diff --git a/pool/pool.go b/pool/pool.go
index 982378c..21195d4 100644
--- a/pool/pool.go
+++ b/pool/pool.go
@@ -31,24 +31,421 @@ import (
 	"go.uber.org/zap"
 )
 
-// client is a wrapper for sdkClient.Client to generate mock.
+// client represents virtual connection to the single NeoFS network endpoint from which Pool is formed.
 type client interface {
-	BalanceGet(context.Context, sdkClient.PrmBalanceGet) (*sdkClient.ResBalanceGet, error)
-	ContainerPut(context.Context, sdkClient.PrmContainerPut) (*sdkClient.ResContainerPut, error)
-	ContainerGet(context.Context, sdkClient.PrmContainerGet) (*sdkClient.ResContainerGet, error)
-	ContainerList(context.Context, sdkClient.PrmContainerList) (*sdkClient.ResContainerList, error)
-	ContainerDelete(context.Context, sdkClient.PrmContainerDelete) (*sdkClient.ResContainerDelete, error)
-	ContainerEACL(context.Context, sdkClient.PrmContainerEACL) (*sdkClient.ResContainerEACL, error)
-	ContainerSetEACL(context.Context, sdkClient.PrmContainerSetEACL) (*sdkClient.ResContainerSetEACL, error)
-	EndpointInfo(context.Context, sdkClient.PrmEndpointInfo) (*sdkClient.ResEndpointInfo, error)
-	NetworkInfo(context.Context, sdkClient.PrmNetworkInfo) (*sdkClient.ResNetworkInfo, error)
-	ObjectPutInit(context.Context, sdkClient.PrmObjectPutInit) (*sdkClient.ObjectWriter, error)
-	ObjectDelete(context.Context, sdkClient.PrmObjectDelete) (*sdkClient.ResObjectDelete, error)
-	ObjectGetInit(context.Context, sdkClient.PrmObjectGet) (*sdkClient.ObjectReader, error)
-	ObjectHead(context.Context, sdkClient.PrmObjectHead) (*sdkClient.ResObjectHead, error)
-	ObjectRangeInit(context.Context, sdkClient.PrmObjectRange) (*sdkClient.ObjectRangeReader, error)
-	ObjectSearchInit(context.Context, sdkClient.PrmObjectSearch) (*sdkClient.ObjectListReader, error)
-	SessionCreate(context.Context, sdkClient.PrmSessionCreate) (*sdkClient.ResSessionCreate, error)
+	BalanceGet(context.Context, PrmBalanceGet) (*accounting.Decimal, error)
+	ContainerPut(context.Context, PrmContainerPut) (*cid.ID, error)
+	ContainerGet(context.Context, PrmContainerGet) (*container.Container, error)
+	ContainerList(context.Context, PrmContainerList) ([]cid.ID, error)
+	ContainerDelete(context.Context, PrmContainerDelete) error
+	ContainerEACL(context.Context, PrmContainerEACL) (*eacl.Table, error)
+	ContainerSetEACL(context.Context, PrmContainerSetEACL) error
+	EndpointInfo(context.Context, PrmEndpointInfo) (*netmap.NodeInfo, error)
+	NetworkInfo(context.Context, PrmNetworkInfo) (*netmap.NetworkInfo, error)
+	ObjectPut(context.Context, PrmObjectPut) (*oid.ID, error)
+	ObjectDelete(context.Context, PrmObjectDelete) error
+	ObjectGet(context.Context, PrmObjectGet) (*ResGetObject, error)
+	ObjectHead(context.Context, PrmObjectHead) (*object.Object, error)
+	ObjectRange(context.Context, PrmObjectRange) (*ResObjectRange, error)
+	ObjectSearch(context.Context, PrmObjectSearch) (*ResObjectSearch, error)
+	SessionCreate(context.Context, PrmCreateSession) (*ResCreateSession, error)
+}
+
+// clientWrapper is used by default, alternative implementations are intended for testing purposes only.
+type clientWrapper struct {
+	client *sdkClient.Client
+	key    ecdsa.PrivateKey
+}
+
+type wrapperPrm struct {
+	address              string
+	key                  ecdsa.PrivateKey
+	timeout              time.Duration
+	responseInfoCallback func(sdkClient.ResponseMetaInfo) error
+}
+
+func (x *wrapperPrm) setAddress(address string) {
+	x.address = address
+}
+
+func (x *wrapperPrm) setKey(key ecdsa.PrivateKey) {
+	x.key = key
+}
+
+func (x *wrapperPrm) setTimeout(timeout time.Duration) {
+	x.timeout = timeout
+}
+
+func (x *wrapperPrm) setResponseInfoCallback(f func(sdkClient.ResponseMetaInfo) error) {
+	x.responseInfoCallback = f
+}
+
+func newWrapper(prm wrapperPrm) (*clientWrapper, error) {
+	var prmInit sdkClient.PrmInit
+	prmInit.ResolveNeoFSFailures()
+	prmInit.SetDefaultPrivateKey(prm.key)
+	prmInit.SetResponseInfoCallback(prm.responseInfoCallback)
+
+	var c sdkClient.Client
+	c.Init(prmInit)
+
+	var prmDial sdkClient.PrmDial
+	prmDial.SetServerURI(prm.address)
+	prmDial.SetTimeout(prm.timeout)
+
+	return &clientWrapper{client: &c, key: prm.key}, c.Dial(prmDial)
+}
+
