diff --git a/internal/cmd/billing.go b/internal/cmd/billing.go
new file mode 100644
index 0000000..7c17c30
--- /dev/null
+++ b/internal/cmd/billing.go
@@ -0,0 +1,33 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var billingCmd = &cobra.Command{
+	Use:   "billing",
+	Short: "Billing and orders",
+}
+
+var ordersCmd = &cobra.Command{
+	Use:   "orders",
+	Short: "List orders",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		svc := prov.Billing()
+		if svc == nil {
+			return fmt.Errorf("billing not supported by current provider")
+		}
+		orders, err := svc.Orders(cmd.Context())
+		if err != nil {
+			return err
+		}
+		return out.Print(orders)
+	},
+}
+
+func init() {
+	billingCmd.AddCommand(ordersCmd)
+	rootCmd.AddCommand(billingCmd)
+}
diff --git a/internal/cmd/config_cmd.go b/internal/cmd/config_cmd.go
new file mode 100644
index 0000000..b27d07f
--- /dev/null
+++ b/internal/cmd/config_cmd.go
@@ -0,0 +1,74 @@
+package cmd
+
+import (
+	"fmt"
+	"strings"
+
+	"git.yoresee.cc/nightstar/ry/internal/config"
+
+	"github.com/spf13/cobra"
+)
+
+var configCmd = &cobra.Command{
+	Use:   "config",
+	Short: "Manage ry configuration",
+}
+
+var configShowCmd = &cobra.Command{
+	Use:   "show",
+	Short: "Show current configuration",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		fmt.Printf("Config file: %s\n", cfgPath)
+		fmt.Printf("Current provider: %s\n", cfg.CurrentProvider)
+		fmt.Printf("Output format: %s\n", cfg.Output)
+		fmt.Println("Providers:")
+		for name, pc := range cfg.Providers {
+			masked := pc.APIKey
+			if len(masked) > 4 {
+				masked = masked[:2] + strings.Repeat("*", len(masked)-4) + masked[len(masked)-2:]
+			}
+			marker := " "
+			if name == cfg.CurrentProvider {
+				marker = "*"
+			}
+			fmt.Printf("  %s %s: api_key=%s\n", marker, name, masked)
+		}
+		return nil
+	},
+}
+
+var configSetCmd = &cobra.Command{
+	Use:   "set <key> <value>",
+	Short: "Set a config value",
+	Args:  cobra.ExactArgs(2),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		key, value := args[0], args[1]
+		switch key {
+		case "output":
+			cfg.Output = value
+		default:
+			return fmt.Errorf("unknown config key: %s", key)
+		}
+		if err := config.Save(cfgPath, cfg); err != nil {
+			return fmt.Errorf("save config: %w", err)
+		}
+		fmt.Printf("Set %s = %s\n", key, value)
+		return nil
+	},
+}
+
+var configPathCmd = &cobra.Command{
+	Use:   "path",
+	Short: "Print config file path",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		fmt.Println(cfgPath)
+		return nil
+	},
+}
+
+func init() {
+	configCmd.AddCommand(configShowCmd)
+	configCmd.AddCommand(configSetCmd)
+	configCmd.AddCommand(configPathCmd)
+	rootCmd.AddCommand(configCmd)
+}
diff --git a/internal/cmd/domain.go b/internal/cmd/domain.go
new file mode 100644
index 0000000..9c61323
--- /dev/null
+++ b/internal/cmd/domain.go
@@ -0,0 +1,97 @@
+package cmd
+
+import (
+	"fmt"
+
+	"git.yoresee.cc/nightstar/ry/internal/provider"
+
+	"github.com/spf13/cobra"
+)
+
+var domainCmd = &cobra.Command{
+	Use:   "domain",
+	Short: "Manage domains",
+}
+
+var domainListCmd = &cobra.Command{
+	Use:   "list",
+	Short: "List domains",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		svc := prov.Domain()
+		if svc == nil {
+			return fmt.Errorf("domain management not supported by current provider")
+		}
+		domains, err := svc.List(cmd.Context())
+		if err != nil {
+			return err
+		}
+		return out.Print(domains)
+	},
+}
+
+var dnsCmd = &cobra.Command{
+	Use:   "dns <domain>",
+	Short: "Manage DNS records",
+	Args:  cobra.MinimumNArgs(1),
+}
+
+var dnsListCmd = &cobra.Command{
+	Use:   "list",
