diff --git a/client/accounting.go b/client/accounting.go
index 402554f..d0aa653 100644
--- a/client/accounting.go
+++ b/client/accounting.go
@@ -79,7 +79,7 @@ func (c *Client) BalanceGet(ctx context.Context, prm PrmBalanceGet) (*ResBalance
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
diff --git a/client/client.go b/client/client.go
index ba57b41..c111f02 100644
--- a/client/client.go
+++ b/client/client.go
@@ -144,21 +144,23 @@ func (c *Client) Close() error {
 //
 // See also Init.
 type PrmInit struct {
-	disableFrostFSErrorResolution bool
+	DisableFrostFSErrorResolution bool
 
-	key ecdsa.PrivateKey
+	Key ecdsa.PrivateKey
 
-	cbRespInfo func(ResponseMetaInfo) error
+	ResponseInfoCallback func(ResponseMetaInfo) error
 
-	netMagic uint64
+	NetMagic uint64
 }
 
 // SetDefaultPrivateKey sets Client private key to be used for the protocol
 // communication by default.
 //
 // Required for operations without custom key parametrization (see corresponding Prm* docs).
+//
+// Deprecated: Use PrmInit.Key instead.
 func (x *PrmInit) SetDefaultPrivateKey(key ecdsa.PrivateKey) {
-	x.key = key
+	x.Key = key
 }
 
 // Deprecated: method is no-op. Option is default.
@@ -169,14 +171,18 @@ func (x *PrmInit) ResolveFrostFSFailures() {
 // FrostFS protocol only in resulting structure (see corresponding Res* docs).
 // These errors are returned from each protocol operation. By default, statuses
 // are resolved and returned as a Go built-in errors.
+//
+// Deprecated: Use PrmInit.DisableFrostFSErrorResolution instead.
 func (x *PrmInit) DisableFrostFSFailuresResolution() {
-	x.disableFrostFSErrorResolution = true
+	x.DisableFrostFSErrorResolution = true
 }
 
 // SetResponseInfoCallback makes the Client to pass ResponseMetaInfo from each
 // FrostFS server response to f. Nil (default) means ignore response meta info.
+//
+// Deprecated: Use PrmInit.ResponseInfoCallback instead.
 func (x *PrmInit) SetResponseInfoCallback(f func(ResponseMetaInfo) error) {
-	x.cbRespInfo = f
+	x.ResponseInfoCallback = f
 }
 
 // PrmDial groups connection parameters for the Client.
diff --git a/client/client_test.go b/client/client_test.go
index 16f66e2..1f05544 100644
--- a/client/client_test.go
+++ b/client/client_test.go
@@ -29,8 +29,9 @@ func assertStatusErr(tb testing.TB, res interface{ Status() apistatus.Status })
 }
 
 func newClient(server frostFSAPIServer) *Client {
-	var prm PrmInit
-	prm.SetDefaultPrivateKey(*key)
+	prm := PrmInit{
+		Key: *key,
+	}
 
 	var c Client
 	c.Init(prm)
diff --git a/client/common.go b/client/common.go
index 0df1806..c67084a 100644
--- a/client/common.go
+++ b/client/common.go
@@ -78,19 +78,19 @@ func (c *Client) prepareRequest(req request, meta *v2session.RequestMetaHeader)
 
 	meta.SetTTL(ttl)
 	meta.SetVersion(verV2)
-	meta.SetNetworkMagic(c.prm.netMagic)
+	meta.SetNetworkMagic(c.prm.NetMagic)
 
 	req.SetMetaHeader(meta)
 }
 
 // processResponse verifies response signature and converts status to an error if needed.
 func (c *Client) processResponse(resp responseV2) (apistatus.Status, error) {
-	if c.prm.cbRespInfo != nil {
+	if c.prm.ResponseInfoCallback != nil {
 		rmi := ResponseMetaInfo{
 			key:   resp.GetVerificationHeader().GetBodySignature().GetKey(),
 			epoch: resp.GetMetaHeader().GetEpoch(),
 		}
-		if err := c.prm.cbRespInfo(rmi); err != nil {
+		if err := c.prm.ResponseInfoCallback(rmi); err != nil {
 			return nil, fmt.Errorf("response callback error: %w", err)
 		}
 	}
@@ -101,7 +101,7 @@ func (c *Client) processResponse(resp responseV2) (apistatus.Status, error) {
 	}
 
