diff --git a/client/http/interface.go b/client/http/interface.go
index 11c24beaefd..3684e19b1f5 100644
--- a/client/http/interface.go
+++ b/client/http/interface.go
@@ -49,6 +49,7 @@ type Client interface {
 	GetRegionStatusByKeyRange(context.Context, *KeyRange, bool) (*RegionStats, error)
 	GetStores(context.Context) (*StoresInfo, error)
 	GetStore(context.Context, uint64) (*StoreInfo, error)
+	DeleteStore(context.Context, uint64) error
 	SetStoreLabels(context.Context, int64, map[string]string) error
 	GetHealthStatus(context.Context) ([]Health, error)
 	/* Config-related interfaces */
@@ -440,6 +441,14 @@ func (c *client) GetStore(ctx context.Context, storeID uint64) (*StoreInfo, erro
 	return &store, nil
 }
 
+// DeleteStore deletes the store by ID.
+func (c *client) DeleteStore(ctx context.Context, storeID uint64) error {
+	return c.request(ctx, newRequestInfo().
+		WithName(deleteStoreName).
+		WithURI(StoreByID(storeID)).
+		WithMethod(http.MethodDelete))
+}
+
 // GetClusterVersion gets the cluster version.
 func (c *client) GetClusterVersion(ctx context.Context) (string, error) {
 	var version string
diff --git a/client/http/request_info.go b/client/http/request_info.go
index 3fb91c6ca97..40bd0368250 100644
--- a/client/http/request_info.go
+++ b/client/http/request_info.go
@@ -39,6 +39,7 @@ const (
 	getRegionStatusByKeyRangeName           = "GetRegionStatusByKeyRange"
 	getStoresName                           = "GetStores"
 	getStoreName                            = "GetStore"
+	deleteStoreName                         = "DeleteStore"
 	setStoreLabelsName                      = "SetStoreLabels"
 	getHealthStatusName                     = "GetHealthStatus"
 	getConfigName                           = "GetConfig"
diff --git a/tests/integrations/client/http_client_test.go b/tests/integrations/client/http_client_test.go
index 9d7e0985940..f4a48dcd63e 100644
--- a/tests/integrations/client/http_client_test.go
+++ b/tests/integrations/client/http_client_test.go
@@ -26,6 +26,7 @@ import (
 	"time"
 
 	"github.com/pingcap/errors"
+	"github.com/pingcap/kvproto/pkg/metapb"
 	"github.com/prometheus/client_golang/prometheus"
 	dto "github.com/prometheus/client_model/go"
 	"github.com/stretchr/testify/require"
@@ -80,6 +81,15 @@ func (suite *httpClientTestSuite) SetupSuite() {
 	leaderServer := cluster.GetLeaderServer()
 