+func (c *clientWrapper) BalanceGet(ctx context.Context, prm PrmBalanceGet) (*accounting.Decimal, error) {
+	var cliPrm sdkClient.PrmBalanceGet
+	cliPrm.SetAccount(prm.ownerID)
+
+	res, err := c.client.BalanceGet(ctx, cliPrm)
+	if err != nil {
+		return nil, err
+	}
+	return res.Amount(), nil
+}
+
+func (c *clientWrapper) ContainerPut(ctx context.Context, prm PrmContainerPut) (*cid.ID, error) {
+	var cliPrm sdkClient.PrmContainerPut
+	cliPrm.SetContainer(prm.cnr)
+
+	res, err := c.client.ContainerPut(ctx, cliPrm)
+	if err != nil {
+		return nil, err
+	}
+
+	if !prm.waitParamsSet {
+		prm.waitParams.setDefaults()
+	}
+
+	return res.ID(), waitForContainerPresence(ctx, c, res.ID(), &prm.waitParams)
+}
+
+func (c *clientWrapper) ContainerGet(ctx context.Context, prm PrmContainerGet) (*container.Container, error) {
+	var cliPrm sdkClient.PrmContainerGet
+	cliPrm.SetContainer(prm.cnrID)
+
+	res, err := c.client.ContainerGet(ctx, cliPrm)
+	if err != nil {
+		return nil, err
+	}
+	return res.Container(), nil
+}
+
+func (c *clientWrapper) ContainerList(ctx context.Context, prm PrmContainerList) ([]cid.ID, error) {
+	var cliPrm sdkClient.PrmContainerList
+	cliPrm.SetAccount(prm.ownerID)
+
+	res, err := c.client.ContainerList(ctx, cliPrm)
+	if err != nil {
+		return nil, err
+	}
+	return res.Containers(), nil
+}
+
+func (c *clientWrapper) ContainerDelete(ctx context.Context, prm PrmContainerDelete) error {
+	var cliPrm sdkClient.PrmContainerDelete
+	cliPrm.SetContainer(prm.cnrID)
+	cliPrm.SetSessionToken(prm.stoken)
+
+	if _, err := c.client.ContainerDelete(ctx, cliPrm); err != nil {
+		return err
+	}
+
+	if !prm.waitParamsSet {
+		prm.waitParams.setDefaults()
+	}
+
+	return waitForContainerRemoved(ctx, c, &prm.cnrID, &prm.waitParams)
+}
+
+func (c *clientWrapper) ContainerEACL(ctx context.Context, prm PrmContainerEACL) (*eacl.Table, error) {
+	var cliPrm sdkClient.PrmContainerEACL
+	cliPrm.SetContainer(prm.cnrID)
+
+	res, err := c.client.ContainerEACL(ctx, cliPrm)
+	if err != nil {
+		return nil, err
+	}
+	return res.Table(), nil
+}
+
+func (c *clientWrapper) ContainerSetEACL(ctx context.Context, prm PrmContainerSetEACL) error {
+	var cliPrm sdkClient.PrmContainerSetEACL
+	cliPrm.SetTable(prm.table)
+
+	if _, err := c.client.ContainerSetEACL(ctx, cliPrm); err != nil {
+		return err
+	}
+
+	if !prm.waitParamsSet {
+		prm.waitParams.setDefaults()
+	}
+
+	return waitForEACLPresence(ctx, c, prm.table.CID(), &prm.table, &prm.waitParams)
+}
+
+func (c *clientWrapper) EndpointInfo(ctx context.Context, _ PrmEndpointInfo) (*netmap.NodeInfo, error) {
+	res, err := c.client.EndpointInfo(ctx, sdkClient.PrmEndpointInfo{})
+	if err != nil {
+		return nil, err
+	}
+	return res.NodeInfo(), nil
+}
+
+func (c *clientWrapper) NetworkInfo(ctx context.Context, _ PrmNetworkInfo) (*netmap.NetworkInfo, error) {
+	res, err := c.client.NetworkInfo(ctx, sdkClient.PrmNetworkInfo{})
+	if err != nil {
+		return nil, err
+	}
+	return res.Info(), nil
+}
+
+func (c *clientWrapper) ObjectPut(ctx context.Context, prm PrmObjectPut) (*oid.ID, error) {
+	var cliPrm sdkClient.PrmObjectPutInit
+	wObj, err := c.client.ObjectPutInit(ctx, cliPrm)
+	if err != nil {
+		return nil, fmt.Errorf("init writing on API client: %w", err)
+	}
+
+	if prm.stoken != nil {
+		wObj.WithinSession(*prm.stoken)
+	}
+	wObj.UseKey(*prm.key)
+
+	if prm.btoken != nil {
+		wObj.WithBearerToken(*prm.btoken)
+	}
+
+	if wObj.WriteHeader(prm.hdr) {
+		sz := prm.hdr.PayloadSize()
+
+		if data := prm.hdr.Payload(); len(data) > 0 {
+			if prm.payload != nil {
+				prm.payload = io.MultiReader(bytes.NewReader(data), prm.payload)
+			} else {
+				prm.payload = bytes.NewReader(data)
+				sz = uint64(len(data))
+			}
+		}
+
+		if prm.payload != nil {
+			const defaultBufferSizePut = 3 << 20 // configure?
+
+			if sz == 0 || sz > defaultBufferSizePut {
+				sz = defaultBufferSizePut
+			}
+
+			buf := make([]byte, sz)
+
+			var n int
+
+			for {
+				n, err = prm.payload.Read(buf)
+				if n > 0 {
+					if !wObj.WritePayloadChunk(buf[:n]) {
+						break
+					}
+
+					continue
+				}
+
+				if errors.Is(err, io.EOF) {
+					break
+				}
+
+				return nil, fmt.Errorf("read payload: %w", err)
+			}
+		}
+	}
+
+	res, err := wObj.Close()
