diff --git a/api/api_types.go b/api/api_types.go
index 6f74d74fe..d49d37a05 100644
--- a/api/api_types.go
+++ b/api/api_types.go
@@ -280,9 +280,9 @@ type TransfersList struct {
 }
 
 type GenericTransactionWithInfo struct {
-	TxContent json.RawMessage          `json:"tx"`
-	TxInfo    indexertypes.Transaction `json:"txInfo"`
-	Signature types.HexBytes           `json:"signature"`
+	TxContent json.RawMessage           `json:"tx"`
+	TxInfo    *indexertypes.Transaction `json:"txInfo"`
+	Signature types.HexBytes            `json:"signature"`
 }
 
 type ChainInfo struct {
@@ -434,4 +434,5 @@ func CensusTypeToOrigin(ctype CensusTypeDescription) (models.CensusOrigin, []byt
 type Block struct {
 	comettypes.Block `json:",inline"`
 	Hash             types.HexBytes `json:"hash" `
+	TxCount          int64          `json:"txCount"`
 }
diff --git a/api/chain.go b/api/chain.go
index e2fbdc17a..90ab5c2ed 100644
--- a/api/chain.go
+++ b/api/chain.go
@@ -13,9 +13,7 @@ import (
 	"go.vocdoni.io/dvote/crypto/zk/circuit"
 	"go.vocdoni.io/dvote/httprouter"
 	"go.vocdoni.io/dvote/httprouter/apirest"
-	"go.vocdoni.io/dvote/types"
 	"go.vocdoni.io/dvote/util"
-	"go.vocdoni.io/dvote/vochain"
 	"go.vocdoni.io/dvote/vochain/genesis"
 	"go.vocdoni.io/dvote/vochain/indexer"
 	"go.vocdoni.io/dvote/vochain/state"
@@ -657,15 +655,7 @@ func (a *API) chainTxHandler(_ *apirest.APIdata, ctx *httprouter.HTTPContext) er
 	if err != nil {
 		return err
 	}
-	stx, err := a.vocapp.GetTx(uint32(height), int32(index))
-	if err != nil {
-		if errors.Is(err, vochain.ErrTransactionNotFound) {
-			return ErrTransactionNotFound
-		}
-		return ErrVochainGetTxFailed.WithErr(err)
-	}
-
-	ref, err := a.indexer.GetTxByBlockHeightAndBlockIndex(height, index)
+	ref, err := a.indexer.GetTransactionByHeightAndIndex(height, index)
 	if err != nil {
 		if errors.Is(err, indexer.ErrTransactionNotFound) {
 			return ErrTransactionNotFound
@@ -673,9 +663,9 @@ func (a *API) chainTxHandler(_ *apirest.APIdata, ctx *httprouter.HTTPContext) er
 		return ErrVochainGetTxFailed.WithErr(err)
 	}
 	tx := &GenericTransactionWithInfo{
-		TxContent: []byte(protoFormat(stx.Tx)),
-		Signature: stx.Signature,
-		TxInfo:    *ref,
+		TxContent: []byte(protoFormat(ref.RawTx)),
+		TxInfo:    ref,
+		Signature: ref.Signature,
 	}
 	data, err := json.Marshal(tx)
 	if err != nil {
@@ -871,18 +861,31 @@ func (a *API) chainBlockHandler(_ *apirest.APIdata, ctx *httprouter.HTTPContext)
 	if err != nil {
 		return err
 	}
-	tmblock := a.vocapp.GetBlockByHeight(int64(height))
-	if tmblock == nil {
-		return ErrBlockNotFound
+	idxblock, err := a.indexer.BlockByHeight(int64(height))
+	if err != nil {
+		if errors.Is(err, indexer.ErrBlockNotFound) {
+			return ErrBlockNotFound
+		}
+		return ErrBlockNotFound.WithErr(err)
+	}
+	txcount, err := a.indexer.CountTransactionsByHeight(int64(height))
+	if err != nil {
+		return ErrIndexerQueryFailed.WithErr(err)
 	}
 	block := &Block{
 		Block: comettypes.Block{
-			Header:     tmblock.Header,
-			Data:       tmblock.Data,
-			Evidence:   tmblock.Evidence,
-			LastCommit: tmblock.LastCommit,
+			Header: comettypes.Header{
+				ChainID:         idxblock.ChainID,
+				Height:          idxblock.Height,
+				Time:            idxblock.Time,
+				ProposerAddress: []byte(idxblock.ProposerAddress),
+				LastBlockID: comettypes.BlockID{
+					Hash: []byte(idxblock.LastBlockHash),
+				},
+			},
 		},
-		Hash: types.HexBytes(tmblock.Hash()),
+		Hash:    idxblock.Hash,
+		TxCount: txcount,
 	}
 	data, err := json.Marshal(block)
 	if err != nil {
@@ -906,18 +909,31 @@ func (a *API) chainBlockByHashHandler(_ *apirest.APIdata, ctx *httprouter.HTTPCo
 	if err != nil {
 		return err
 	}
-	tmblock := a.vocapp.GetBlockByHash(hash)
-	if tmblock == nil {
-		return ErrBlockNotFound
+	idxblock, err := a.indexer.BlockByHash(hash)
+	if err != nil {
+		if errors.Is(err, indexer.ErrBlockNotFound) {
+			return ErrBlockNotFound
+		}
+		return ErrBlockNotFound.WithErr(err)
+	}
+	txcount, err := a.indexer.CountTransactionsByHeight(idxblock.Height)
+	if err != nil {
+		return ErrIndexerQueryFailed.WithErr(err)
 	}
 	block := &Block{
 		Block: comettypes.Block{
-			Header:     tmblock.Header,
-			Data:       tmblock.Data,
-			Evidence:   tmblock.Evidence,
-			LastCommit: tmblock.LastCommit,
+			Header: comettypes.Header{
+				ChainID:         idxblock.ChainID,
+				Height:          idxblock.Height,
+				Time:            idxblock.Time,
+				ProposerAddress: []byte(idxblock.ProposerAddress),
+				LastBlockID: comettypes.BlockID{
+					Hash: []byte(idxblock.LastBlockHash),
+				},
+			},
 		},
-		Hash: types.HexBytes(tmblock.Hash()),
+		Hash:    idxblock.Hash,
+		TxCount: txcount,
 	}
 	data, err := json.Marshal(block)
 	if err != nil {
diff --git a/test/api_test.go b/test/api_test.go
index 80e4f3699..267895636 100644
--- a/test/api_test.go
+++ b/test/api_test.go
@@ -461,6 +461,41 @@ func TestAPIAccountTokentxs(t *testing.T) {
 	qt.Assert(t, gotAcct1.Balance, qt.Equals, initBalance+amountAcc2toAcct1-amountAcc1toAcct2-uint64(txBasePrice))
 }
 