+	Short: "List DNS records",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		svc := prov.Domain()
+		if svc == nil {
+			return fmt.Errorf("domain management not supported")
+		}
+		records, err := svc.DNSList(cmd.Context(), args[0])
+		if err != nil {
+			return err
+		}
+		return out.Print(records)
+	},
+}
+
+var dnsAddCmd = &cobra.Command{
+	Use:   "add",
+	Short: "Add a DNS record",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		svc := prov.Domain()
+		if svc == nil {
+			return fmt.Errorf("domain management not supported")
+		}
+		recType, _ := cmd.Flags().GetString("type")
+		name, _ := cmd.Flags().GetString("name")
+		value, _ := cmd.Flags().GetString("value")
+		ttl, _ := cmd.Flags().GetInt("ttl")
+		return svc.DNSAdd(cmd.Context(), args[0],
+			provider.DNSRecord{Type: recType, Name: name, Value: value, TTL: ttl})
+	},
+}
+
+var dnsDeleteCmd = &cobra.Command{
+	Use:   "delete <record-id>",
+	Short: "Delete a DNS record",
+	Args:  cobra.ExactArgs(2),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		svc := prov.Domain()
+		if svc == nil {
+			return fmt.Errorf("domain management not supported")
+		}
+		return svc.DNSDelete(cmd.Context(), args[0], args[1])
+	},
+}
+
+func init() {
+	dnsAddCmd.Flags().String("type", "A", "Record type (A, CNAME, TXT)")
+	dnsAddCmd.Flags().String("name", "@", "Record name")
+	dnsAddCmd.Flags().String("value", "", "Record value")
+	dnsAddCmd.Flags().Int("ttl", 600, "TTL in seconds")
+	dnsAddCmd.MarkFlagRequired("value")
+
+	dnsCmd.AddCommand(dnsListCmd)
+	dnsCmd.AddCommand(dnsAddCmd)
+	dnsCmd.AddCommand(dnsDeleteCmd)
+	domainCmd.AddCommand(domainListCmd)
+	domainCmd.AddCommand(dnsCmd)
+	rootCmd.AddCommand(domainCmd)
+}
diff --git a/internal/cmd/storage.go b/internal/cmd/storage.go
new file mode 100644
index 0000000..1e9655f
--- /dev/null
+++ b/internal/cmd/storage.go
@@ -0,0 +1,75 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var storageCmd = &cobra.Command{
+	Use:   "storage",
+	Short: "Manage object storage",
+}
+
+var storageListCmd = &cobra.Command{
+	Use:   "list",
+	Short: "List storage instances",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		svc := prov.Storage()
+		if svc == nil {
+			return fmt.Errorf("storage management not supported by current provider")
+		}
+		instances, err := svc.List(cmd.Context())
+		if err != nil {
+			return err
+		}
+		return out.Print(instances)
+	},
+}
+
+var bucketCmd = &cobra.Command{
+	Use:   "bucket <instance-id>",
+	Short: "Manage buckets",
+	Args:  cobra.ExactArgs(1),
+}
+
+var bucketListCmd = &cobra.Command{
+	Use:   "list",
+	Short: "List buckets",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		svc := prov.Storage()
+		if svc == nil {
+			return fmt.Errorf("storage management not supported")
+		}
+		buckets, err := svc.BucketList(cmd.Context(), args[0])
+		if err != nil {
+			return err
+		}
+		return out.Print(buckets)
+	},
+}
+
+var bucketCreateCmd = &cobra.Command{
+	Use:   "create <name>",
+	Short: "Create a bucket",
+	Args:  cobra.ExactArgs(2),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		svc := prov.Storage()
+		if svc == nil {
+			return fmt.Errorf("storage management not supported")
+		}
+		if err := svc.BucketCreate(cmd.Context(), args[0], args[1]); err != nil {
+			return err
+		}
+		fmt.Printf("Bucket %q created\n", args[1])
+		return nil
+	},
+}
+
+func init() {
+	bucketCmd.AddCommand(bucketListCmd)
+	bucketCmd.AddCommand(bucketCreateCmd)
+	storageCmd.AddCommand(storageListCmd)
+	storageCmd.AddCommand(bucketCmd)
+	rootCmd.AddCommand(storageCmd)
+}
diff --git a/internal/provider/rainyun/billing.go b/internal/provider/rainyun/billing.go