+	if err != nil { // here err already carries both status and client errors
+		return nil, fmt.Errorf("client failure: %w", err)
+	}
+
+	var id oid.ID
+
+	if !res.ReadStoredObjectID(&id) {
+		return nil, errors.New("missing ID of the stored object")
+	}
+
+	return &id, nil
+}
+
+func (c *clientWrapper) ObjectDelete(ctx context.Context, prm PrmObjectDelete) error {
+	var cliPrm sdkClient.PrmObjectDelete
+
+	if cnr := prm.addr.ContainerID(); cnr != nil {
+		cliPrm.FromContainer(*cnr)
+	}
+
+	if obj := prm.addr.ObjectID(); obj != nil {
+		cliPrm.ByID(*obj)
+	}
+
+	if prm.stoken != nil {
+		cliPrm.WithinSession(*prm.stoken)
+	}
+
+	if prm.btoken != nil {
+		cliPrm.WithBearerToken(*prm.btoken)
+	}
+
+	cliPrm.UseKey(*prm.key)
+	_, err := c.client.ObjectDelete(ctx, cliPrm)
+	return err
+}
+
+func (c *clientWrapper) ObjectGet(ctx context.Context, prm PrmObjectGet) (*ResGetObject, error) {
+	var cliPrm sdkClient.PrmObjectGet
+
+	if cnr := prm.addr.ContainerID(); cnr != nil {
+		cliPrm.FromContainer(*cnr)
+	}
+
+	if obj := prm.addr.ObjectID(); obj != nil {
+		cliPrm.ByID(*obj)
+	}
+
+	if cnr := prm.addr.ContainerID(); cnr != nil {
+		cliPrm.FromContainer(*cnr)
+	}
+
+	if obj := prm.addr.ObjectID(); obj != nil {
+		cliPrm.ByID(*obj)
+	}
+
+	if prm.stoken != nil {
+		cliPrm.WithinSession(*prm.stoken)
+	}
+
+	if prm.btoken != nil {
+		cliPrm.WithBearerToken(*prm.btoken)
+	}
+
+	var res ResGetObject
+
+	rObj, err := c.client.ObjectGetInit(ctx, cliPrm)
+	if err != nil {
+		return nil, fmt.Errorf("init object reading on client: %w", err)
+	}
+
+	rObj.UseKey(*prm.key)
+
+	if !rObj.ReadHeader(&res.Header) {
+		_, err = rObj.Close()
+		return nil, fmt.Errorf("read header: %w", err)
+	}
+
+	res.Payload = (*objectReadCloser)(rObj)
+
+	return &res, nil
+}
+
+func (c *clientWrapper) ObjectHead(ctx context.Context, prm PrmObjectHead) (*object.Object, error) {
+	var cliPrm sdkClient.PrmObjectHead
+
+	if cnr := prm.addr.ContainerID(); cnr != nil {
+		cliPrm.FromContainer(*cnr)
+	}
+
+	if obj := prm.addr.ObjectID(); obj != nil {
+		cliPrm.ByID(*obj)
+	}
+
+	if prm.stoken != nil {
+		cliPrm.WithinSession(*prm.stoken)
+	}
+
+	if prm.btoken != nil {
+		cliPrm.WithBearerToken(*prm.btoken)
+	}
+
+	cliPrm.UseKey(*prm.key)
+
+	var obj object.Object
+
+	res, err := c.client.ObjectHead(ctx, cliPrm)
+	if err != nil {
+		return nil, fmt.Errorf("read object header via client: %w", err)
+	}
+	if !res.ReadHeader(&obj) {
+		return nil, errors.New("missing object header in response")
+	}
+
+	return &obj, nil
+}
+
+func (c *clientWrapper) ObjectRange(ctx context.Context, prm PrmObjectRange) (*ResObjectRange, error) {
+	var cliPrm sdkClient.PrmObjectRange
+
+	cliPrm.SetOffset(prm.off)
+	cliPrm.SetLength(prm.ln)
+
+	if cnr := prm.addr.ContainerID(); cnr != nil {
+		cliPrm.FromContainer(*cnr)
+	}
+
+	if obj := prm.addr.ObjectID(); obj != nil {
+		cliPrm.ByID(*obj)
+	}
+
+	if prm.stoken != nil {
+		cliPrm.WithinSession(*prm.stoken)
+	}
+
+	if prm.btoken != nil {
+		cliPrm.WithBearerToken(*prm.btoken)
+	}
+
+	res, err := c.client.ObjectRangeInit(ctx, cliPrm)
+	if err != nil {
+		return nil, fmt.Errorf("init payload range reading on client: %w", err)
+	}
+	res.UseKey(*prm.key)
+
+	return &ResObjectRange{payload: res}, nil
+}
+
+func (c *clientWrapper) ObjectSearch(ctx context.Context, prm PrmObjectSearch) (*ResObjectSearch, error) {
+	var cliPrm sdkClient.PrmObjectSearch
+
+	cliPrm.InContainer(prm.cnrID)
+	cliPrm.SetFilters(prm.filters)
+
+	if prm.stoken != nil {
+		cliPrm.WithinSession(*prm.stoken)
+	}
+
+	if prm.btoken != nil {
+		cliPrm.WithBearerToken(*prm.btoken)
+	}
+
+	res, err := c.client.ObjectSearchInit(ctx, cliPrm)
+	if err != nil {
+		return nil, fmt.Errorf("init object searching on client: %w", err)
+	}
+	res.UseKey(*prm.key)
+
+	return &ResObjectSearch{r: res}, nil
+}
+
+func (c *clientWrapper) SessionCreate(ctx context.Context, prm PrmCreateSession) (*ResCreateSession, error) {
+	var cliPrm sdkClient.PrmSessionCreate
+	cliPrm.SetExp(prm.exp)
+
+	res, err := c.client.SessionCreate(ctx, cliPrm)
+	if err != nil {
+		return nil, fmt.Errorf("session creation on client: %w", err)
+	}
+
+	return &ResCreateSession{
+		id:         res.ID(),
+		sessionKey: res.PublicKey(),
+	}, nil
 }
 
