diff --git a/client/client.go b/client/client.go
index c65bae4..5c221d3 100644
--- a/client/client.go
+++ b/client/client.go
@@ -4,6 +4,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/irisnet/core-sdk-go/client"
 	sdk "github.com/irisnet/core-sdk-go/types"
+	"github.com/irisnet/irismod-sdk-go/mt"
 	"github.com/irisnet/irismod-sdk-go/nft"
 	"github.com/tendermint/tendermint/libs/log"
 )
@@ -14,6 +15,7 @@ type Client struct {
 	sdk.BaseClient
 
 	NFTClient nft.IClient
+	MTClient  mt.IClient
 }
 
 func NewClient(cfg sdk.ClientConfig) (Client, error) {
@@ -28,13 +30,19 @@ func NewClient(cfg sdk.ClientConfig) (Client, error) {
 		return Client{}, err
 	}
 
+	mtClient, err := mt.NewClient(baseClient)
+	if err != nil {
+		return Client{}, err
+	}
+
 	cli := Client{
 		BaseClient:     baseClient,
 		moduleManager:  make(map[string]sdk.Module),
 		encodingConfig: encodingConfig,
 		NFTClient:      nftClient,
+		MTClient:       mtClient,
 	}
-	cli.RegisterModule(nftClient)
+	cli.RegisterModule(nftClient, mtClient)
 	return cli, nil
 }
 
diff --git a/integration_test/mt_test.go b/integration_test/mt_test.go
new file mode 100644
index 0000000..c82eb26
--- /dev/null
+++ b/integration_test/mt_test.go
@@ -0,0 +1,37 @@
+package integration_test
+
+func (s *ClientTestSuite) TestMtABCIQueryClass() {
+	classId := "c02a799c8fee067a7f9b944554d8431ee539847234441833e45a3a2d3123fd99"
+	height := int64(15530227)
+
+	resp, err := s.MTClient.ABCIQueryClass(classId, height)
+	s.Require().NoError(err)
+	s.T().Log(resp)
+}
+
+func (s *ClientTestSuite) TestMtABCIQueryClass2() {
+	classId := "c02a799c8fee067a7f9b944554d8431ee539847234441833e45a3a2d3123fd99"
+	height := int64(20000000)
+
+	resp, err := s.MTClient.ABCIQueryClass2(classId, height)
+	s.Require().NoError(err)
+	s.T().Log(resp)
+}
+
+func (s *ClientTestSuite) TestMtIQueryClass() {
+	classId := "c02a799c8fee067a7f9b944554d8431ee539847234441833e45a3a2d3123fd99"
+
+	resp, err := s.MTClient.QueryClass(classId)
+	s.Require().NoError(err)
+	s.T().Log(resp)
+}
+
+func (s *ClientTestSuite) TestMtABCIQueryMT() {
+	classId := "c02a799c8fee067a7f9b944554d8431ee539847234441833e45a3a2d3123fd99"
+	tokenId := "ff6e57b41cb52ae7d58d854b2123da2c5657fd15d525821a13fe7da1b9cebd80"
+	height := int64(26606801)
+
+	resp, err := s.MTClient.ABCIQueryMT(classId, tokenId, height)
+	s.Require().NoError(err)
+	s.T().Log(resp)
+}
diff --git a/integration_test/nft_test.go b/integration_test/nft_test.go
index 8a1012b..39269df 100644
--- a/integration_test/nft_test.go
+++ b/integration_test/nft_test.go
@@ -42,3 +42,12 @@ func (s *ClientTestSuite) TestNFT() {
 	s.Require().NoError(err)
 	s.T().Log(resp)
 }
+
+func (s *ClientTestSuite) TestNftABCIQueryClass() {
+	classId := "testticket"
+	height := int64(2554487)
+
+	resp, err := s.NFTClient.ABCIQueryClass(classId, height)
+	s.Require().NoError(err)
+	s.T().Log(resp)
+}
diff --git a/mt/abci_query.go b/mt/abci_query.go
index abb7afd..8edc525 100644
--- a/mt/abci_query.go
+++ b/mt/abci_query.go
@@ -10,8 +10,9 @@ import (
 )
 
 const (
-	FunctionPathQueryDenom = "/irismod.mt.Query/Denom"
-	FunctionPathQueryMT    = "/irismod.mt.Query/MT"
+	FunctionPathQueryDenom  = "/irismod.mt.Query/Denom"
+	FunctionPathQueryDenoms = "/irismod.mt.Query/Denoms"
+	FunctionPathQueryMT     = "/irismod.mt.Query/MT"
 )
 
 func (cli *Client) ABCIQueryClass(classId string, height int64) (*QueryClassResp, error) {
@@ -63,6 +64,60 @@ func (cli *Client) ABCIQueryClass(classId string, height int64) (*QueryClassResp
 	return &resp, nil
 }
 