 	st := apistatus.FromStatusV2(resp.GetMetaHeader().GetStatus())
-	if !c.prm.disableFrostFSErrorResolution {
+	if !c.prm.DisableFrostFSErrorResolution {
 		return st, apistatus.ErrFromStatus(st)
 	}
 	return st, nil
diff --git a/client/container_delete.go b/client/container_delete.go
index f750c90..6d4b345 100644
--- a/client/container_delete.go
+++ b/client/container_delete.go
@@ -52,7 +52,7 @@ func (prm *PrmContainerDelete) buildRequest(c *Client) (*v2container.DeleteReque
 
 	var sig frostfscrypto.Signature
 
-	err := sig.Calculate(frostfsecdsa.SignerRFC6979(c.prm.key), data)
+	err := sig.Calculate(frostfsecdsa.SignerRFC6979(c.prm.Key), data)
 	if err != nil {
 		return nil, fmt.Errorf("calculate signature: %w", err)
 	}
@@ -124,7 +124,7 @@ func (c *Client) ContainerDelete(ctx context.Context, prm PrmContainerDelete) (*
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
diff --git a/client/container_eacl.go b/client/container_eacl.go
index d577b7a..87d32d1 100644
--- a/client/container_eacl.go
+++ b/client/container_eacl.go
@@ -85,7 +85,7 @@ func (c *Client) ContainerEACL(ctx context.Context, prm PrmContainerEACL) (*ResC
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
diff --git a/client/container_get.go b/client/container_get.go
index 4477973..a6dd6f2 100644
--- a/client/container_get.go
+++ b/client/container_get.go
@@ -87,7 +87,7 @@ func (c *Client) ContainerGet(ctx context.Context, prm PrmContainerGet) (*ResCon
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
diff --git a/client/container_list.go b/client/container_list.go
index ebe27c3..0fb91c2 100644
--- a/client/container_list.go
+++ b/client/container_list.go
@@ -80,7 +80,7 @@ func (c *Client) ContainerList(ctx context.Context, prm PrmContainerList) (*ResC
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
diff --git a/client/container_put.go b/client/container_put.go
index 6ff4e5f..e5b8f18 100644
--- a/client/container_put.go
+++ b/client/container_put.go
@@ -64,7 +64,7 @@ func (x *PrmContainerPut) buildRequest(c *Client) (*v2container.PutRequest, erro
 
 	var sig frostfscrypto.Signature
 
-	err := container.CalculateSignature(&sig, *x.Container, c.prm.key)
+	err := container.CalculateSignature(&sig, *x.Container, c.prm.Key)
 	if err != nil {
 		return nil, fmt.Errorf("calculate container signature: %w", err)
 	}
@@ -132,7 +132,7 @@ func (c *Client) ContainerPut(ctx context.Context, prm PrmContainerPut) (*ResCon
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
diff --git a/client/container_set_eacl.go b/client/container_set_eacl.go
index 8ad808f..b149334 100644
--- a/client/container_set_eacl.go
+++ b/client/container_set_eacl.go
@@ -64,7 +64,7 @@ func (x *PrmContainerSetEACL) buildRequest(c *Client) (*v2container.SetExtendedA
 
 	var sig frostfscrypto.Signature
 
-	err := sig.Calculate(frostfsecdsa.SignerRFC6979(c.prm.key), eaclV2.StableMarshal(nil))
+	err := sig.Calculate(frostfsecdsa.SignerRFC6979(c.prm.Key), eaclV2.StableMarshal(nil))
 	if err != nil {
 		return nil, fmt.Errorf("calculate signature: %w", err)
 	}
@@ -121,7 +121,7 @@ func (c *Client) ContainerSetEACL(ctx context.Context, prm PrmContainerSetEACL)
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
diff --git a/client/container_space.go b/client/container_space.go
index 793f5f4..dda5acc 100644
--- a/client/container_space.go
+++ b/client/container_space.go
@@ -77,7 +77,7 @@ func (c *Client) ContainerAnnounceUsedSpace(ctx context.Context, prm PrmAnnounce
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
diff --git a/client/netmap.go b/client/netmap.go
index c06f940..f2c2e06 100644
--- a/client/netmap.go
+++ b/client/netmap.go
@@ -71,7 +71,7 @@ func (c *Client) EndpointInfo(ctx context.Context, prm PrmEndpointInfo) (*ResEnd
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
@@ -158,7 +158,7 @@ func (c *Client) NetworkInfo(ctx context.Context, prm PrmNetworkInfo) (*ResNetwo
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
@@ -228,7 +228,7 @@ func (c *Client) NetMapSnapshot(ctx context.Context, _ PrmNetMapSnapshot) (*ResN
 	req.SetBody(&body)
 	c.prepareRequest(&req, &meta)
 