 // InitParameters contains values used to initialize connection Pool.
@@ -183,28 +580,30 @@ type clientPack struct {
 	address string
 }
 
-type prmCommon struct {
+type prmContext struct {
 	defaultSession bool
 	verb           sessionv2.ObjectSessionVerb
 	addr           *address.Address
-
-	key    *ecdsa.PrivateKey
-	btoken *token.BearerToken
-	stoken *session.Token
 }
 
-func (x *prmCommon) useDefaultSession() {
+func (x *prmContext) useDefaultSession() {
 	x.defaultSession = true
 }
 
-func (x *prmCommon) useAddress(addr *address.Address) {
+func (x *prmContext) useAddress(addr *address.Address) {
 	x.addr = addr
 }
 
-func (x *prmCommon) useVerb(verb sessionv2.ObjectSessionVerb) {
+func (x *prmContext) useVerb(verb sessionv2.ObjectSessionVerb) {
 	x.verb = verb
 }
 
+type prmCommon struct {
+	key    *ecdsa.PrivateKey
+	btoken *token.BearerToken
+	stoken *session.Token
+}
+
 // UseKey specifies private key to sign the requests.
 // If key is not provided, then Pool default key is used.
 func (x *prmCommon) UseKey(key *ecdsa.PrivateKey) {
@@ -217,8 +616,8 @@ func (x *prmCommon) UseBearer(token *token.BearerToken) {
 }
 
 // UseSession specifies session within which operation should be performed.
-func (x *prmCommon) UseSession(token *session.Token) {
-	x.stoken = token
+func (x *prmCommon) UseSession(token session.Token) {
+	x.stoken = &token
 }
 
 // PrmObjectPut groups parameters of PutObject operation.
@@ -429,6 +828,28 @@ func (x *PrmBalanceGet) SetOwnerID(ownerID owner.ID) {
 	x.ownerID = ownerID
 }
 
+type PrmCreateSession struct {
+	exp uint64
+}
+
+// SetExp sets number of the last NeoFS epoch in the lifetime of the session after which it will be expired.
+func (x *PrmCreateSession) SetExp(exp uint64) {
+	x.exp = exp
+}
+
+// PrmEndpointInfo groups parameters of EndpointInfo operation.
+type PrmEndpointInfo struct{}
+
+// PrmNetworkInfo groups parameters of NetworkInfo operation.
+type PrmNetworkInfo struct{}
+
+// ResCreateSession groups resulting values of SessionCreate operation.
+type ResCreateSession struct {
+	id []byte
+
+	sessionKey []byte
+}
+
 // Pool represents virtual connection to the NeoFS network to communicate
 // with multiple NeoFS servers without thinking about switching between servers
 // due to load balancing proportions or their unavailability.
@@ -580,23 +1001,15 @@ func fillDefaultInitParams(params *InitParameters, cache *sessionCache) {
 
 	if params.clientBuilder == nil {
 		params.clientBuilder = func(addr string) (client, error) {
-			var c sdkClient.Client
-
-			var prmInit sdkClient.PrmInit
-			prmInit.ResolveNeoFSFailures()
-			prmInit.SetDefaultPrivateKey(*params.key)
-			prmInit.SetResponseInfoCallback(func(info sdkClient.ResponseMetaInfo) error {
+			var prm wrapperPrm
+			prm.setAddress(addr)
+			prm.setKey(*params.key)
+			prm.setTimeout(params.nodeDialTimeout)
+			prm.setResponseInfoCallback(func(info sdkClient.ResponseMetaInfo) error {
 				cache.updateEpoch(info.Epoch())
 				return nil
 			})
-
-			c.Init(prmInit)
-
-			var prmDial sdkClient.PrmDial
-			prmDial.SetServerURI(addr)
-			prmDial.SetTimeout(params.nodeDialTimeout)
-
-			return &c, c.Dial(prmDial)
+			return newWrapper(prm)
 		}
 	}
 }
@@ -673,7 +1086,7 @@ func (p *Pool) updateInnerNodesHealth(ctx context.Context, i int, bufferWeights
 	healthyChanged := false
 	wg := sync.WaitGroup{}
 
-	var prmEndpoint sdkClient.PrmEndpointInfo
+	var prmEndpoint PrmEndpointInfo
 
 	for j, cPack := range pool.clientPacks {
 		wg.Add(1)
@@ -787,12 +1200,12 @@ func (p *Pool) checkSessionTokenErr(err error, address string) bool {
 }
 
 func createSessionTokenForDuration(ctx context.Context, c client, ownerID *owner.ID, dur uint64) (*session.Token, error) {
-	ni, err := c.NetworkInfo(ctx, sdkClient.PrmNetworkInfo{})
+	ni, err := c.NetworkInfo(ctx, PrmNetworkInfo{})
 	if err != nil {
 		return nil, err
 	}
 
-	epoch := ni.Info().CurrentEpoch()
+	epoch := ni.CurrentEpoch()
 
 	var exp uint64
 	if math.MaxUint64-epoch < dur {
@@ -800,7 +1213,7 @@ func createSessionTokenForDuration(ctx context.Context, c client, ownerID *owner
 	} else {
 		exp = epoch + dur
 	}
-	var prm sdkClient.PrmSessionCreate
+	var prm PrmCreateSession
 	prm.SetExp(exp)
 
 	res, err := c.SessionCreate(ctx, prm)
@@ -829,7 +1242,7 @@ type callContext struct {
 	sessionContext *session.ObjectContext
 }
 
-func (p *Pool) initCallContext(ctx *callContext, cfg prmCommon) error {
+func (p *Pool) initCallContext(ctx *callContext, cfg prmCommon, prmCtx prmContext) error {
 	cp, err := p.connection()
 	if err != nil {
 		return err
@@ -849,11 +1262,11 @@ func (p *Pool) initCallContext(ctx *callContext, cfg prmCommon) error {
 	}
 