new file mode 100644
index 0000000..70932c1
--- /dev/null
+++ b/internal/provider/rainyun/billing.go
@@ -0,0 +1,40 @@
+package rainyun
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"git.yoresee.cc/nightstar/ry/internal/provider"
+)
+
+type BillingService struct {
+	client *client
+}
+
+func (b *BillingService) Orders(ctx context.Context) ([]provider.Order, error) {
+	type rainyunOrder struct {
+		ID          int     `json:"id"`
+		ProductName string  `json:"product_name"`
+		Amount      float64 `json:"amount"`
+		Status      string  `json:"status"`
+		CreateDate  string  `json:"create_date"`
+	}
+	var raw []rainyunOrder
+	if err := b.client.get(ctx, "/expense/orders/list", &raw); err != nil {
+		return nil, err
+	}
+	orders := make([]provider.Order, len(raw))
+	for i, r := range raw {
+		t, _ := time.Parse("2006-01-02 15:04:05", r.CreateDate)
+		orders[i] = provider.Order{
+			ID:      fmt.Sprintf("%d", r.ID),
+			Product: r.ProductName,
+			Amount:  r.Amount,
+			Status:  r.Status,
+			Created: t,
+			Raw:     r,
+		}
+	}
+	return orders, nil
+}
diff --git a/internal/provider/rainyun/domain.go b/internal/provider/rainyun/domain.go
new file mode 100644
index 0000000..55ba8c6
--- /dev/null
+++ b/internal/provider/rainyun/domain.go
@@ -0,0 +1,76 @@
+package rainyun
+
+import (
+	"context"
+	"fmt"
+
+	"git.yoresee.cc/nightstar/ry/internal/provider"
+)
+
+type DomainService struct {
+	client *client
+}
+
+type rainyunDomain struct {
+	ID         int    `json:"id"`
+	DomainName string `json:"domain_name"`
+	Status     string `json:"status"`
+	ExpireDate string `json:"expire_date"`
+}
+
+func (d *DomainService) List(ctx context.Context) ([]provider.Domain, error) {
+	var raw []rainyunDomain
+	if err := d.client.get(ctx, "/product/domain/", &raw); err != nil {
+		return nil, err
+	}
+	domains := make([]provider.Domain, len(raw))
+	for i, r := range raw {
+		domains[i] = provider.Domain{
+			ID:   fmt.Sprintf("%d", r.ID),
+			Name: r.DomainName,
+		}
+	}
+	return domains, nil
+}
+
+func (d *DomainService) DNSList(ctx context.Context, domain string) ([]provider.DNSRecord, error) {
+	type rainyunDNSRecord struct {
+		ID         int    `json:"id"`
+		RecordType string `json:"record_type"`
+		Host       string `json:"host"`
+		Value      string `json:"value"`
+		TTL        int    `json:"ttl"`
+	}
+	var raw []rainyunDNSRecord
+	path := fmt.Sprintf("/product/domain/%s/dns/", domain)
+	if err := d.client.get(ctx, path, &raw); err != nil {
+		return nil, err
+	}
+	records := make([]provider.DNSRecord, len(raw))
+	for i, r := range raw {
+		records[i] = provider.DNSRecord{
+			ID:    fmt.Sprintf("%d", r.ID),
+			Type:  r.RecordType,
+			Name:  r.Host,
+			Value: r.Value,
+			TTL:   r.TTL,
+		}
+	}
+	return records, nil
+}
+
+func (d *DomainService) DNSAdd(ctx context.Context, domain string, record provider.DNSRecord) error {
+	body := map[string]any{
+		"record_type": record.Type,
+		"host":        record.Name,
+		"value":       record.Value,
+		"ttl":         record.TTL,
+	}
+	path := fmt.Sprintf("/product/domain/%s/dns", domain)
+	return d.client.post(ctx, path, body, nil)
+}
+
+func (d *DomainService) DNSDelete(ctx context.Context, domain string, recordID string) error {
+	path := fmt.Sprintf("/product/domain/%s/dns/%s", domain, recordID)
+	return d.client.delete(ctx, path, nil)
+}
diff --git a/internal/provider/rainyun/rainyun.go b/internal/provider/rainyun/rainyun.go
index 09424e9..e827d20 100644
--- a/internal/provider/rainyun/rainyun.go
+++ b/internal/provider/rainyun/rainyun.go
@@ -12,8 +12,11 @@ func init() {
 
 // Rainyun provider — 雨云 cloud platform.
