diff --git a/app.go b/app.go
new file mode 100644
index 0000000..2b0b0e0
--- /dev/null
+++ b/app.go
@@ -0,0 +1,207 @@
+package main
+
+import (
+	"context"
+	"crypto/ecdsa"
+	"errors"
+	"time"
+
+	"github.com/fasthttp/router"
+
+	"google.golang.org/grpc/grpclog"
+
+	"github.com/nspcc-dev/neofs-api-go/service"
+	"github.com/nspcc-dev/neofs-api-go/state"
+	"github.com/spf13/viper"
+	"github.com/valyala/fasthttp"
+	"go.uber.org/zap"
+)
+
+type (
+	app struct {
+		pool *Pool
+		log  *zap.Logger
+		cfg  *viper.Viper
+		key  *ecdsa.PrivateKey
+
+		wlog logger
+		web  *fasthttp.Server
+
+		jobDone chan struct{}
+		webDone chan struct{}
+
+		rebalanceTimer time.Duration
+
+		nodes []string
+
+		reqHealth *state.HealthRequest
+		reqNetmap *state.NetmapRequest
+
+		conTimeout time.Duration
+		reqTimeout time.Duration
+	}
+
+	App interface {
+		Wait()
+		Worker(context.Context)
+		Serve(context.Context)
+	}
+
+	Option func(a *app)
+)
+
+func WithLogger(l *zap.Logger) Option {
+	return func(a *app) {
+		if l == nil {
+			return
+		}
+		a.log = l
+	}
+}
+
+func WithConfig(c *viper.Viper) Option {
+	return func(a *app) {
+		if c == nil {
+			return
+		}
+		a.cfg = c
+	}
+}
+
+func newApp(opt ...Option) App {
+	a := &app{
+		log: zap.L(),
+		cfg: viper.GetViper(),
+		web: new(fasthttp.Server),
+
+		jobDone: make(chan struct{}),
+		webDone: make(chan struct{}),
+	}
+
+	for i := range opt {
+		opt[i](a)
+	}
+
+	a.wlog = gRPCLogger(a.log)
+
+	if a.cfg.GetBool("verbose") {
+		grpclog.SetLoggerV2(a.wlog)
+	}
+
+	a.key = fetchKey(a.log, a.cfg)
+	a.rebalanceTimer = a.cfg.GetDuration("rebalance_timer")
+	a.conTimeout = a.cfg.GetDuration("connect_timeout")
+	a.reqTimeout = a.cfg.GetDuration("request_timeout")
+
+	// -- setup FastHTTP server: --
+	a.web.Name = "neofs-http-gate"
+	a.web.ReadBufferSize = a.cfg.GetInt("web.read_buffer_size")
+	a.web.WriteBufferSize = a.cfg.GetInt("web.write_buffer_size")
+	a.web.ReadTimeout = a.cfg.GetDuration("web.read_timeout")
+	a.web.WriteTimeout = a.cfg.GetDuration("web.write_timeout")
+	a.web.GetOnly = true
+	a.web.DisableHeaderNamesNormalizing = true
+	a.web.NoDefaultServerHeader = true
+	a.web.NoDefaultContentType = true
+	// -- -- -- -- -- -- -- -- -- --
+
+	a.reqHealth = new(state.HealthRequest)
+	a.reqHealth.SetTTL(service.NonForwardingTTL)
+
+	if err := service.SignRequestHeader(a.key, a.reqHealth); err != nil {
+		a.log.Fatal("could not sign `HealthRequest`", zap.Error(err))
+	}
+
+	a.reqNetmap = new(state.NetmapRequest)
+	a.reqNetmap.SetTTL(service.SingleForwardingTTL)
+
+	if err := service.SignRequestHeader(a.key, a.reqNetmap); err != nil {
+		a.log.Fatal("could not sign `NetmapRequest`", zap.Error(err))
+	}
+
+	a.pool = newPool(a.log, a.cfg)
+
+	return a
+}
+
+func (a *app) Wait() {
+	a.log.Info("application started")
+
+	select {
+	case <-a.jobDone: // wait for job is stopped
+		<-a.webDone
+	case <-a.webDone: // wait for web-server is stopped
+		<-a.jobDone
+	}
+}
+
+func (a *app) Worker(ctx context.Context) {
+	dur := a.rebalanceTimer
+	tick := time.NewTimer(dur)
+
+	a.pool.reBalance(ctx)
+
+	switch _, err := a.pool.getConnection(ctx); {
+	case err == nil:
+		// ignore
+	case errors.Is(err, context.Canceled):
+		// ignore
+		// l.Info("context canceled")
+	default:
+		a.log.Fatal("could get connection", zap.Error(err))
+	}
+
+loop:
+	for {
+		select {
+		case <-ctx.Done():
+			break loop
+		case <-tick.C:
+			a.pool.reBalance(ctx)
+			tick.Reset(dur)
+		}
+	}
+
+	a.pool.close()
+	tick.Stop()
+
+	a.log.Info("connection worker stopped")
+
+	close(a.jobDone)
+}
+
+func (a *app) Serve(ctx context.Context) {
+	go func() {
+		<-ctx.Done()
+		a.log.Info("stop web-server", zap.Error(a.web.Shutdown()))
+		close(a.webDone)
+	}()
+
+	r := router.New()
+	r.RedirectTrailingSlash = true
+	r.GET("/get/:cid/:oid/", a.receiveFile)
+
+	// attaching /-/(ready,healthy)
+	attachHealthy(r, a.pool.unhealthy)
+
+	// enable metrics
+	if a.cfg.GetBool("metrics") {
+		a.log.Info("enabled /metrics")
+		attachMetrics(r, a.wlog)
+	}
+
+	// enable pprof
+	if a.cfg.GetBool("pprof") {
+		a.log.Info("enabled /debug/pprof")
+		attachProfiler(r)
+	}
+
+	bind := a.cfg.GetString("listen_address")
+	a.log.Info("run gateway server",
+		zap.String("address", bind))
+
+	a.web.Handler = r.Handler
+	if err := a.web.ListenAndServe(bind); err != nil {
+		a.log.Fatal("could not start server", zap.Error(err))
+	}
+}
diff --git a/go.mod b/go.mod
index cd245b7..3a214b6 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.13
 