 	// note that we don't override session provided by the caller
-	ctx.sessionDefault = cfg.stoken == nil && cfg.defaultSession
+	ctx.sessionDefault = cfg.stoken == nil && prmCtx.defaultSession
 	if ctx.sessionDefault {
 		ctx.sessionContext = session.NewObjectContext()
-		ctx.sessionContext.ToV2().SetVerb(cfg.verb)
-		ctx.sessionContext.ApplyTo(cfg.addr)
+		ctx.sessionContext.ToV2().SetVerb(prmCtx.verb)
+		ctx.sessionContext.ApplyTo(prmCtx.addr)
 	}
 
 	return err
@@ -910,91 +1323,36 @@ func (p *Pool) call(ctx *callContext, f func() error) error {
 
 // PutObject writes an object through a remote server using NeoFS API protocol.
 func (p *Pool) PutObject(ctx context.Context, prm PrmObjectPut) (*oid.ID, error) {
-	prm.useDefaultSession()
-	prm.useVerb(sessionv2.ObjectVerbPut)
-	prm.useAddress(newAddressFromCnrID(prm.hdr.ContainerID()))
+	var prmCtx prmContext
+	prmCtx.useDefaultSession()
+	prmCtx.useVerb(sessionv2.ObjectVerbPut)
+	prmCtx.useAddress(newAddressFromCnrID(prm.hdr.ContainerID()))
 
 	var ctxCall callContext
 
 	ctxCall.Context = ctx
 
-	if err := p.initCallContext(&ctxCall, prm.prmCommon); err != nil {
+	if err := p.initCallContext(&ctxCall, prm.prmCommon, prmCtx); err != nil {
 		return nil, fmt.Errorf("init call context")
 	}
 
-	var cliPrm sdkClient.PrmObjectPutInit
+	if ctxCall.sessionDefault {
+		ctxCall.sessionTarget = prm.UseSession
+		err = p.openDefaultSession(&ctxCall)
+		if err != nil {
+			return nil, fmt.Errorf("open default session: %w", err)
+		}
+	}
+	prm.key = ctxCall.key
 
-	wObj, err := ctxCall.client.ObjectPutInit(ctx, cliPrm)
+	id, err := ctxCall.client.ObjectPut(ctx, prm)
 	if err != nil {
+		// removes session token from cache in case of token error
+		p.checkSessionTokenErr(err, ctxCall.endpoint)
 		return nil, fmt.Errorf("init writing on API client: %w", err)
 	}
 
-	ctxCall.sessionTarget = wObj.WithinSession
-
-	var resID oid.ID
-
-	err = p.call(&ctxCall, func() error {
-		wObj.UseKey(*ctxCall.key)
-
-		if prm.btoken != nil {
-			wObj.WithBearerToken(*prm.btoken)
-		}
-
-		if wObj.WriteHeader(prm.hdr) {
-			sz := prm.hdr.PayloadSize()
-
-			if data := prm.hdr.Payload(); len(data) > 0 {
-				if prm.payload != nil {
-					prm.payload = io.MultiReader(bytes.NewReader(data), prm.payload)
-				} else {
-					prm.payload = bytes.NewReader(data)
-					sz = uint64(len(data))
-				}
-			}
-
-			if prm.payload != nil {
-				const defaultBufferSizePut = 3 << 20 // configure?
-
-				if sz == 0 || sz > defaultBufferSizePut {
-					sz = defaultBufferSizePut
-				}
-
-				buf := make([]byte, sz)
-
-				var n int
-
-				for {
-					n, err = prm.payload.Read(buf)
-					if n > 0 {
-						if !wObj.WritePayloadChunk(buf[:n]) {
-							break
-						}
-
-						continue
-					}
-
-					if errors.Is(err, io.EOF) {
-						break
-					}
-
-					return fmt.Errorf("read payload: %w", err)
-				}
-			}
-		}
-
-		res, err := wObj.Close()
-		if err != nil {
-			return err
-		}
-
-		if !res.ReadStoredObjectID(&resID) {
-			return errors.New("missing ID of the stored object")
-		}
-
-		return nil
-	})
-
-	return &resID, err
+	return id, nil
 }
 
 // DeleteObject marks an object for deletion from the container using NeoFS API protocol.
@@ -1002,39 +1360,23 @@ func (p *Pool) PutObject(ctx context.Context, prm PrmObjectPut) (*oid.ID, error)
 // It confirms the user's intent to delete the object, and is itself a container object.
 // Explicit deletion is done asynchronously, and is generally not guaranteed.
 func (p *Pool) DeleteObject(ctx context.Context, prm PrmObjectDelete) error {
-	prm.useDefaultSession()
-	prm.useVerb(sessionv2.ObjectVerbDelete)
-	prm.useAddress(&prm.addr)
-
-	var cliPrm sdkClient.PrmObjectDelete
+	var prmCtx prmContext
+	prmCtx.useDefaultSession()
+	prmCtx.useVerb(sessionv2.ObjectVerbDelete)
+	prmCtx.useAddress(&prm.addr)
 
 	var cc callContext
 
 	cc.Context = ctx
-	cc.sessionTarget = cliPrm.WithinSession
+	cc.sessionTarget = prm.UseSession
 
-	err := p.initCallContext(&cc, prm.prmCommon)
+	err := p.initCallContext(&cc, prm.prmCommon, prmCtx)
 	if err != nil {
 		return err
 	}
 
-	if cnr := prm.addr.ContainerID(); cnr != nil {
-		cliPrm.FromContainer(*cnr)
-	}
-
-	if obj := prm.addr.ObjectID(); obj != nil {
-		cliPrm.ByID(*obj)
-	}
-
-	if prm.btoken != nil {
-		cliPrm.WithBearerToken(*prm.btoken)
-	}
-
-	cliPrm.UseKey(*cc.key)
-
 	return p.call(&cc, func() error {
-		_, err = cc.client.ObjectDelete(ctx, cliPrm)
-		if err != nil {
+		if err = cc.client.ObjectDelete(ctx, prm); err != nil {
 			return fmt.Errorf("remove object via client: %w", err)
 		}
 
