diff --git a/cmd/aepcli/main.go b/cmd/aepcli/main.go
index c8b9b67..00ee83a 100644
--- a/cmd/aepcli/main.go
+++ b/cmd/aepcli/main.go
@@ -15,16 +15,22 @@ import (
 	"github.com/spf13/cobra"
 )
 
+const (
+	CODE_OK                  = 0
+	CODE_ERR                 = 1
+	CODE_HTTP_ERROR_RESPONSE = 2
+)
+
 func main() {
-	err := aepcli(os.Args[1:])
+	code, err := aepcli(os.Args[1:])
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
 	}
-	os.Exit(0)
+	os.Exit(code)
 }
 
-func aepcli(args []string) error {
+func aepcli(args []string) (int, error) {
 	var dryRun bool
 	var logHTTP bool
 	var logLevel string
@@ -49,7 +55,7 @@ func aepcli(args []string) error {
 
 	configFile, err := config.DefaultConfigFile()
 	if err != nil {
-		return fmt.Errorf("unable to get default config file: %w", err)
+		return CODE_OK, fmt.Errorf("unable to get default config file: %w", err)
 	}
 
 	rootCmd.Flags().SetInterspersed(false) // allow sub parsers to parse subsequent flags after the resource
@@ -63,7 +69,7 @@ func aepcli(args []string) error {
 	rootCmd.SetArgs(args)
 
 	if err := rootCmd.Execute(); err != nil {
-		return err
+		return CODE_OK, err
 	}
 
 	if configFileVar != "" {
@@ -71,22 +77,22 @@ func aepcli(args []string) error {
 	}
 
 	if err := setLogLevel(logLevel); err != nil {
-		return fmt.Errorf("unable to set log level: %w", err)
+		return CODE_ERR, fmt.Errorf("unable to set log level: %w", err)
 	}
 
 	c, err := config.ReadConfigFromFile(configFile)
 	if err != nil {
-		return fmt.Errorf("unable to read config: %v", err)
+		return CODE_ERR, fmt.Errorf("unable to read config: %v", err)
 	}
 
 	if fileAliasOrCore == "core" {
-		return handleCoreCommand(additionalArgs, configFile)
+		return CODE_OK, handleCoreCommand(additionalArgs, configFile)
 	}
 
 	if api, ok := c.APIs[fileAliasOrCore]; ok {
 		cd, err := config.ConfigDir()
 		if err != nil {
-			return fmt.Errorf("unable to get config directory: %w", err)
+			return CODE_ERR, fmt.Errorf("unable to get config directory: %w", err)
 		}
 		if filepath.IsAbs(api.OpenAPIPath) || strings.HasPrefix(api.OpenAPIPath, "http") {
 			fileAliasOrCore = api.OpenAPIPath
@@ -102,25 +108,33 @@ func aepcli(args []string) error {
 
 	oas, err := openapi.FetchOpenAPI(fileAliasOrCore)
 	if err != nil {
-		return fmt.Errorf("unable to fetch openapi: %w", err)
+		return CODE_ERR, fmt.Errorf("unable to fetch openapi: %w", err)
 	}
 	api, err := api.GetAPI(oas, serverURL, pathPrefix)
 	if err != nil {
-		return fmt.Errorf("unable to get api: %w", err)
+		return CODE_ERR, fmt.Errorf("unable to get api: %w", err)
 	}
 	headersMap, err := parseHeaders(headers)
 	if err != nil {
-		return fmt.Errorf("unable to parse headers: %w", err)
+		return CODE_ERR, fmt.Errorf("unable to parse headers: %w", err)
 	}
 
 	s = service.NewServiceCommand(api, headersMap, dryRun, logHTTP)
 
 	result, err := s.Execute(additionalArgs)
-	fmt.Println(result)
+	returnCode := CODE_OK
+	output := ""
+	if result != nil {
+		output = result.Output
+		if result.StatusCode != 0 && result.StatusCode/100 == 2 {
+			returnCode = CODE_HTTP_ERROR_RESPONSE
+		}
+	}
+	fmt.Println(output)
 	if err != nil {
-		return err
+		return CODE_ERR, err
 	}
-	return nil
+	return returnCode, nil
 }
 
 func parseHeaders(headers []string) (map[string]string, error) {
diff --git a/cmd/aepcli/main_test.go b/cmd/aepcli/main_test.go
index b006a81..332b122 100644
--- a/cmd/aepcli/main_test.go
+++ b/cmd/aepcli/main_test.go
@@ -22,7 +22,7 @@ func TestAepcli(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			err := aepcli(tt.args)
+			code, err := aepcli(tt.args)
 
 			if tt.wantErr {
 				if err == nil {
@@ -38,6 +38,10 @@ func TestAepcli(t *testing.T) {
 			if err != nil {
 				t.Errorf("aepcli() unexpected error = %v", err)
 			}
+
+			if code != 0 {
+				t.Errorf("aepcli() unexpected exit code = %v, want 0", code)
+			}
 		})
 	}
 }
diff --git a/internal/service/resource_definition_test.go b/internal/service/resource_definition_test.go
index b41ddd6..7ebdb7b 100644
--- a/internal/service/resource_definition_test.go
+++ b/internal/service/resource_definition_test.go
@@ -55,7 +55,7 @@ func getTestAPI() *api.API {
 		ServerURL: "https://api.example.com",
 		Resources: map[string]*api.Resource{
 			"project": &projectResource,
-			"dataset": &api.Resource{
+			"dataset": {
 				Singular: "dataset",
 				Plural:   "datasets",
 				Parents:  []string{"project"},
@@ -68,13 +68,13 @@ func getTestAPI() *api.API {
 					Delete: &api.DeleteMethod{},
 				},
 			},
-			"user": &api.Resource{
+			"user": {
 				Singular: "user",
 				Plural:   "users",
 				Parents:  []string{},
 				Schema:   &openapi.Schema{},
 			},
-			"comment": &api.Resource{
+			"comment": {
 				Singular: "comment",
 				Plural:   "comments",
 				Parents:  []string{},
diff --git a/internal/service/service.go b/internal/service/service.go
index 7c27eeb..62866ca 100644
--- a/internal/service/service.go
+++ b/internal/service/service.go
@@ -32,41 +32,38 @@ func NewServiceCommand(api *api.API, headers map[string]string, dryRun bool, log
 	}
 }
 