 require (
 	github.com/fasthttp/router v0.6.1
-	github.com/nspcc-dev/neofs-api v0.4.1
+	github.com/nspcc-dev/neofs-api-go v0.5.0
 	github.com/nspcc-dev/neofs-crypto v0.3.0
 	github.com/prometheus/client_golang v1.5.0
 	github.com/prometheus/common v0.9.1
diff --git a/go.sum b/go.sum
index b18ac63..bd7466b 100644
--- a/go.sum
+++ b/go.sum
@@ -116,8 +116,8 @@ github.com/mr-tron/base58 v1.1.3/go.mod h1:BinMc/sQntlIE1frQmRFPUoPA1Zkr8VRgBdjW
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/nspcc-dev/hrw v1.0.8 h1:vwRuJXZXgkMvf473vFzeWGCfY1WBVeSHAEHvR4u3/Cg=
 github.com/nspcc-dev/hrw v1.0.8/go.mod h1:l/W2vx83vMQo6aStyx2AuZrJ+07lGv2JQGlVkPG06MU=
-github.com/nspcc-dev/neofs-api v0.4.1 h1:Kcr9mVmtCQPoPeHIL5z6dvE8P0zsispP2c2z6HA5bLM=
-github.com/nspcc-dev/neofs-api v0.4.1/go.mod h1:kkoWJ6YnTRwRHI+h2kXbx21i/sZZs0LheF+T/33xzr4=
+github.com/nspcc-dev/neofs-api-go v0.5.0 h1:YGX2lEjFmiFYmk8gCkLINJjSh6hToKp2oo0sG5u8G+4=
+github.com/nspcc-dev/neofs-api-go v0.5.0/go.mod h1:RlP++uLPHmXN81KWmdgBujo6FEeTn/b3aoQjHgKuNd4=
 github.com/nspcc-dev/neofs-crypto v0.3.0 h1:zlr3pgoxuzrmGCxc5W8dGVfA9Rro8diFvVnBg0L4ifM=
 github.com/nspcc-dev/neofs-crypto v0.3.0/go.mod h1:8w16GEJbH6791ktVqHN9YRNH3s9BEEKYxGhlFnp0cDw=
 github.com/nspcc-dev/netmap v1.6.1 h1:Pigqpqi6QSdRiusbq5XlO20A18k6Eyu7j9MzOfAE3CM=
diff --git a/health.go b/health.go
index 708bbb7..3141a0f 100644
--- a/health.go
+++ b/health.go
@@ -12,12 +12,12 @@ const (
 )
 