@@ -1064,111 +1406,49 @@ type ResGetObject struct {
 
 // GetObject reads object header and initiates reading an object payload through a remote server using NeoFS API protocol.
 func (p *Pool) GetObject(ctx context.Context, prm PrmObjectGet) (*ResGetObject, error) {
-	prm.useDefaultSession()
-	prm.useVerb(sessionv2.ObjectVerbGet)
-	prm.useAddress(&prm.addr)
-
-	var cliPrm sdkClient.PrmObjectGet
+	var prmCtx prmContext
+	prmCtx.useDefaultSession()
+	prmCtx.useVerb(sessionv2.ObjectVerbGet)
+	prmCtx.useAddress(&prm.addr)
 
 	var cc callContext
-
 	cc.Context = ctx
-	cc.sessionTarget = cliPrm.WithinSession
+	cc.sessionTarget = prm.UseSession
 
-	err := p.initCallContext(&cc, prm.prmCommon)
+	err := p.initCallContext(&cc, prm.prmCommon, prmCtx)
 	if err != nil {
 		return nil, err
 	}
 
-	if cnr := prm.addr.ContainerID(); cnr != nil {
-		cliPrm.FromContainer(*cnr)
-	}
-
-	if obj := prm.addr.ObjectID(); obj != nil {
-		cliPrm.ByID(*obj)
-	}
-
-	if prm.btoken != nil {
-		cliPrm.WithBearerToken(*prm.btoken)
-	}
-
-	var res ResGetObject
-
-	err = p.call(&cc, func() error {
-		rObj, err := cc.client.ObjectGetInit(ctx, cliPrm)
-		if err != nil {
-			return fmt.Errorf("init object reading on client: %w", err)
-		}
-
-		rObj.UseKey(*cc.key)
-
-		if !rObj.ReadHeader(&res.Header) {
-			_, err = rObj.Close()
-			return fmt.Errorf("read header: %w", err)
-		}
-
-		res.Payload = (*objectReadCloser)(rObj)
-
-		return nil
+	var res *ResGetObject
+	return res, p.call(&cc, func() error {
+		res, err = cc.client.ObjectGet(ctx, prm)
+		return err
 	})
-	if err != nil {
-		return nil, err
-	}
-
-	return &res, nil
 }
 
 // HeadObject reads object header through a remote server using NeoFS API protocol.
 func (p *Pool) HeadObject(ctx context.Context, prm PrmObjectHead) (*object.Object, error) {
-	prm.useDefaultSession()
-	prm.useVerb(sessionv2.ObjectVerbHead)
-	prm.useAddress(&prm.addr)
-
-	var cliPrm sdkClient.PrmObjectHead
+	var prmCtx prmContext
+	prmCtx.useDefaultSession()
+	prmCtx.useVerb(sessionv2.ObjectVerbHead)
+	prmCtx.useAddress(&prm.addr)
 
 	var cc callContext
 
 	cc.Context = ctx
-	cc.sessionTarget = cliPrm.WithinSession
+	cc.sessionTarget = prm.UseSession
 
-	err := p.initCallContext(&cc, prm.prmCommon)
+	err := p.initCallContext(&cc, prm.prmCommon, prmCtx)
 	if err != nil {
 		return nil, err
 	}
 
-	if cnr := prm.addr.ContainerID(); cnr != nil {
-		cliPrm.FromContainer(*cnr)
-	}
-
-	if obj := prm.addr.ObjectID(); obj != nil {
-		cliPrm.ByID(*obj)
-	}
-
-	if prm.btoken != nil {
-		cliPrm.WithBearerToken(*prm.btoken)
-	}
-
-	cliPrm.UseKey(*cc.key)
-
-	var obj object.Object
-
-	err = p.call(&cc, func() error {
-		res, err := cc.client.ObjectHead(ctx, cliPrm)
-		if err != nil {
-			return fmt.Errorf("read object header via client: %w", err)
-		}
-
-		if !res.ReadHeader(&obj) {
-			return errors.New("missing object header in response")
-		}
-
-		return nil
+	var obj *object.Object
+	return obj, p.call(&cc, func() error {
+		obj, err = cc.client.ObjectHead(ctx, prm)
+		return err
 	})
-	if err != nil {
-		return nil, err
-	}
-
-	return &obj, nil
 }
 
 // ResObjectRange is designed to read payload range of one object
@@ -1195,56 +1475,26 @@ func (x *ResObjectRange) Close() error {
 // ObjectRange initiates reading an object's payload range through a remote
 // server using NeoFS API protocol.
 func (p *Pool) ObjectRange(ctx context.Context, prm PrmObjectRange) (*ResObjectRange, error) {
-	prm.useDefaultSession()
-	prm.useVerb(sessionv2.ObjectVerbRange)
-	prm.useAddress(&prm.addr)
-
-	var cliPrm sdkClient.PrmObjectRange
-
-	cliPrm.SetOffset(prm.off)
-	cliPrm.SetLength(prm.ln)
+	var prmCtx prmContext
+	prmCtx.useDefaultSession()
+	prmCtx.useVerb(sessionv2.ObjectVerbRange)
+	prmCtx.useAddress(&prm.addr)
 
 	var cc callContext
-
 	cc.Context = ctx
-	cc.sessionTarget = cliPrm.WithinSession
+	cc.sessionTarget = prm.UseSession
 
-	err := p.initCallContext(&cc, prm.prmCommon)
+	err := p.initCallContext(&cc, prm.prmCommon, prmCtx)
 	if err != nil {
 		return nil, err
 	}
 
-	if cnr := prm.addr.ContainerID(); cnr != nil {
-		cliPrm.FromContainer(*cnr)
-	}
+	var res *ResObjectRange
 