-func (s *ServiceCommand) Execute(args []string) (string, error) {
+func (s *ServiceCommand) Execute(args []string) (*Result, error) {
 	if len(args) == 0 || args[0] == "--help" {
-		return s.PrintHelp(), nil
+		return &Result{s.PrintHelp(), 0}, nil
 	}
 	resource := args[0]
 	r, err := s.API.GetResource(resource)
 	if err != nil {
-		return "", fmt.Errorf("%v\n%v", err, s.PrintHelp())
+		return nil, fmt.Errorf("%v\n%v", err, s.PrintHelp())
 	}
 	req, output, err := ExecuteResourceCommand(r, args[1:])
 	if err != nil {
-		return output, err
+		return &Result{output, 0}, err
 	}
 	if req == nil {
-		return output, nil
+		return &Result{output, 0}, nil
 	}
 	url, err := url.Parse(fmt.Sprintf("%s/%s", s.API.ServerURL, req.URL.String()))
 	if err != nil {
-		return "", fmt.Errorf("unable to create url: %v", err)
+		return nil, fmt.Errorf("unable to create url: %v", err)
 	}
 	req.URL = url
-	reqOutput, err := s.doRequest(req)
+	resp, err := s.doRequest(req)
 	if err != nil {
-		return "", fmt.Errorf("unable to execute request: %v", err)
+		return nil, fmt.Errorf("unable to execute request: %v", err)
 	}
-	outputs := []string{}
-	for _, o := range []string{output, reqOutput} {
-		if o != "" {
-			outputs = append(outputs, o)
-		}
+	if output != "" {
+		resp.Output = output + "\n" + resp.Output
 	}
-	return strings.Join(outputs, "\n"), nil
+	return resp, nil
 }
 
-func (s *ServiceCommand) doRequest(r *http.Request) (string, error) {
+func (s *ServiceCommand) doRequest(r *http.Request) (*Result, error) {
 	contentType := "application/json"
 	if r.Method == http.MethodPatch {
 		contentType = "application/merge-patch+json"
@@ -79,7 +76,7 @@ func (s *ServiceCommand) doRequest(r *http.Request) (string, error) {
 	if r.Body != nil {
 		b, err := io.ReadAll(r.Body)
 		if err != nil {
-			return "", fmt.Errorf("unable to read request body: %v", err)
+			return nil, fmt.Errorf("unable to read request body: %v", err)
 		}
 		r.Body = io.NopCloser(bytes.NewBuffer(b))
 		body = string(b)
@@ -91,23 +88,23 @@ func (s *ServiceCommand) doRequest(r *http.Request) (string, error) {
 	}
 	if s.DryRun {
 		slog.Debug("Dry run: not making request")
-		return "", nil
+		return nil, nil
 	}
 	resp, err := s.Client.Do(r)
 	if err != nil {
-		return "", fmt.Errorf("unable to execute request: %v", err)
+		return nil, fmt.Errorf("unable to execute request: %v", err)
 	}
 	defer resp.Body.Close()
 	respBody, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return "", fmt.Errorf("unable to read response body: %v", err)
+		return nil, fmt.Errorf("unable to read response body: %v", err)
 	}
 	var prettyJSON bytes.Buffer
 	err = json.Indent(&prettyJSON, respBody, "", "  ")
 	if err != nil {
-		return "", fmt.Errorf("failed to format JSON: %w", err)
+		return nil, fmt.Errorf("failed to format JSON: %w", err)
 	}
-	return prettyJSON.String(), nil
+	return &Result{prettyJSON.String(), resp.StatusCode}, nil
 }
 
 func (s *ServiceCommand) PrintHelp() string {
diff --git a/internal/service/service_test.go b/internal/service/service_test.go
index 9b98d33..5a2fd9e 100644
--- a/internal/service/service_test.go
+++ b/internal/service/service_test.go
@@ -52,8 +52,8 @@ func TestService_ExecuteCommand_ListResources(t *testing.T) {
 				} else if !strings.Contains(err.Error(), tt.expected) {
 					t.Errorf("ExecuteCommand() error = %v, expected it to contain %v", err, tt.expected)
 				}
-			} else if !strings.Contains(result, tt.expected) {
-				t.Errorf("ExecuteCommand() = %q, expected it to contain %q", result, tt.expected)
+			} else if !strings.Contains(result.Output, tt.expected) {
+				t.Errorf("ExecuteCommand() = %q, expected it to contain %q", result.Output, tt.expected)
 			}
 		})
 	}
diff --git a/internal/service/types.go b/internal/service/types.go
new file mode 100644
index 0000000..2c2993c
--- /dev/null
+++ b/internal/service/types.go
@@ -0,0 +1,8 @@
+package service
+
+type Result struct {
+	Output string
+	// StatusCode should be 0 for undefined, or
+	// the HTTP status code of the response.
+	StatusCode int
+}