 func attachHealthy(r *router.Router, e *atomic.Error) {
-	r.GET("/-/ready", func(ctx *fasthttp.RequestCtx) {
+	r.GET("/-/ready/", func(ctx *fasthttp.RequestCtx) {
 		ctx.SetStatusCode(fasthttp.StatusOK)
 		ctx.SetBodyString(healthyState + "ready")
 	})
 
-	r.GET("/-/healthy", func(c *fasthttp.RequestCtx) {
+	r.GET("/-/healthy/", func(c *fasthttp.RequestCtx) {
 		code := fasthttp.StatusOK
 		msg := "healthy"
 
diff --git a/main.go b/main.go
index 8a66199..1d9c832 100644
--- a/main.go
+++ b/main.go
@@ -1,122 +1,18 @@
 package main
 
-import (
-	"context"
-	"crypto/ecdsa"
-	"errors"
-	"time"
-
-	"github.com/fasthttp/router"
-	"github.com/valyala/fasthttp"
-	"go.uber.org/zap"
-	"google.golang.org/grpc/grpclog"
-)
-
-type app struct {
-	pool    *Pool
-	log     *zap.Logger
-	timeout time.Duration
-	key     *ecdsa.PrivateKey
-}
-
 func main() {
 	var (
-		err error
-
 		v = settings()
 		l = newLogger(v)
-		z = gRPCLogger(l)
 		g = newGracefulContext(l)
-		d = v.GetDuration("rebalance_timer")
+
+		a = newApp(
+			WithLogger(l),
+			WithConfig(v))
 	)
 
-	if v.GetBool("verbose") {
-		grpclog.SetLoggerV2(z)
-	}
+	go a.Serve(g)
+	go a.Worker(g)
 
-	a := &app{
-		log:     l,
-		pool:    newPool(l, v),
-		key:     fetchKey(l, v),
-		timeout: v.GetDuration("request_timeout"),
-	}
-
-	r := router.New()
-	r.RedirectTrailingSlash = true
-	r.GET("/get/:cid/:oid", a.receiveFile)
-
-	// attaching /-/(ready,healthy)
-	attachHealthy(r, a.pool.unhealthy)
-
-	// enable metrics
-	if v.GetBool("metrics") {
-		l.Info("enabled /metrics")
-		attachMetrics(r, z)
-	}
-
-	// enable pprof
-	if v.GetBool("pprof") {
-		l.Info("enabled /debug/pprof")
-		attachProfiler(r)
-	}
-
-	en := &fasthttp.Server{
-		Name:                          "neofs-http-gate",
-		Handler:                       r.Handler,
-		ReadBufferSize:                4096,
-		ReadTimeout:                   time.Second * 15,
-		GetOnly:                       true,
-		DisableHeaderNamesNormalizing: true,
-		NoDefaultServerHeader:         true,
-		NoDefaultContentType:          true,
-	}
-
-	go func() {
-		bind := v.GetString("listen_address")
-		l.Info("run gateway server",
-			zap.String("address", bind))
-
-		if err := en.ListenAndServe(bind); err != nil {
-			l.Panic("could not start server", zap.Error(err))
-		}
-	}()
-
-	go checkConnection(g, d, a.pool)
-
-	a.pool.reBalance(g)
-
-	switch _, err = a.pool.getConnection(g); {
-	case err == nil:
-		// ignore
-	case errors.Is(err, context.Canceled):
-		// ignore
-		// l.Info("context canceled")
-	default:
-		l.Error("could get connection", zap.Error(err))
-		return
-	}
-
-	<-g.Done()
-
-	l.Info("web server stopped", zap.Error(en.Shutdown()))
-}
-
-func checkConnection(ctx context.Context, dur time.Duration, p *Pool) {
-	tick := time.NewTimer(dur)
-
-loop:
-	for {
-		select {
-		case <-ctx.Done():
-			break loop
-		case <-tick.C:
-			p.reBalance(ctx)
-			tick.Reset(dur)
-		}
-	}
-
-	p.close()
-	tick.Stop()
-
-	p.log.Info("connection worker stopped")
+	a.Wait()
 }
diff --git a/pool.go b/pool.go
index 7baa273..15f9f47 100644
--- a/pool.go
+++ b/pool.go
@@ -11,8 +11,8 @@ import (
 	"sync"
 	"time"
 
