diff --git a/cmd/neofs-node/container.go b/cmd/neofs-node/container.go
index 5d217f3c..82fb6763 100644
--- a/cmd/neofs-node/container.go
+++ b/cmd/neofs-node/container.go
@@ -217,24 +217,27 @@ func (r *remoteLoadAnnounceProvider) InitRemote(srv loadroute.ServerInfo) (loadc
 		return nil, errors.Wrap(err, "could not convert address to IP format")
 	}
 
-	c, err := r.clientCache.Get(r.key, ipAddr)
+	c, err := r.clientCache.Get(ipAddr)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not initialize API client")
 	}
 
 	return &remoteLoadAnnounceWriterProvider{
 		client: c,
+		key:    r.key,
 	}, nil
 }
 
 type remoteLoadAnnounceWriterProvider struct {
 	client *apiClient.Client
+	key    *ecdsa.PrivateKey
 }
 
 func (p *remoteLoadAnnounceWriterProvider) InitWriter(ctx context.Context) (loadcontroller.Writer, error) {
 	return &remoteLoadAnnounceWriter{
 		ctx:    ctx,
 		client: p.client,
+		key:    p.key,
 	}, nil
 }
 
@@ -242,6 +245,7 @@ type remoteLoadAnnounceWriter struct {
 	ctx context.Context
 
 	client *apiClient.Client
+	key    *ecdsa.PrivateKey
 
 	buf []containerSDK.UsedSpaceAnnouncement
 }
@@ -253,7 +257,7 @@ func (r *remoteLoadAnnounceWriter) Put(a containerSDK.UsedSpaceAnnouncement) err
 }
 
 func (r *remoteLoadAnnounceWriter) Close() error {
-	return r.client.AnnounceContainerUsedSpace(r.ctx, r.buf)
+	return r.client.AnnounceContainerUsedSpace(r.ctx, r.buf, apiClient.WithKey(r.key))
 }
 
 type loadPlacementBuilder struct {
diff --git a/go.mod b/go.mod
index 2ea9ff42..e434dda0 100644
--- a/go.mod
+++ b/go.mod
@@ -16,7 +16,7 @@ require (
 	github.com/multiformats/go-multihash v0.0.13 // indirect
 	github.com/nspcc-dev/hrw v1.0.9
 	github.com/nspcc-dev/neo-go v0.94.0-pre.0.20210301112733-3227de8050f8
-	github.com/nspcc-dev/neofs-api-go v1.24.0
+	github.com/nspcc-dev/neofs-api-go v1.24.1-0.20210312074010-64505180b400
 	github.com/nspcc-dev/neofs-crypto v0.3.0
 	github.com/nspcc-dev/tzhash v1.4.0
 	github.com/panjf2000/ants/v2 v2.3.0
diff --git a/go.sum b/go.sum
index b044e90f..66151a54 100644
Binary files a/go.sum and b/go.sum differ
diff --git a/pkg/innerring/innerring.go b/pkg/innerring/innerring.go
index d49598fc..4f2c0140 100644
--- a/pkg/innerring/innerring.go
+++ b/pkg/innerring/innerring.go
@@ -362,6 +362,7 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 		MorphClient:       server.morphClient,
 		IRList:            server,
 		ClientCache:       clientCache,
+		Key:               server.key,
 		RPCSearchTimeout:  cfg.GetDuration("audit.timeout.search"),
 		TaskManager:       auditTaskManager,
 		Reporter:          server,
diff --git a/pkg/innerring/processors/audit/process.go b/pkg/innerring/processors/audit/process.go
index fa040ee6..625b9e1f 100644
--- a/pkg/innerring/processors/audit/process.go
+++ b/pkg/innerring/processors/audit/process.go
@@ -136,7 +136,7 @@ func (ap *Processor) findStorageGroups(cid *container.ID, shuffled netmap.Nodes)
 		sgSearchParams.WithSearchFilters(sgFilter)
 
 		ctx, cancel := context.WithTimeout(context.Background(), ap.searchTimeout)
-		result, err := cli.SearchObject(ctx, sgSearchParams)
+		result, err := cli.SearchObject(ctx, sgSearchParams, client.WithKey(ap.key))
 		cancel()
 
 		if err != nil {
diff --git a/pkg/innerring/processors/audit/processor.go b/pkg/innerring/processors/audit/processor.go
index 370c5bff..83d6c27e 100644
--- a/pkg/innerring/processors/audit/processor.go
+++ b/pkg/innerring/processors/audit/processor.go
@@ -2,6 +2,7 @@ package audit
 
 import (
 	"context"
+	"crypto/ecdsa"
 	"time"
 