-	if obj := prm.addr.ObjectID(); obj != nil {
-		cliPrm.ByID(*obj)
-	}
-
-	if prm.btoken != nil {
-		cliPrm.WithBearerToken(*prm.btoken)
-	}
-
-	var res ResObjectRange
-
-	err = p.call(&cc, func() error {
-		var err error
-
-		res.payload, err = cc.client.ObjectRangeInit(ctx, cliPrm)
-		if err != nil {
-			return fmt.Errorf("init payload range reading on client: %w", err)
-		}
-
-		res.payload.UseKey(*cc.key)
-
-		return nil
+	return res, p.call(&cc, func() error {
+		res, err = cc.client.ObjectRange(ctx, prm)
+		return err
 	})
-	if err != nil {
-		return nil, err
-	}
-
-	return &res, nil
 }
 
 // ResObjectSearch is designed to read list of object identifiers from NeoFS system.
@@ -1289,48 +1539,27 @@ func (x *ResObjectSearch) Close() {
 // is done using the ResObjectSearch. Exactly one return value is non-nil.
 // Resulting reader must be finally closed.
 func (p *Pool) SearchObjects(ctx context.Context, prm PrmObjectSearch) (*ResObjectSearch, error) {
-	prm.useDefaultSession()
-	prm.useVerb(sessionv2.ObjectVerbSearch)
-	prm.useAddress(newAddressFromCnrID(&prm.cnrID))
-
-	var cliPrm sdkClient.PrmObjectSearch
-
-	cliPrm.InContainer(prm.cnrID)
-	cliPrm.SetFilters(prm.filters)
-
-	if prm.btoken != nil {
-		cliPrm.WithBearerToken(*prm.btoken)
-	}
+	var prmCtx prmContext
+	prmCtx.useDefaultSession()
+	prmCtx.useVerb(sessionv2.ObjectVerbSearch)
+	prmCtx.useAddress(newAddressFromCnrID(&prm.cnrID))
 
 	var cc callContext
 
 	cc.Context = ctx
-	cc.sessionTarget = cliPrm.WithinSession
+	cc.sessionTarget = prm.UseSession
 
-	err := p.initCallContext(&cc, prm.prmCommon)
+	err := p.initCallContext(&cc, prm.prmCommon, prmCtx)
 	if err != nil {
 		return nil, err
 	}
 
-	var res ResObjectSearch
+	var res *ResObjectSearch
 
-	err = p.call(&cc, func() error {
-		var err error
-
-		res.r, err = cc.client.ObjectSearchInit(ctx, cliPrm)
-		if err != nil {
-			return fmt.Errorf("init object searching on client: %w", err)
-		}
-
-		res.r.UseKey(*cc.key)
-
-		return nil
+	return res, p.call(&cc, func() error {
+		res, err = cc.client.ObjectSearch(ctx, prm)
+		return err
 	})
-	if err != nil {
-		return nil, err
-	}
-
-	return &res, nil
 }
 
 // PutContainer sends request to save container in NeoFS and waits for the operation to complete.
@@ -1346,19 +1575,7 @@ func (p *Pool) PutContainer(ctx context.Context, prm PrmContainerPut) (*cid.ID,
 		return nil, err
 	}
 
-	var cliPrm sdkClient.PrmContainerPut
-	cliPrm.SetContainer(prm.cnr)
-
-	res, err := cp.client.ContainerPut(ctx, cliPrm)
-	if err != nil { // here err already carries both status and client errors
-		return nil, err
-	}
-
-	if !prm.waitParamsSet {
-		prm.waitParams.setDefaults()
-	}
-
-	return res.ID(), waitForContainerPresence(ctx, p, res.ID(), &prm.waitParams)
+	return cp.client.ContainerPut(ctx, prm)
 }
 
 // GetContainer reads NeoFS container by ID.
@@ -1368,15 +1585,7 @@ func (p *Pool) GetContainer(ctx context.Context, prm PrmContainerGet) (*containe
 		return nil, err
 	}
 
-	var cliPrm sdkClient.PrmContainerGet
-	cliPrm.SetContainer(prm.cnrID)
-
-	res, err := cp.client.ContainerGet(ctx, cliPrm)
-	if err != nil { // here err already carries both status and client errors
-		return nil, err
-	}
-
-	return res.Container(), nil
+	return cp.client.ContainerGet(ctx, prm)
 }
 
 // ListContainers requests identifiers of the account-owned containers.
@@ -1386,15 +1595,7 @@ func (p *Pool) ListContainers(ctx context.Context, prm PrmContainerList) ([]cid.
 		return nil, err
 	}
 
-	var cliPrm sdkClient.PrmContainerList
-	cliPrm.SetAccount(prm.ownerID)
-
-	res, err := cp.client.ContainerList(ctx, cliPrm)
-	if err != nil { // here err already carries both status and client errors
-		return nil, err
-	}
-
-	return res.Containers(), nil
+	return cp.client.ContainerList(ctx, prm)
 }
 
 // DeleteContainer sends request to remove the NeoFS container and waits for the operation to complete.
@@ -1410,23 +1611,7 @@ func (p *Pool) DeleteContainer(ctx context.Context, prm PrmContainerDelete) erro
 		return err
 	}
 
-	var cliPrm sdkClient.PrmContainerDelete
-	cliPrm.SetContainer(prm.cnrID)
-	cliPrm.SetSessionToken(prm.stoken)
-
-	_, err = cp.client.ContainerDelete(ctx, cliPrm)
-
-	// here err already carries both status and client errors
-
-	if err != nil {
-		return err
-	}
-
-	if !prm.waitParamsSet {
-		prm.waitParams.setDefaults()
-	}
-
-	return waitForContainerRemoved(ctx, p, &prm.cnrID, &prm.waitParams)
+	return cp.client.ContainerDelete(ctx, prm)
 }
 