-	"github.com/nspcc-dev/neofs-api/service"
-	"github.com/nspcc-dev/neofs-api/state"
+	"github.com/nspcc-dev/neofs-api-go/service"
+	"github.com/nspcc-dev/neofs-api-go/state"
 	"github.com/spf13/viper"
 	"go.uber.org/atomic"
 	"go.uber.org/zap"
@@ -149,6 +149,29 @@ func (p *Pool) close() {
 	}
 }
 
+func (a *app) checkHealth(ctx context.Context, conn *grpc.ClientConn) error {
+	//a.log.Info("try to fetch node health status",
+	//	zap.String("node", conn.Target()),
+	//	zap.Stringer("timeout", a.reqTimeout))
+
+	ctx, cancel := context.WithTimeout(ctx, a.reqTimeout)
+	result, err := state.NewStatusClient(conn).HealthCheck(ctx, a.reqHealth)
+	cancel()
+
+	if err != nil {
+		result = &state.HealthResponse{Status: err.Error()}
+	} else if !result.Healthy {
+		err = errors.New(result.Status)
+	}
+
+	a.log.Debug("received node health status",
+		zap.String("node", conn.Target()),
+		zap.String("status", result.Status),
+		zap.Error(err))
+
+	return err
+}
+
 func (p *Pool) reBalance(ctx context.Context) {
 	p.Lock()
 	defer func() {
diff --git a/pprof.go b/pprof.go
index ef5457a..7400ea5 100644
--- a/pprof.go
+++ b/pprof.go
@@ -11,7 +11,7 @@ import (
 
 func attachProfiler(r *router.Router) {
 	r.GET("/debug/pprof/", pprofHandler())
-	r.GET("/debug/pprof/:name", pprofHandler())
+	r.GET("/debug/pprof/:name/", pprofHandler())
 }
 
 func pprofHandler() fasthttp.RequestHandler {
diff --git a/receive.go b/receive.go
index a3d001b..de2d148 100644
--- a/receive.go
+++ b/receive.go
@@ -9,10 +9,10 @@ import (
 	"strings"
 	"time"
 
-	"github.com/nspcc-dev/neofs-api/container"
-	"github.com/nspcc-dev/neofs-api/object"
-	"github.com/nspcc-dev/neofs-api/refs"
-	"github.com/nspcc-dev/neofs-api/service"
+	"github.com/nspcc-dev/neofs-api-go/container"
+	"github.com/nspcc-dev/neofs-api-go/object"
+	"github.com/nspcc-dev/neofs-api-go/refs"
+	"github.com/nspcc-dev/neofs-api-go/service"
 	"github.com/valyala/fasthttp"
 	"go.uber.org/zap"
 	"google.golang.org/grpc"
@@ -49,7 +49,7 @@ func (a *app) receiveFile(c *fasthttp.RequestCtx) {
 	}
 
 	{ // try to connect or throw http error:
-		ctx, cancel := context.WithTimeout(c, a.timeout)
+		ctx, cancel := context.WithTimeout(c, a.reqTimeout)
 		defer cancel()
 
 		if con, err = a.pool.getConnection(ctx); err != nil {
@@ -59,7 +59,7 @@ func (a *app) receiveFile(c *fasthttp.RequestCtx) {
 		}
 	}
 
-	ctx, cancel := context.WithTimeout(c, a.timeout)
+	ctx, cancel := context.WithTimeout(c, a.reqTimeout)
 	defer cancel()
 
 	log = log.With(zap.String("node", con.Target()))
diff --git a/settings.go b/settings.go
index f21bfd9..02cba71 100644
--- a/settings.go
+++ b/settings.go
@@ -11,7 +11,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/nspcc-dev/neofs-api/refs"
+	"github.com/nspcc-dev/neofs-api-go/refs"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/spf13/pflag"
 	"github.com/spf13/viper"