 	err = leaderServer.BootstrapCluster()
+	// Add 2 more stores to the cluster.
+	for i := 2; i <= 4; i++ {
+		tests.MustPutStore(re, cluster, &metapb.Store{
+			Id:            uint64(i),
+			State:         metapb.StoreState_Up,
+			NodeState:     metapb.NodeState_Serving,
+			LastHeartbeat: time.Now().UnixNano(),
+		})
+	}
 	re.NoError(err)
 	for _, region := range []*core.RegionInfo{
 		core.NewTestRegionInfo(10, 1, []byte("a1"), []byte("a2")),
@@ -165,29 +175,29 @@ func (suite *httpClientTestSuite) TestMeta() {
 	re.Empty(regionStats.StoreLeaderCount)
 	hotReadRegions, err := client.GetHotReadRegions(ctx)
 	re.NoError(err)
-	re.Len(hotReadRegions.AsPeer, 1)
-	re.Len(hotReadRegions.AsLeader, 1)
+	re.Len(hotReadRegions.AsPeer, 4)
+	re.Len(hotReadRegions.AsLeader, 4)
 	hotWriteRegions, err := client.GetHotWriteRegions(ctx)
 	re.NoError(err)
-	re.Len(hotWriteRegions.AsPeer, 1)
-	re.Len(hotWriteRegions.AsLeader, 1)
+	re.Len(hotWriteRegions.AsPeer, 4)
+	re.Len(hotWriteRegions.AsLeader, 4)
 	historyHorRegions, err := client.GetHistoryHotRegions(ctx, &pd.HistoryHotRegionsRequest{
 		StartTime: 0,
 		EndTime:   time.Now().AddDate(0, 0, 1).UnixNano() / int64(time.Millisecond),
 	})
 	re.NoError(err)
 	re.Empty(historyHorRegions.HistoryHotRegion)
-	store, err := client.GetStores(ctx)
+	stores, err := client.GetStores(ctx)
 	re.NoError(err)
-	re.Equal(1, store.Count)
-	re.Len(store.Stores, 1)
-	storeID := uint64(store.Stores[0].Store.ID) // TODO: why type is different?
+	re.Equal(4, stores.Count)
+	re.Len(stores.Stores, 4)
+	storeID := uint64(stores.Stores[0].Store.ID) // TODO: why type is different?
 	store2, err := client.GetStore(ctx, storeID)
 	re.NoError(err)
 	re.EqualValues(storeID, store2.Store.ID)
 	version, err := client.GetClusterVersion(ctx)
 	re.NoError(err)
-	re.Equal("0.0.0", version)
+	re.Equal("1.0.0", version)
 	rgs, _ := client.GetRegionsByKeyRange(ctx, pd.NewKeyRange([]byte("a"), []byte("a1")), 100)
 	re.Equal(int64(0), rgs.Count)
 	rgs, _ = client.GetRegionsByKeyRange(ctx, pd.NewKeyRange([]byte("a1"), []byte("a3")), 100)
@@ -196,6 +206,12 @@ func (suite *httpClientTestSuite) TestMeta() {
 	re.Equal(int64(1), rgs.Count)
 	rgs, _ = client.GetRegionsByKeyRange(ctx, pd.NewKeyRange([]byte(""), []byte("")), 100)
 	re.Equal(int64(2), rgs.Count)
+	// store 2 origin status:offline
+	err = client.DeleteStore(ctx, 2)
+	re.NoError(err)
+	store2, err = client.GetStore(ctx, 2)
+	re.NoError(err)
+	re.Equal(int64(metapb.StoreState_Offline), store2.Store.State)
 }
 
 func (suite *httpClientTestSuite) TestGetMinResolvedTSByStoresIDs() {
diff --git a/tools/pd-simulator/main.go b/tools/pd-simulator/main.go
index 45b3ecd75c9..e3dc43ca122 100644
--- a/tools/pd-simulator/main.go
+++ b/tools/pd-simulator/main.go
@@ -25,6 +25,7 @@ import (
 	"github.com/BurntSushi/toml"
 	"github.com/pingcap/log"
 	flag "github.com/spf13/pflag"
+	pdHttp "github.com/tikv/pd/client/http"
 	"github.com/tikv/pd/pkg/schedule/schedulers"
 	"github.com/tikv/pd/pkg/statistics"
 	"github.com/tikv/pd/pkg/utils/logutil"
@@ -92,6 +93,7 @@ func main() {
 
 func run(simCase string, simConfig *sc.SimConfig) {
 	if *pdAddr != "" {
+		simulator.PDHTTPClient = pdHttp.NewClient("pd-simulator", []string{*pdAddr})
 		simStart(*pdAddr, *statusAddress, simCase, simConfig)
 	} else {
 		local, clean := NewSingleServer(context.Background(), simConfig)
@@ -105,6 +107,7 @@ func run(simCase string, simConfig *sc.SimConfig) {
 			}
 			time.Sleep(100 * time.Millisecond)
 		}
+		simulator.PDHTTPClient = pdHttp.NewClient("pd-simulator", []string{local.GetAddr()})
 		simStart(local.GetAddr(), "", simCase, simConfig, clean)
 	}
 }
@@ -183,6 +186,9 @@ EXIT:
 		analysis.GetTransferCounter().PrintResult()
 	}
 