-	err := signature.SignServiceMessage(&c.prm.key, &req)
+	err := signature.SignServiceMessage(&c.prm.Key, &req)
 	if err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
diff --git a/client/object_delete.go b/client/object_delete.go
index 3f72e0c..a9fe8e8 100644
--- a/client/object_delete.go
+++ b/client/object_delete.go
@@ -131,7 +131,7 @@ func (c *Client) ObjectDelete(ctx context.Context, prm PrmObjectDelete) (*ResObj
 		return nil, err
 	}
 
-	key := c.prm.key
+	key := c.prm.Key
 	if prm.Key != nil {
 		key = *prm.Key
 	}
diff --git a/client/object_get.go b/client/object_get.go
index 03b91d2..363c1ec 100644
--- a/client/object_get.go
+++ b/client/object_get.go
@@ -307,7 +307,7 @@ func (c *Client) ObjectGetInit(ctx context.Context, prm PrmObjectGet) (*ObjectRe
 
 	key := prm.Key
 	if key == nil {
-		key = &c.prm.key
+		key = &c.prm.Key
 	}
 
 	err = signature.SignServiceMessage(key, req)
@@ -468,7 +468,7 @@ func (c *Client) ObjectHead(ctx context.Context, prm PrmObjectHead) (*ResObjectH
 		return nil, err
 	}
 
-	key := c.prm.key
+	key := c.prm.Key
 	if prm.Key != nil {
 		key = *prm.Key
 	}
@@ -776,7 +776,7 @@ func (c *Client) ObjectRangeInit(ctx context.Context, prm PrmObjectRange) (*Obje
 
 	key := prm.Key
 	if key == nil {
-		key = &c.prm.key
+		key = &c.prm.Key
 	}
 
 	err = signature.SignServiceMessage(key, req)
diff --git a/client/object_hash.go b/client/object_hash.go
index e65e948..108e0ce 100644
--- a/client/object_hash.go
+++ b/client/object_hash.go
@@ -172,7 +172,7 @@ func (c *Client) ObjectHash(ctx context.Context, prm PrmObjectHash) (*ResObjectH
 		return nil, err
 	}
 
-	key := c.prm.key
+	key := c.prm.Key
 	if prm.Key != nil {
 		key = *prm.Key
 	}
diff --git a/client/object_put_raw.go b/client/object_put_raw.go
index 0669052..dd210a8 100644
--- a/client/object_put_raw.go
+++ b/client/object_put_raw.go
@@ -28,7 +28,7 @@ func (c *Client) objectPutInitRaw(ctx context.Context, prm PrmObjectPutInit) (*o
 		return nil, fmt.Errorf("open stream: %w", err)
 	}
 
-	w.key = &c.prm.key
+	w.key = &c.prm.Key
 	if prm.Key != nil {
 		w.key = prm.Key
 	}
diff --git a/client/object_put_single.go b/client/object_put_single.go
index 0ae6bf8..8eaeca9 100644
--- a/client/object_put_single.go
+++ b/client/object_put_single.go
@@ -142,7 +142,7 @@ func (c *Client) ObjectPutSingle(ctx context.Context, prm PrmObjectPutSingle) (*
 		return nil, err
 	}
 
