diff --git a/app/consumer-democracy/app.go b/app/consumer-democracy/app.go
index 420490cf5d..120ab9966d 100644
--- a/app/consumer-democracy/app.go
+++ b/app/consumer-democracy/app.go
@@ -15,7 +15,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/baseapp"
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/client/grpc/tmservice"
-	"github.com/cosmos/cosmos-sdk/client/rpc"
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/codec/types"
 	"github.com/cosmos/cosmos-sdk/server/api"
@@ -573,7 +572,6 @@ func New(
 	)
 
 	app.MM.RegisterInvariants(&app.CrisisKeeper)
-	app.MM.RegisterRoutes(app.Router(), app.QueryRouter(), encodingConfig.Amino)
 
 	app.configurator = module.NewConfigurator(app.appCodec, app.MsgServiceRouter(), app.GRPCQueryRouter())
 	app.MM.RegisterServices(app.configurator)
@@ -871,14 +869,12 @@ func (app *App) GetTxConfig() client.TxConfig {
 // API server.
 func (app *App) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APIConfig) {
 	clientCtx := apiSvr.ClientCtx
-	rpc.RegisterRoutes(clientCtx, apiSvr.Router)
 	// Register new tx routes from grpc-gateway.
 	authtx.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 	// Register new tendermint queries routes from grpc-gateway.
 	tmservice.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 
-	// Register legacy and grpc-gateway routes for all modules.
-	ModuleBasics.RegisterRESTRoutes(clientCtx, apiSvr.Router)
+	// Register grpc-gateway routes for all modules.
 	ModuleBasics.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 
 	// register swagger API from root so that other applications can override easily
diff --git a/app/consumer/app.go b/app/consumer/app.go
index 6979caa023..8b82f900fe 100644
--- a/app/consumer/app.go
+++ b/app/consumer/app.go
@@ -17,7 +17,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/baseapp"
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/client/grpc/tmservice"
-	"github.com/cosmos/cosmos-sdk/client/rpc"
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/codec/types"
 	"github.com/cosmos/cosmos-sdk/server/api"
@@ -459,7 +458,6 @@ func New(
 	)
 
 	app.MM.RegisterInvariants(&app.CrisisKeeper)
-	app.MM.RegisterRoutes(app.Router(), app.QueryRouter(), encodingConfig.Amino)
 
 	app.configurator = module.NewConfigurator(app.appCodec, app.MsgServiceRouter(), app.GRPCQueryRouter())
 	app.MM.RegisterServices(app.configurator)
@@ -702,14 +700,12 @@ func (app *App) GetTxConfig() client.TxConfig {
 // API server.
 func (app *App) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APIConfig) {
 	clientCtx := apiSvr.ClientCtx
-	rpc.RegisterRoutes(clientCtx, apiSvr.Router)
 	// Register new tx routes from grpc-gateway.
 	authtx.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 	// Register new tendermint queries routes from grpc-gateway.
 	tmservice.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 
-	// Register legacy and grpc-gateway routes for all modules.
-	ModuleBasics.RegisterRESTRoutes(clientCtx, apiSvr.Router)
+	// Register grpc-gateway routes for all modules.
 	ModuleBasics.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 
 	// register swagger API from root so that other applications can override easily
diff --git a/app/provider/app.go b/app/provider/app.go
index a8cc569348..e50dec23ba 100644
--- a/app/provider/app.go
+++ b/app/provider/app.go
@@ -14,7 +14,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/baseapp"
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/client/grpc/tmservice"
-	"github.com/cosmos/cosmos-sdk/client/rpc"
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/codec/types"
 	"github.com/cosmos/cosmos-sdk/server/api"
@@ -563,7 +562,6 @@ func New(
 	)
 
 	app.MM.RegisterInvariants(&app.CrisisKeeper)
-	app.MM.RegisterRoutes(app.Router(), app.QueryRouter(), encodingConfig.Amino)
 
 	app.configurator = module.NewConfigurator(app.appCodec, app.MsgServiceRouter(), app.GRPCQueryRouter())
 	app.MM.RegisterServices(app.configurator)
@@ -809,14 +807,12 @@ func (app *App) GetTxConfig() client.TxConfig {
 // API server.
 func (app *App) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APIConfig) {
 	clientCtx := apiSvr.ClientCtx
-	rpc.RegisterRoutes(clientCtx, apiSvr.Router)
 	// Register new tx routes from grpc-gateway.
 	authtx.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 	// Register new tendermint queries routes from grpc-gateway.
 	tmservice.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 
-	// Register legacy and grpc-gateway routes for all modules.
-	ModuleBasics.RegisterRESTRoutes(clientCtx, apiSvr.Router)
+	// Register grpc-gateway routes for all modules.
 	ModuleBasics.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 
 	// register swagger API from root so that other applications can override easily
diff --git a/x/ccv/consumer/module.go b/x/ccv/consumer/module.go
index ff22d2378d..c34d3f10e3 100644
--- a/x/ccv/consumer/module.go
+++ b/x/ccv/consumer/module.go
@@ -6,7 +6,6 @@ import (
 	"fmt"
 
 	abci "github.com/cometbft/cometbft/abci/types"
-	"github.com/gorilla/mux"
 	"github.com/grpc-ecosystem/grpc-gateway/runtime"
 	"github.com/spf13/cobra"
 
@@ -64,10 +63,6 @@ func (AppModuleBasic) ValidateGenesis(cdc codec.JSONCodec, config client.TxEncod
 	return data.Validate()
 }
 
-// RegisterRESTRoutes implements AppModuleBasic interface
-func (AppModuleBasic) RegisterRESTRoutes(clientCtx client.Context, rtr *mux.Router) {
-}
-
 // RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the ibc-consumer module.
 func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
 	err := consumertypes.RegisterQueryHandlerClient(context.Background(), mux, consumertypes.NewQueryClient(clientCtx))
diff --git a/x/ccv/provider/module.go b/x/ccv/provider/module.go
index 1e55d99fce..8c390b8460 100644
--- a/x/ccv/provider/module.go
+++ b/x/ccv/provider/module.go
@@ -16,7 +16,6 @@ import (
 	"github.com/cosmos/interchain-security/x/ccv/provider/client/cli"
 	"github.com/cosmos/interchain-security/x/ccv/provider/keeper"
 	providertypes "github.com/cosmos/interchain-security/x/ccv/provider/types"
-	"github.com/gorilla/mux"
 	"github.com/grpc-ecosystem/grpc-gateway/runtime"
 	"github.com/spf13/cobra"
 )
@@ -61,10 +60,6 @@ func (AppModuleBasic) ValidateGenesis(cdc codec.JSONCodec, config client.TxEncod
 	return data.Validate()
 }
 
-// RegisterRESTRoutes implements AppModuleBasic interface
-func (AppModuleBasic) RegisterRESTRoutes(clientCtx client.Context, rtr *mux.Router) {
-}
-
 // RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the ibc-provider module.
 func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
 	err := providertypes.RegisterQueryHandlerClient(context.Background(), mux, providertypes.NewQueryClient(clientCtx))