 // GetEACL reads eACL table of the NeoFS container.
@@ -1436,15 +1621,7 @@ func (p *Pool) GetEACL(ctx context.Context, prm PrmContainerEACL) (*eacl.Table,
 		return nil, err
 	}
 
-	var cliPrm sdkClient.PrmContainerEACL
-	cliPrm.SetContainer(prm.cnrID)
-
-	res, err := cp.client.ContainerEACL(ctx, cliPrm)
-	if err != nil { // here err already carries both status and client errors
-		return nil, err
-	}
-
-	return res.Table(), nil
+	return cp.client.ContainerEACL(ctx, prm)
 }
 
 // SetEACL sends request to update eACL table of the NeoFS container and waits for the operation to complete.
@@ -1460,22 +1637,7 @@ func (p *Pool) SetEACL(ctx context.Context, prm PrmContainerSetEACL) error {
 		return err
 	}
 
-	var cliPrm sdkClient.PrmContainerSetEACL
-	cliPrm.SetTable(prm.table)
-
-	_, err = cp.client.ContainerSetEACL(ctx, cliPrm)
-
-	// here err already carries both status and client errors
-
-	if err != nil {
-		return err
-	}
-
-	if !prm.waitParamsSet {
-		prm.waitParams.setDefaults()
-	}
-
-	return waitForEACLPresence(ctx, p, prm.table.CID(), &prm.table, &prm.waitParams)
+	return cp.client.ContainerSetEACL(ctx, prm)
 }
 
 // Balance requests current balance of the NeoFS account.
@@ -1485,39 +1647,31 @@ func (p *Pool) Balance(ctx context.Context, prm PrmBalanceGet) (*accounting.Deci
 		return nil, err
 	}
 
-	var cliPrm sdkClient.PrmBalanceGet
-	cliPrm.SetAccount(prm.ownerID)
-
-	res, err := cp.client.BalanceGet(ctx, cliPrm)
-	if err != nil { // here err already carries both status and client errors
-		return nil, err
-	}
-
-	return res.Amount(), nil
+	return cp.client.BalanceGet(ctx, prm)
 }
 
 // waitForContainerPresence waits until the container is found on the NeoFS network.
-func waitForContainerPresence(ctx context.Context, pool *Pool, cnrID *cid.ID, waitParams *WaitParams) error {
+func waitForContainerPresence(ctx context.Context, cli client, cnrID *cid.ID, waitParams *WaitParams) error {
 	var prm PrmContainerGet
 	if cnrID != nil {
 		prm.SetContainerID(*cnrID)
 	}
 
 	return waitFor(ctx, waitParams, func(ctx context.Context) bool {
-		_, err := pool.GetContainer(ctx, prm)
+		_, err := cli.ContainerGet(ctx, prm)
 		return err == nil
 	})
 }
 
 // waitForEACLPresence waits until the container eacl is applied on the NeoFS network.
-func waitForEACLPresence(ctx context.Context, pool *Pool, cnrID *cid.ID, table *eacl.Table, waitParams *WaitParams) error {
+func waitForEACLPresence(ctx context.Context, cli client, cnrID *cid.ID, table *eacl.Table, waitParams *WaitParams) error {
 	var prm PrmContainerEACL
 	if cnrID != nil {
 		prm.SetContainerID(*cnrID)
 	}
 
 	return waitFor(ctx, waitParams, func(ctx context.Context) bool {
-		eaclTable, err := pool.GetEACL(ctx, prm)
+		eaclTable, err := cli.ContainerEACL(ctx, prm)
 		if err == nil {
 			return eacl.EqualTables(*table, *eaclTable)
 		}
@@ -1526,14 +1680,14 @@ func waitForEACLPresence(ctx context.Context, pool *Pool, cnrID *cid.ID, table *
 }
 
 // waitForContainerRemoved waits until the container is removed from the NeoFS network.
-func waitForContainerRemoved(ctx context.Context, pool *Pool, cnrID *cid.ID, waitParams *WaitParams) error {
+func waitForContainerRemoved(ctx context.Context, cli client, cnrID *cid.ID, waitParams *WaitParams) error {
 	var prm PrmContainerGet
 	if cnrID != nil {
 		prm.SetContainerID(*cnrID)
 	}
 
 	return waitFor(ctx, waitParams, func(ctx context.Context) bool {
-		_, err := pool.GetContainer(ctx, prm)
+		_, err := cli.ContainerGet(ctx, prm)
 		return sdkClient.IsErrContainerNotFound(err)
 	})
 }
@@ -1568,12 +1722,7 @@ func (p *Pool) NetworkInfo(ctx context.Context) (*netmap.NetworkInfo, error) {
 		return nil, err
 	}
 
-	res, err := cp.client.NetworkInfo(ctx, sdkClient.PrmNetworkInfo{})
-	if err != nil { // here err already carries both status and client errors
-		return nil, err
-	}
-
-	return res.Info(), nil
+	return cp.client.NetworkInfo(ctx, PrmNetworkInfo{})
 }
 
 // Close closes the Pool and releases all the associated resources.
@@ -1583,11 +1732,11 @@ func (p *Pool) Close() {
 }
 
 // creates new session token with specified owner from SessionCreate call result.
-func sessionTokenForOwner(id *owner.ID, cliRes *sdkClient.ResSessionCreate, exp uint64) *session.Token {
+func sessionTokenForOwner(id *owner.ID, cliRes *ResCreateSession, exp uint64) *session.Token {
 	st := session.NewToken()
 	st.SetOwnerID(id)
-	st.SetID(cliRes.ID())
-	st.SetSessionKey(cliRes.PublicKey())
+	st.SetID(cliRes.id)
+	st.SetSessionKey(cliRes.sessionKey)
 	st.SetExp(exp)
 
 	return st