 	"github.com/nspcc-dev/neo-go/pkg/util"
@@ -46,6 +47,7 @@ type (
 		morphClient       *client.Client
 		irList            Indexer
 		clientCache       NeoFSClientCache
+		key               *ecdsa.PrivateKey
 		searchTimeout     time.Duration
 
 		containerClient *wrapContainer.Wrapper
@@ -68,6 +70,7 @@ type (
 		RPCSearchTimeout  time.Duration
 		TaskManager       TaskManager
 		Reporter          audit.Reporter
+		Key               *ecdsa.PrivateKey
 	}
 )
 
@@ -97,6 +100,8 @@ func New(p *Params) (*Processor, error) {
 		return nil, errors.New("ir/audit: audit task manager is not set")
 	case p.Reporter == nil:
 		return nil, errors.New("ir/audit: audit result reporter is not set")
+	case p.Key == nil:
+		return nil, errors.New("ir/audit: signing key is not set")
 	}
 
 	pool, err := ants.NewPool(ProcessorPoolSize, ants.WithNonblocking(true))
@@ -124,6 +129,7 @@ func New(p *Params) (*Processor, error) {
 		morphClient:       p.MorphClient,
 		irList:            p.IRList,
 		clientCache:       p.ClientCache,
+		key:               p.Key,
 		searchTimeout:     p.RPCSearchTimeout,
 		containerClient:   containerClient,
 		netmapClient:      netmapClient,
diff --git a/pkg/innerring/rpc.go b/pkg/innerring/rpc.go
index 756dc82b..ade8452f 100644
--- a/pkg/innerring/rpc.go
+++ b/pkg/innerring/rpc.go
@@ -47,7 +47,9 @@ func newClientCache(p *clientCacheParams) *ClientCache {
 }
 
 func (c *ClientCache) Get(address string, opts ...client.Option) (*client.Client, error) {
-	return c.cache.Get(c.key, address, opts...)
+	// Because cache is used by `ClientCache` exclusively,
+	// client will always have valid key.
+	return c.cache.Get(address, opts...)
 }
 
 // GetSG polls the container from audit task to get the object by id.
@@ -89,7 +91,7 @@ func (c *ClientCache) getSG(ctx context.Context, addr *object.Address, nm *netma
 		}
 
 		cctx, cancel := context.WithTimeout(ctx, c.sgTimeout)
-		obj, err := cli.GetObject(cctx, getParams)
+		obj, err := cli.GetObject(cctx, getParams, client.WithKey(c.key))
 
 		cancel()
 
@@ -143,7 +145,9 @@ func (c *ClientCache) GetHeader(task *audit.Task, node *netmap.Node, id *object.
 	}
 
 	cctx, cancel := context.WithTimeout(task.AuditContext(), c.headTimeout)
-	head, err := cli.GetObjectHeader(cctx, headParams, client.WithTTL(ttl))
+	head, err := cli.GetObjectHeader(cctx, headParams,
+		client.WithTTL(ttl),
+		client.WithKey(c.key))
 
 	cancel()
 
@@ -177,7 +181,9 @@ func (c *ClientCache) GetRangeHash(task *audit.Task, node *netmap.Node, id *obje
 	}
 
 	cctx, cancel := context.WithTimeout(task.AuditContext(), c.rangeTimeout)
-	result, err := cli.ObjectPayloadRangeTZ(cctx, rangeParams, client.WithTTL(1))
+	result, err := cli.ObjectPayloadRangeTZ(cctx, rangeParams,
+		client.WithTTL(1),
+		client.WithKey(c.key))
 
 	cancel()
 
diff --git a/pkg/network/cache/client.go b/pkg/network/cache/client.go
index 007fec84..968faa41 100644
--- a/pkg/network/cache/client.go
+++ b/pkg/network/cache/client.go
@@ -1,13 +1,9 @@
 package cache
 
 import (
-	"crypto/ecdsa"
-	"crypto/sha256"
-	"encoding/hex"
 	"sync"
 