+	if simulator.PDHTTPClient != nil {
+		simulator.PDHTTPClient.Close()
+	}
 	if simResult != "OK" {
 		os.Exit(1)
 	}
diff --git a/tools/pd-simulator/simulator/cases/cases.go b/tools/pd-simulator/simulator/cases/cases.go
index 00b5404669f..c4e2f999978 100644
--- a/tools/pd-simulator/simulator/cases/cases.go
+++ b/tools/pd-simulator/simulator/cases/cases.go
@@ -16,8 +16,8 @@ package cases
 
 import (
 	"github.com/pingcap/kvproto/pkg/metapb"
+	pdHttp "github.com/tikv/pd/client/http"
 	"github.com/tikv/pd/pkg/core"
-	"github.com/tikv/pd/pkg/schedule/placement"
 	"github.com/tikv/pd/pkg/utils/typeutil"
 	"github.com/tikv/pd/tools/pd-simulator/simulator/config"
 	"github.com/tikv/pd/tools/pd-simulator/simulator/info"
@@ -57,7 +57,7 @@ type Case struct {
 	TableNumber     int
 
 	Checker CheckerFunc // To check the schedule is finished.
-	Rules   []*placement.Rule
+	Rules   []*pdHttp.Rule
 	Labels  typeutil.StringSlice
 }
 
diff --git a/tools/pd-simulator/simulator/cases/diagnose_rule.go b/tools/pd-simulator/simulator/cases/diagnose_rule.go
index 5d34e051071..2cd11b9624a 100644
--- a/tools/pd-simulator/simulator/cases/diagnose_rule.go
+++ b/tools/pd-simulator/simulator/cases/diagnose_rule.go
@@ -19,6 +19,7 @@ import (
 
 	"github.com/docker/go-units"
 	"github.com/pingcap/kvproto/pkg/metapb"
+	pdHttp "github.com/tikv/pd/client/http"
 	"github.com/tikv/pd/pkg/core"
 	"github.com/tikv/pd/pkg/schedule/placement"
 	sc "github.com/tikv/pd/tools/pd-simulator/simulator/config"
@@ -30,15 +31,15 @@ import (
 func newRule1(_ *sc.SimConfig) *Case {
 	var simCase Case
 
-	simCase.Rules = make([]*placement.Rule, 0)
-	simCase.Rules = append(simCase.Rules, &placement.Rule{
+	simCase.Rules = make([]*pdHttp.Rule, 0)
+	simCase.Rules = append(simCase.Rules, &pdHttp.Rule{
 		GroupID:     "test1",
 		ID:          "test1",
 		StartKeyHex: "",
 		EndKeyHex:   "",
-		Role:        placement.Learner,
+		Role:        pdHttp.Learner,
 		Count:       1,
-		LabelConstraints: []placement.LabelConstraint{
+		LabelConstraints: []pdHttp.LabelConstraint{
 			{
 				Key:    "region",
 				Op:     "in",
@@ -46,14 +47,14 @@ func newRule1(_ *sc.SimConfig) *Case {
 			},
 		},
 		LocationLabels: []string{"host"},
-	}, &placement.Rule{
+	}, &pdHttp.Rule{
 		GroupID:     placement.DefaultGroupID,
 		ID:          placement.DefaultRuleID,
 		StartKeyHex: "",
 		EndKeyHex:   "",
-		Role:        placement.Voter,
+		Role:        pdHttp.Voter,
 		Count:       5,
-		LabelConstraints: []placement.LabelConstraint{
+		LabelConstraints: []pdHttp.LabelConstraint{
 			{
 				Key:    "region",
 				Op:     "in",
@@ -130,16 +131,16 @@ func newRule1(_ *sc.SimConfig) *Case {
 func newRule2(_ *sc.SimConfig) *Case {
 	var simCase Case
 