 type Rainyun struct {
-	client *client
-	server *ServerService
+	client  *client
+	server  *ServerService
+	domain  *DomainService
+	storage *StorageService
+	billing *BillingService
 }
 
 // New creates a Rainyun provider from config.
@@ -21,6 +24,9 @@ func New(cfg provider.ProviderConfig) (provider.Provider, error) {
 	c := newClient(cfg.Endpoint, cfg.APIKey)
 	r := &Rainyun{client: c}
 	r.server = &ServerService{client: c}
+	r.domain = &DomainService{client: c}
+	r.storage = &StorageService{client: c}
+	r.billing = &BillingService{client: c}
 	return r, nil
 }
 
@@ -39,7 +45,7 @@ func (r *Rainyun) Server() provider.ServerService {
 	}
 	return r.server
 }
-func (r *Rainyun) Domain() provider.DomainService   { return nil }
-func (r *Rainyun) Storage() provider.StorageService { return nil }
+func (r *Rainyun) Domain() provider.DomainService   { return r.domain }
+func (r *Rainyun) Storage() provider.StorageService { return r.storage }
 func (r *Rainyun) CDN() provider.CDNService         { return nil }
-func (r *Rainyun) Billing() provider.BillingService { return nil }
+func (r *Rainyun) Billing() provider.BillingService { return r.billing }
diff --git a/internal/provider/rainyun/storage.go b/internal/provider/rainyun/storage.go
new file mode 100644
index 0000000..c168485
--- /dev/null
+++ b/internal/provider/rainyun/storage.go
@@ -0,0 +1,59 @@
+package rainyun
+
+import (
+	"context"
+	"fmt"
+
+	"git.yoresee.cc/nightstar/ry/internal/provider"
+)
+
+type StorageService struct {
+	client *client
+}
+
+func (s *StorageService) List(ctx context.Context) ([]provider.StorageInstance, error) {
+	var raw []struct {
+		ID     int    `json:"id"`
+		Name   string `json:"name"`
+		Status string `json:"status"`
+	}
+	if err := s.client.get(ctx, "/product/ros/instance", &raw); err != nil {
+		return nil, err
+	}
+	instances := make([]provider.StorageInstance, len(raw))
+	for i, r := range raw {
+		instances[i] = provider.StorageInstance{
+			ID:   fmt.Sprintf("%d", r.ID),
+			Name: r.Name,
+			Raw:  r,
+		}
+	}
+	return instances, nil
+}
+
+func (s *StorageService) BucketList(ctx context.Context, instanceID string) ([]provider.Bucket, error) {
+	type rainyunBucket struct {
+		ID     int    `json:"id"`
+		Name   string `json:"name"`
+		Region string `json:"region"`
+	}
+	var raw []rainyunBucket
+	path := fmt.Sprintf("/product/ros/bucket/%s", instanceID)
+	if err := s.client.get(ctx, path, &raw); err != nil {
+		return nil, err
+	}
+	buckets := make([]provider.Bucket, len(raw))
+	for i, r := range raw {
+		buckets[i] = provider.Bucket{
+			ID:   fmt.Sprintf("%d", r.ID),
+			Name: r.Name,
+		}
+	}
+	return buckets, nil
+}
+
+func (s *StorageService) BucketCreate(ctx context.Context, instanceID, name string) error {
+	body := map[string]string{"name": name}
+	path := fmt.Sprintf("/product/ros/bucket/%s", instanceID)
+	return s.client.post(ctx, path, body, nil)
+}