 	"github.com/nspcc-dev/neofs-api-go/pkg/client"
-	crypto "github.com/nspcc-dev/neofs-crypto"
 )
 
 type (
@@ -28,11 +24,9 @@ func NewSDKClientCache() *ClientCache {
 }
 
 // Get function returns existing client or creates a new one.
-func (c *ClientCache) Get(key *ecdsa.PrivateKey, address string, opts ...client.Option) (*client.Client, error) {
-	id := uniqueID(key, address)
-
+func (c *ClientCache) Get(address string, opts ...client.Option) (*client.Client, error) {
 	c.mu.RLock()
-	if cli, ok := c.clients[id]; ok {
+	if cli, ok := c.clients[address]; ok {
 		// todo: check underlying connection neofs-api-go#196
 		c.mu.RUnlock()
 
@@ -46,22 +40,16 @@ func (c *ClientCache) Get(key *ecdsa.PrivateKey, address string, opts ...client.
 
 	// check once again if client is missing in cache, concurrent routine could
 	// create client while this routine was locked on `c.mu.Lock()`.
-	if cli, ok := c.clients[id]; ok {
+	if cli, ok := c.clients[address]; ok {
 		return cli, nil
 	}
 
-	cli, err := client.New(key, append(opts, client.WithAddress(address))...)
+	cli, err := client.New(nil, append(opts, client.WithAddress(address))...)
 	if err != nil {
 		return nil, err
 	}
 
-	c.clients[id] = cli
+	c.clients[address] = cli
 
 	return cli, nil
 }
-
-func uniqueID(key *ecdsa.PrivateKey, address string) string {
-	keyFingerprint := sha256.Sum256(crypto.MarshalPrivateKey(key))
-
-	return hex.EncodeToString(keyFingerprint[:]) + address
-}
diff --git a/pkg/services/object/get/exec.go b/pkg/services/object/get/exec.go
index 900c0cdd..88222685 100644
--- a/pkg/services/object/get/exec.go
+++ b/pkg/services/object/get/exec.go
@@ -111,7 +111,7 @@ func (exec execCtx) key() *ecdsa.PrivateKey {
 func (exec execCtx) callOptions() []client.CallOption {
 	return exec.prm.common.RemoteCallOptions(
 		util.WithNetmapEpoch(exec.curProcEpoch),
-	)
+		util.WithKey(exec.key()))
 }
 
 func (exec execCtx) remotePrm() *client.GetObjectParams {
@@ -276,7 +276,7 @@ func (exec execCtx) remoteClient(node *network.Address) (getClient, bool) {
 
 		log.Debug("could not calculate node IP address")
 	case err == nil:
-		c, err := exec.svc.clientCache.get(exec.key(), ipAddr)
+		c, err := exec.svc.clientCache.get(ipAddr)
 
 		switch {
 		default:
diff --git a/pkg/services/object/get/get_test.go b/pkg/services/object/get/get_test.go
index f5df9cdf..f7d5fcd6 100644
--- a/pkg/services/object/get/get_test.go
+++ b/pkg/services/object/get/get_test.go
@@ -2,7 +2,6 @@ package getsvc
 
 import (
 	"context"
-	"crypto/ecdsa"
 	"crypto/rand"
 	"crypto/sha256"
 	"fmt"
@@ -81,7 +80,7 @@ func (p *testPlacementBuilder) BuildPlacement(addr *objectSDK.Address, _ *netmap
 	return vs, nil
 }
 