-	simCase.Rules = make([]*placement.Rule, 0)
+	simCase.Rules = make([]*pdHttp.Rule, 0)
 	simCase.Rules = append(simCase.Rules,
-		&placement.Rule{
+		&pdHttp.Rule{
 			GroupID:     "test1",
 			ID:          "test1",
 			StartKeyHex: "",
 			EndKeyHex:   "",
-			Role:        placement.Leader,
+			Role:        pdHttp.Leader,
 			Count:       1,
-			LabelConstraints: []placement.LabelConstraint{
+			LabelConstraints: []pdHttp.LabelConstraint{
 				{
 					Key:    "region",
 					Op:     "in",
diff --git a/tools/pd-simulator/simulator/client.go b/tools/pd-simulator/simulator/client.go
index 50ed57995df..113eadab5e0 100644
--- a/tools/pd-simulator/simulator/client.go
+++ b/tools/pd-simulator/simulator/client.go
@@ -15,11 +15,7 @@
 package simulator
 
 import (
-	"bytes"
 	"context"
-	"encoding/json"
-	"fmt"
-	"net/http"
 	"strings"
 	"sync"
 	"time"
@@ -27,8 +23,8 @@ import (
 	"github.com/pingcap/errors"
 	"github.com/pingcap/kvproto/pkg/metapb"
 	"github.com/pingcap/kvproto/pkg/pdpb"
+	pdHttp "github.com/tikv/pd/client/http"
 	"github.com/tikv/pd/pkg/core"
-	"github.com/tikv/pd/pkg/schedule/placement"
 	"github.com/tikv/pd/pkg/utils/typeutil"
 	sc "github.com/tikv/pd/tools/pd-simulator/simulator/config"
 	"github.com/tikv/pd/tools/pd-simulator/simulator/simutil"
@@ -54,12 +50,12 @@ type Client interface {
 const (
 	pdTimeout             = time.Second
 	maxInitClusterRetries = 100
-	httpPrefix            = "pd/api/v1"
 )
 
 var (
 	// errFailInitClusterID is returned when failed to load clusterID from all supplied PD addresses.
 	errFailInitClusterID = errors.New("[pd] failed to get cluster id")
+	PDHTTPClient         pdHttp.Client
 )
 
 type client struct {
@@ -67,7 +63,6 @@ type client struct {
 	tag        string
 	clusterID  uint64
 	clientConn *grpc.ClientConn
-	httpClient *http.Client
 
 	reportRegionHeartbeatCh  chan *core.RegionInfo
 	receiveRegionHeartbeatCh chan *pdpb.RegionHeartbeatResponse
@@ -88,7 +83,6 @@ func NewClient(pdAddr string, tag string) (Client, <-chan *pdpb.RegionHeartbeatR
 		ctx:                      ctx,
 		cancel:                   cancel,
 		tag:                      tag,
-		httpClient:               &http.Client{},
 	}
 	cc, err := c.createConn()
 	if err != nil {
@@ -319,46 +313,27 @@ func (c *client) PutStore(ctx context.Context, store *metapb.Store) error {
 
