuHhk=
diff --git a/cdata/response.go b/cdata/response.go
new file mode 100644
index 0000000..077e182
--- /dev/null
+++ b/cdata/response.go
@@ -0,0 +1,64 @@
+package cdata
+
+import (
+	"errors"
+
+	"git.blauwelle.com/go/crate/cerrors"
+	"git.blauwelle.com/go/crate/runtimehelper"
+)
+
+const maximumFrames = 16
+
+type Response[T any] struct {
+	Data      T                     `json:"data,omitempty"`
+	Code      cerrors.Code          `json:"code"`
+	Message   string                `json:"message,omitempty"`
+	Debug     string                `json:"debug,omitempty"`
+	Traceback []runtimehelper.Frame `json:"traceback,omitempty"`
+}
+
+type PageData[T any] struct {
+	List      []T `json:"list"`
+	PageIndex int `json:"pageIndex"` // >=1
+	PageSize  int `json:"pageSize"`  // >=1
+	Total     int `json:"total"`     // maybe 0
+}
+
+func NewOkResponse[T any](data T) Response[T] {
+	return Response[T]{
+		Code: cerrors.CodeOK,
+		Data: data,
+	}
+}
+
+func NewResponseFromError(err error) Response[struct{}] {
+	e := &cerrors.Error{}
+	if !errors.As(err, &e) {
+		response := Response[struct{}]{
+			Code:    cerrors.CodeUnknown,
+			Message: "未知错误",
+		}
+		if cerrors.FlagDebug {
+			response.Debug = err.Error()
+			response.Traceback = runtimehelper.Stack(1, maximumFrames)
+		}
+		return response
+	}
+	return Response[struct{}]{
+		Code:      e.Code,
+		Message:   e.Message,
+		Debug:     e.Debug,
+		Traceback: e.Traceback,
+	}
+}
+
+func NewErrorResponse(code cerrors.Code, message string) Response[struct{}] {
+	response := Response[struct{}]{
+		Code:    code,
+		Message: message,
+	}
+	if cerrors.FlagDebug {
+		response.Traceback = runtimehelper.Stack(1, maximumFrames)
+	}
+	return response
+}