-func (c *testClientCache) get(_ *ecdsa.PrivateKey, addr string) (getClient, error) {
+func (c *testClientCache) get(addr string) (getClient, error) {
 	v, ok := c.clients[addr]
 	if !ok {
 		return nil, errors.New("could not construct client")
diff --git a/pkg/services/object/get/service.go b/pkg/services/object/get/service.go
index e0263985..d67ae0d1 100644
--- a/pkg/services/object/get/service.go
+++ b/pkg/services/object/get/service.go
@@ -1,8 +1,6 @@
 package getsvc
 
 import (
-	"crypto/ecdsa"
-
 	"github.com/nspcc-dev/neofs-api-go/pkg/client"
 	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-node/pkg/core/netmap"
@@ -37,7 +35,7 @@ type cfg struct {
 	}
 
 	clientCache interface {
-		get(*ecdsa.PrivateKey, string) (getClient, error)
+		get(string) (getClient, error)
 	}
 
 	traverserGenerator interface {
diff --git a/pkg/services/object/get/util.go b/pkg/services/object/get/util.go
index a3354980..db2c7022 100644
--- a/pkg/services/object/get/util.go
+++ b/pkg/services/object/get/util.go
@@ -1,7 +1,6 @@
 package getsvc
 
 import (
-	"crypto/ecdsa"
 	"io"
 
 	"github.com/nspcc-dev/neofs-api-go/pkg/client"
@@ -75,8 +74,8 @@ func (s *SimpleObjectWriter) Object() *object.Object {
 	return s.obj.Object()
 }
 
-func (c *clientCacheWrapper) get(key *ecdsa.PrivateKey, addr string) (getClient, error) {
-	clt, err := c.cache.Get(key, addr, c.opts...)
+func (c *clientCacheWrapper) get(addr string) (getClient, error) {
+	clt, err := c.cache.Get(addr, c.opts...)
 
 	return &clientWrapper{
 		client: clt,
diff --git a/pkg/services/object/head/remote.go b/pkg/services/object/head/remote.go
index bd7a692b..a54e3786 100644
--- a/pkg/services/object/head/remote.go
+++ b/pkg/services/object/head/remote.go
@@ -70,7 +70,7 @@ func (h *RemoteHeader) Head(ctx context.Context, prm *RemoteHeadPrm) (*object.Ob
 		return nil, err
 	}
 
-	c, err := h.clientCache.Get(key, addr, h.clientOpts...)
+	c, err := h.clientCache.Get(addr, h.clientOpts...)
 	if err != nil {
 		return nil, errors.Wrapf(err, "(%T) could not create SDK client %s", h, addr)
 	}
@@ -87,6 +87,7 @@ func (h *RemoteHeader) Head(ctx context.Context, prm *RemoteHeadPrm) (*object.Ob
 		client.WithTTL(1), // FIXME: use constant
 		client.WithSession(prm.commonHeadPrm.common.SessionToken()),
 		client.WithBearer(prm.commonHeadPrm.common.BearerToken()),
+		client.WithKey(key),
 	)
 	if err != nil {
 		return nil, errors.Wrapf(err, "(%T) could not head object in %s", h, addr)
diff --git a/pkg/services/object/put/remote.go b/pkg/services/object/put/remote.go
index f1c72526..30d4be04 100644
--- a/pkg/services/object/put/remote.go
+++ b/pkg/services/object/put/remote.go
@@ -64,7 +64,7 @@ func (t *remoteTarget) Close() (*transformer.AccessIdentifiers, error) {
 		return nil, err
 	}
 
-	c, err := t.clientCache.Get(key, addr, t.clientOpts...)
+	c, err := t.clientCache.Get(addr, t.clientOpts...)
 	if err != nil {
 		return nil, errors.Wrapf(err, "(%T) could not create SDK client %s", t, addr)
 	}
@@ -76,6 +76,7 @@ func (t *remoteTarget) Close() (*transformer.AccessIdentifiers, error) {
 		append(
 			t.commonPrm.RemoteCallOptions(),
 			client.WithTTL(1), // FIXME: use constant
+			client.WithKey(key),
 		)...,
 	)
 	if err != nil {
diff --git a/pkg/services/object/search/exec.go b/pkg/services/object/search/exec.go
index 3c7194bb..4803770f 100644
--- a/pkg/services/object/search/exec.go
+++ b/pkg/services/object/search/exec.go
@@ -69,6 +69,7 @@ func (exec execCtx) key() *ecdsa.PrivateKey {
 func (exec execCtx) callOptions() []client.CallOption {
 	return exec.prm.common.RemoteCallOptions(
 		util.WithNetmapEpoch(exec.curProcEpoch),
+		util.WithKey(exec.key()),
 	)
 }
 