+func (cli *Client) ABCIQueryClass2(classId string, height int64) (*QueryClassResp, error) {
+	var resp QueryClassResp
+
+	if len(classId) == 0 {
+		return nil, sdkerrors.Wrapf(ErrInvalidClassId, "class id is required")
+	}
+
+	if height < 0 {
+		return nil, sdkerrors.Wrapf(ErrInvalidHeight, "height must be not less than 0")
+	}
+
+	grpcReq := &QueryDenomsRequest{}
+
+	reqBz, err := cli.Marshaler().Marshal(grpcReq)
+	if err != nil {
+		return nil, err
+	}
+
+	opts := rpcclient.ABCIQueryOptions{
+		Height: height,
+		Prove:  false,
+	}
+
+	result, err := cli.ABCIQueryWithOptions(context.Background(),
+		FunctionPathQueryDenoms, reqBz, opts)
+	if err != nil {
+		return nil, err
+	}
+
+	if !result.Response.IsOK() {
+		return nil, errors.New(fmt.Sprint(result.Response.Log))
+	}
+
+	var grpcResp QueryDenomsResponse
+	err = cli.Marshaler().Unmarshal(result.Response.Value, &grpcResp)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, denom := range grpcResp.Denoms {
+		if denom.Id == classId {
+			resp = QueryClassResp{
+				ID:    denom.Id,
+				Name:  denom.Name,
+				Data:  denom.Data,
+				Owner: denom.Owner,
+			}
+			break
+		}
+	}
+
+	return &resp, nil
+}
+
 func (cli *Client) ABCIQueryMT(classId, tokenId string, height int64) (*QueryMTResp, error) {
 	if len(classId) == 0 {
 		return nil, sdkerrors.Wrapf(ErrInvalidClassId, "class id is required")
diff --git a/mt/client.go b/mt/client.go
index 49d5b72..5259d6d 100644
--- a/mt/client.go
+++ b/mt/client.go
@@ -1,7 +1,7 @@
 package mt
 
 import (
-	context "context"
+	"context"
 
 	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
 	"github.com/cosmos/cosmos-sdk/types"
@@ -165,8 +165,9 @@ func (cli *Client) QuerySupply(denomID, creator string) (uint64, sdk.Error) {
 	if len(denomID) == 0 {
 		return 0, sdk.Wrapf("denomID is required")
 	}
-	if _, err := types.ValAddressFromBech32(creator); err != nil {
-		return 0, sdk.Wrap(err)
+
+	if _, err := types.AccAddressFromBech32(creator); err != nil {
+		return 0, sdk.Wrapf("invalid sender address (%s)", err)
 	}
 
 	res, err := cli.queryCli.Supply(
@@ -320,8 +321,8 @@ func (cli *Client) QueryBalances(denomID, owner string, pagination *query.PageRe
 		return nil, sdk.Wrapf("denomID is required")
 	}
 
-	if _, err := types.ValAddressFromBech32(owner); err != nil {
-		return nil, sdk.Wrap(err)
+	if _, err := types.AccAddressFromBech32(owner); err != nil {
+		return nil, sdk.Wrapf("invalid sender address (%s)", err)
 	}
 
 	res, err := cli.queryCli.Balances(
diff --git a/mt/exported.go b/mt/exported.go
index 61d5390..9620352 100644
--- a/mt/exported.go
+++ b/mt/exported.go
@@ -7,6 +7,7 @@ import (
 
 type IABIClient interface {
 	ABCIQueryClass(classId string, height int64) (*QueryClassResp, error)
+	ABCIQueryClass2(classId string, height int64) (*QueryClassResp, error)
 	ABCIQueryMT(classId, tokenId string, height int64) (*QueryMTResp, error)
 }
 
diff --git a/nft/client.go b/nft/client.go
index cd19c11..1110409 100644
--- a/nft/client.go
+++ b/nft/client.go
@@ -273,7 +273,7 @@ func (cli *Client) QueryCollection(classId string, pagination PaginationRequest)
 		Description:      result.Collection.Denom.Description,
 	}
 	nfts := make([]QueryNFTResp, 0, len(result.Collection.NFTs))
-	for index, value := range result.Collection.NFTs {
+	for _, value := range result.Collection.NFTs {
 		nft := QueryNFTResp{
 			ID:      value.Id,
 			Name:    value.Name,
@@ -282,7 +282,7 @@ func (cli *Client) QueryCollection(classId string, pagination PaginationRequest)
 			URI:     value.URI,
 			URIHash: value.UriHash,
 		}
-		nfts[index] = nft
+		nfts = append(nfts, nft)
 	}
 
 	response := &QueryCollectionResp{