+func TestAPIBlocks(t *testing.T) {
+	server := testcommon.APIserver{}
+	server.Start(t,
+		api.ChainHandler,
+		api.CensusHandler,
+		api.VoteHandler,
+		api.AccountHandler,
+		api.ElectionHandler,
+		api.WalletHandler,
+	)
+	token1 := uuid.New()
+	c := testutil.NewTestHTTPclient(t, server.ListenAddr, &token1)
+
+	// Block 1
+	server.VochainAPP.AdvanceTestBlock()
+	waitUntilHeight(t, c, 1)
+
+	// create a new account
+	initBalance := uint64(80)
+	_ = createAccount(t, c, server, initBalance)
+
+	// Block 2
+	server.VochainAPP.AdvanceTestBlock()
+	waitUntilHeight(t, c, 2)
+
+	// check the txCount
+	resp, code := c.Request("GET", nil, "chain", "blocks", "1")
+	qt.Assert(t, code, qt.Equals, 200, qt.Commentf("response: %s", resp))
+
+	block := api.Block{}
+	err := json.Unmarshal(resp, &block)
+	qt.Assert(t, err, qt.IsNil)
+	qt.Assert(t, block.TxCount, qt.Equals, int64(1))
+}
+
 func runAPIElectionCostWithParams(t *testing.T,
 	electionParams electionprice.ElectionParameters,
 	startBlock uint32, initialBalance,