 func (c *client) PutPDConfig(config *sc.PDConfig) error {
 	if len(config.PlacementRules) > 0 {
-		path := fmt.Sprintf("%s/%s/config/rules/batch", c.url, httpPrefix)
-		ruleOps := make([]*placement.RuleOp, 0)
+		ruleOps := make([]*pdHttp.RuleOp, 0)
 		for _, rule := range config.PlacementRules {
-			ruleOps = append(ruleOps, &placement.RuleOp{
+			ruleOps = append(ruleOps, &pdHttp.RuleOp{
 				Rule:   rule,
-				Action: placement.RuleOpAdd,
+				Action: pdHttp.RuleOpAdd,
 			})
 		}
-		content, _ := json.Marshal(ruleOps)
-		req, err := http.NewRequest(http.MethodPost, path, bytes.NewBuffer(content))
-		req.Header.Add("Content-Type", "application/json")
+		err := PDHTTPClient.SetPlacementRuleInBatch(c.ctx, ruleOps)
 		if err != nil {
 			return err
 		}
-		res, err := c.httpClient.Do(req)
-		if err != nil {
-			return err
-		}
-		defer res.Body.Close()
-		simutil.Logger.Info("add placement rule success", zap.String("rules", string(content)))
+		simutil.Logger.Info("add placement rule success", zap.Any("rules", config.PlacementRules))
 	}
 	if len(config.LocationLabels) > 0 {
-		path := fmt.Sprintf("%s/%s/config", c.url, httpPrefix)
 		data := make(map[string]any)
 		data["location-labels"] = config.LocationLabels
-		content, err := json.Marshal(data)
-		if err != nil {
-			return err
-		}
-		req, err := http.NewRequest(http.MethodPost, path, bytes.NewBuffer(content))
-		req.Header.Add("Content-Type", "application/json")
-		if err != nil {
-			return err
-		}
-		res, err := c.httpClient.Do(req)
+		err := PDHTTPClient.SetConfig(c.ctx, data)
 		if err != nil {
 			return err
 		}
-		defer res.Body.Close()
-		simutil.Logger.Info("add location labels success", zap.String("labels", string(content)))
+		simutil.Logger.Info("add location labels success", zap.Any("labels", config.LocationLabels))
 	}
 	return nil
 }
diff --git a/tools/pd-simulator/simulator/config/config.go b/tools/pd-simulator/simulator/config/config.go
index 01bf8199ab4..6598cf35c0f 100644
--- a/tools/pd-simulator/simulator/config/config.go
+++ b/tools/pd-simulator/simulator/config/config.go
@@ -21,8 +21,8 @@ import (
 
 	"github.com/BurntSushi/toml"
 	"github.com/docker/go-units"
+	pdHttp "github.com/tikv/pd/client/http"
 	sc "github.com/tikv/pd/pkg/schedule/config"
-	"github.com/tikv/pd/pkg/schedule/placement"
 	"github.com/tikv/pd/pkg/utils/configutil"
 	"github.com/tikv/pd/pkg/utils/tempurl"
 	"github.com/tikv/pd/pkg/utils/typeutil"
@@ -133,6 +133,6 @@ func (sc *SimConfig) Speed() uint64 {
 
 // PDConfig saves some config which may be changed in PD.
 type PDConfig struct {
-	PlacementRules []*placement.Rule
+	PlacementRules []*pdHttp.Rule
 	LocationLabels typeutil.StringSlice
 }
diff --git a/tools/pd-simulator/simulator/event.go b/tools/pd-simulator/simulator/event.go
index 8be8f89d759..20c75b58384 100644
--- a/tools/pd-simulator/simulator/event.go
+++ b/tools/pd-simulator/simulator/event.go
@@ -216,6 +216,12 @@ func (*DownNode) Run(raft *RaftEngine, _ int64) bool {
 		return false
 	}
 	delete(raft.conn.Nodes, node.Id)
+	// delete store
+	err := PDHTTPClient.DeleteStore(context.Background(), node.Id)
+	if err != nil {
+		simutil.Logger.Error("put store failed", zap.Uint64("node-id", node.Id), zap.Error(err))
+		return false
+	}
 	node.Stop()
 
 	regions := raft.GetRegions()
diff --git a/tools/pd-simulator/simulator/node.go b/tools/pd-simulator/simulator/node.go
index 883b5d4474b..c51cdfd8a38 100644
--- a/tools/pd-simulator/simulator/node.go
+++ b/tools/pd-simulator/simulator/node.go
@@ -72,6 +72,7 @@ func NewNode(s *cases.Store, pdAddr string, config *sc.SimConfig) (*Node, error)
 			StoreId:   s.ID,
 			Capacity:  uint64(config.RaftStore.Capacity),
 			StartTime: uint32(time.Now().Unix()),
+			Available: uint64(config.RaftStore.Capacity),
 		},
 	}
 	tag := fmt.Sprintf("store %d", s.ID)