-	key := &c.prm.key
+	key := &c.prm.Key
 	if prm.Key != nil {
 		key = prm.Key
 	}
diff --git a/client/object_put_transformer.go b/client/object_put_transformer.go
index 357e94f..c671b55 100644
--- a/client/object_put_transformer.go
+++ b/client/object_put_transformer.go
@@ -16,7 +16,7 @@ func (c *Client) objectPutInitTransformer(prm PrmObjectPutInit) (*objectWriterTr
 		client: c,
 		prm:    prm,
 	}
-	key := &c.prm.key
+	key := &c.prm.Key
 	if prm.Key != nil {
 		key = prm.Key
 	}
@@ -83,7 +83,7 @@ func (it *internalTarget) putAsStream(ctx context.Context, o *object.Object) err
 		wrt.WritePayloadChunk(ctx, o.Payload())
 	}
 	it.res, err = wrt.Close(ctx)
-	if err == nil && it.client.prm.disableFrostFSErrorResolution && !apistatus.IsSuccessful(it.res.st) {
+	if err == nil && it.client.prm.DisableFrostFSErrorResolution && !apistatus.IsSuccessful(it.res.st) {
 		err = apistatus.ErrFromStatus(it.res.st)
 	}
 	return err
@@ -115,7 +115,7 @@ func (it *internalTarget) tryPutSingle(ctx context.Context, o *object.Object) (b
 			statusRes: res.statusRes,
 			obj:       id,
 		}
-		if it.client.prm.disableFrostFSErrorResolution && !apistatus.IsSuccessful(it.res.st) {
+		if it.client.prm.DisableFrostFSErrorResolution && !apistatus.IsSuccessful(it.res.st) {
 			return true, apistatus.ErrFromStatus(it.res.st)
 		}
 		return true, nil
diff --git a/client/object_search.go b/client/object_search.go
index 760a6d0..aa02542 100644
--- a/client/object_search.go
+++ b/client/object_search.go
@@ -284,7 +284,7 @@ func (c *Client) ObjectSearchInit(ctx context.Context, prm PrmObjectSearch) (*Ob
 
 	key := prm.Key
 	if key == nil {
-		key = &c.prm.key
+		key = &c.prm.Key
 	}
 
 	err = signature.SignServiceMessage(key, req)
diff --git a/client/session.go b/client/session.go
index 03ed5e8..b49c67b 100644
--- a/client/session.go
+++ b/client/session.go
@@ -39,7 +39,7 @@ func (x *PrmSessionCreate) UseKey(key ecdsa.PrivateKey) {
 }
 
 func (x *PrmSessionCreate) buildRequest(c *Client) (*v2session.CreateRequest, error) {
-	ownerKey := c.prm.key.PublicKey
+	ownerKey := c.prm.Key.PublicKey
 	if x.Key != nil {
 		ownerKey = x.Key.PublicKey
 	}
@@ -104,7 +104,7 @@ func (c *Client) SessionCreate(ctx context.Context, prm PrmSessionCreate) (*ResS
 		return nil, err
 	}
 
-	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
+	if err := signature.SignServiceMessage(&c.prm.Key, req); err != nil {
 		return nil, fmt.Errorf("sign request: %w", err)
 	}
 
diff --git a/pool/pool.go b/pool/pool.go
index c871689..da8f099 100644
--- a/pool/pool.go
+++ b/pool/pool.go
@@ -316,9 +316,10 @@ func (x *wrapperPrm) setGRPCDialOptions(opts []grpc.DialOption) {
 // newWrapper creates a clientWrapper that implements the client interface.
 func newWrapper(prm wrapperPrm) *clientWrapper {
 	var cl sdkClient.Client
-	var prmInit sdkClient.PrmInit
-	prmInit.SetDefaultPrivateKey(prm.key)
-	prmInit.SetResponseInfoCallback(prm.responseInfoCallback)
+	prmInit := sdkClient.PrmInit{
+		Key:                  prm.key,
+		ResponseInfoCallback: prm.responseInfoCallback,
+	}
 
 	cl.Init(prmInit)
 
@@ -371,9 +372,10 @@ func (c *clientWrapper) restartIfUnhealthy(ctx context.Context) (healthy, change
 	}
 
 	var cl sdkClient.Client
-	var prmInit sdkClient.PrmInit
-	prmInit.SetDefaultPrivateKey(c.prm.key)
-	prmInit.SetResponseInfoCallback(c.prm.responseInfoCallback)
+	prmInit := sdkClient.PrmInit{
+		Key:                  c.prm.key,
+		ResponseInfoCallback: c.prm.responseInfoCallback,
+	}
 
 	cl.Init(prmInit)