@@ -146,7 +147,7 @@ func (exec execCtx) remoteClient(node *network.Address) (searchClient, bool) {
 
 		log.Debug("could not calculate node IP address")
 	case err == nil:
-		c, err := exec.svc.clientCache.get(exec.key(), ipAddr)
+		c, err := exec.svc.clientCache.get(ipAddr)
 
 		switch {
 		default:
diff --git a/pkg/services/object/search/search_test.go b/pkg/services/object/search/search_test.go
index 3b7a7969..4def0f93 100644
--- a/pkg/services/object/search/search_test.go
+++ b/pkg/services/object/search/search_test.go
@@ -2,7 +2,6 @@ package searchsvc
 
 import (
 	"context"
-	"crypto/ecdsa"
 	"crypto/rand"
 	"crypto/sha256"
 	"fmt"
@@ -83,7 +82,7 @@ func (p *testPlacementBuilder) BuildPlacement(addr *objectSDK.Address, _ *netmap
 	return res, nil
 }
 
-func (c *testClientCache) get(_ *ecdsa.PrivateKey, addr string) (searchClient, error) {
+func (c *testClientCache) get(addr string) (searchClient, error) {
 	v, ok := c.clients[addr]
 	if !ok {
 		return nil, errors.New("could not construct client")
diff --git a/pkg/services/object/search/service.go b/pkg/services/object/search/service.go
index ccaa4daf..046b7732 100644
--- a/pkg/services/object/search/service.go
+++ b/pkg/services/object/search/service.go
@@ -1,8 +1,6 @@
 package searchsvc
 
 import (
-	"crypto/ecdsa"
-
 	"github.com/nspcc-dev/neofs-api-go/pkg/client"
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
@@ -36,7 +34,7 @@ type cfg struct {
 	}
 
 	clientCache interface {
-		get(*ecdsa.PrivateKey, string) (searchClient, error)
+		get(string) (searchClient, error)
 	}
 
 	traverserGenerator interface {
diff --git a/pkg/services/object/search/util.go b/pkg/services/object/search/util.go
index a59cfebf..3485d559 100644
--- a/pkg/services/object/search/util.go
+++ b/pkg/services/object/search/util.go
@@ -1,7 +1,6 @@
 package searchsvc
 
 import (
-	"crypto/ecdsa"
 	"sync"
 
 	"github.com/nspcc-dev/neofs-api-go/pkg/client"
@@ -71,8 +70,8 @@ func (w *uniqueIDWriter) WriteIDs(list []*objectSDK.ID) error {
 	return w.writer.WriteIDs(list)
 }
 
-func (c *clientCacheWrapper) get(key *ecdsa.PrivateKey, addr string) (searchClient, error) {
-	clt, err := c.cache.Get(key, addr, c.opts...)
+func (c *clientCacheWrapper) get(addr string) (searchClient, error) {
+	clt, err := c.cache.Get(addr, c.opts...)
 
 	return &clientWrapper{
 		client: clt,
diff --git a/pkg/services/object/util/prm.go b/pkg/services/object/util/prm.go
index f8b4eb71..ea54574e 100644
--- a/pkg/services/object/util/prm.go
+++ b/pkg/services/object/util/prm.go
@@ -116,6 +116,13 @@ func WithNetmapEpoch(v uint64) DynamicCallOption {
 	}
 }
 
+// WithKey sets key to use for the request.
+func WithKey(key *ecdsa.PrivateKey) DynamicCallOption {
+	return func(o *remoteCallOpts) {
+		o.opts = append(o.opts, client.WithKey(key))
+	}
+}
+
 func (p *CommonPrm) SessionToken() *token.SessionToken {
 	if p != nil {
 		return p.token