diff --git a/api/broker/client_streams.go b/api/broker/client_streams.go
index fba01e29f..dc9272924 100644
--- a/api/broker/client_streams.go
+++ b/api/broker/client_streams.go
@@ -84,6 +84,13 @@ func NewMonitoredRouterStream(client BrokerClient, getContextFunc func() context
 					message, err := client.Recv()
 					if message != nil {
 						s.ctx.Debug("Receiving Downlink message")
+						if err := message.Validate(); err != nil {
+							s.ctx.WithError(err).Warn("Invalid Downlink")
+							continue
+						}
+						if err := message.UnmarshalPayload(); err != nil {
+							s.ctx.Warn("Could not unmarshal Downlink payload")
+						}
 						select {
 						case s.down <- message:
 						default:
@@ -345,6 +352,13 @@ func NewMonitoredHandlerSubscribeStream(client BrokerClient, getContextFunc func
 				message, err = client.Recv()
 				if message != nil {
 					s.ctx.Debug("Receiving Uplink message")
+					if err := message.Validate(); err != nil {
+						s.ctx.WithError(err).Warn("Invalid Uplink")
+						continue
+					}
+					if err := message.UnmarshalPayload(); err != nil {
+						s.ctx.Warn("Could not unmarshal Uplink payload")
+					}
 					select {
 					case s.ch <- message:
 					default:
diff --git a/api/broker/server_streams.go b/api/broker/server_streams.go
index da81b4b8c..55ece9fe1 100644
--- a/api/broker/server_streams.go
+++ b/api/broker/server_streams.go
@@ -8,7 +8,6 @@ import (
 
 	"github.com/TheThingsNetwork/go-utils/log"
 	"github.com/TheThingsNetwork/ttn/api"
-	"github.com/TheThingsNetwork/ttn/utils/errors"
 	"github.com/golang/protobuf/ptypes/empty"
 	"google.golang.org/grpc/metadata"
 )
@@ -70,7 +69,11 @@ func (s *BrokerStreamServer) Associate(stream Broker_AssociateServer) (err error
 				return err
 			}
 			if err := uplink.Validate(); err != nil {
-				return errors.Wrap(err, "Invalid Uplink")
+				s.ctx.WithError(err).Warn("Invalid Uplink")
+				continue
+			}
+			if err := uplink.UnmarshalPayload(); err != nil {
+				s.ctx.Warn("Could not unmarshal uplink payload")
 			}
 			upChan <- uplink
 		}
@@ -139,7 +142,11 @@ func (s *BrokerStreamServer) Publish(stream Broker_PublishServer) error {
 			return err
 		}
 		if err := downlink.Validate(); err != nil {
-			return errors.Wrap(err, "Invalid Downlink")
+			s.ctx.WithError(err).Warn("Invalid Downlink")
+			continue
+		}
+		if err := downlink.UnmarshalPayload(); err != nil {
+			s.ctx.Warn("Could not unmarshal downlink payload")
 		}
 		ch <- downlink
 	}
diff --git a/api/message_marshaling.go b/api/message_marshaling.go
new file mode 100644
index 000000000..95e651872
--- /dev/null
+++ b/api/message_marshaling.go
@@ -0,0 +1,9 @@
+// Copyright © 2017 The Things Network
+// Use of this source code is governed by the MIT license that can be found in the LICENSE file.
+
+package api
+
+// PayloadUnmarshaler unmarshals the Payload to a Message
+type PayloadUnmarshaler interface {
+	UnmarshalPayload() error
+}
diff --git a/api/router/client_streams.go b/api/router/client_streams.go
index 1b8b1b620..e417ccc7b 100644
--- a/api/router/client_streams.go
+++ b/api/router/client_streams.go
@@ -333,6 +333,13 @@ func NewMonitoredDownlinkStream(client RouterClientForGateway) DownlinkStream {
 				message, err = client.Recv()
 				if message != nil {
 					s.ctx.Debug("Receiving Downlink message")
+					if err := message.Validate(); err != nil {
+						s.ctx.WithError(err).Warn("Invalid Downlink")
+						continue
+					}
+					if err := message.UnmarshalPayload(); err != nil {
+						s.ctx.Warn("Could not unmarshal Downlink payload")
+					}
 					select {
 					case s.ch <- message:
 					default:
diff --git a/api/router/server_streams.go b/api/router/server_streams.go
index 67794ee27..2f6b8ec2c 100644
--- a/api/router/server_streams.go
+++ b/api/router/server_streams.go
@@ -61,7 +61,11 @@ func (s *RouterStreamServer) Uplink(stream Router_UplinkServer) (err error) {
 			return err
 		}
 		if err := uplink.Validate(); err != nil {
-			return errors.Wrap(err, "Invalid Uplink")
+			s.ctx.WithError(err).Warn("Invalid Uplink")
+			continue
+		}
+		if err := uplink.UnmarshalPayload(); err != nil {
+			s.ctx.Warn("Could not unmarshal Uplink payload")
 		}
 		ch <- uplink
 	}