diff --git a/backend/rpc.go b/backend/rpc.go
index b456553..af603ca 100644
--- a/backend/rpc.go
+++ b/backend/rpc.go
@@ -149,6 +149,26 @@ func (s *RpcServer) RejectInboundRequest(ctx context.Context, req *rpc.ContactRe
 	return nil, NotImplementedError
 }
 
-func (s *RpcServer) StreamConversations(stream rpc.RicochetCore_StreamConversationsServer) error {
-	return NotImplementedError
+func (s *RpcServer) MonitorConversations(req *rpc.MonitorConversationsRequest, stream rpc.RicochetCore_MonitorConversationsServer) error {
+	monitor := ricochet.ConversationEventMonitor().Subscribe(100)
+	defer ricochet.ConversationEventMonitor().Unsubscribe(monitor)
+
+	// XXX should populate
+
+	for {
+		event, ok := (<-monitor).(rpc.ConversationEvent)
+		if !ok {
+			break
+		}
+
+		if err := stream.Send(&event); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *RpcServer) SendMessage(ctx context.Context, req *rpc.Message) (*rpc.Message, error) {
+	return nil, NotImplementedError
 }
diff --git a/core/contact.go b/core/contact.go
index 8827929..371c887 100644
--- a/core/contact.go
+++ b/core/contact.go
@@ -29,6 +29,8 @@ type Contact struct {
 	connection        *protocol.OpenConnection
 	connChannel       chan *protocol.OpenConnection
 	connClosedChannel chan struct{}
+
+	conversation *Conversation
 }
 
 func ContactFromConfig(core *Ricochet, id int, data ConfigContact, events *utils.Publisher) (*Contact, error) {
@@ -110,6 +112,19 @@ func (c *Contact) Data() *ricochet.Contact {
 	return data
 }
 
+func (c *Contact) Conversation() *Conversation {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+	if c.conversation == nil {
+		entity := &ricochet.Entity{
+			ContactId: int32(c.id),
+			Address:   "ricochet:" + c.data.Hostname[0:16],
+		}
+		c.conversation = NewConversation(c.core, c, entity)
+	}
+	return c.conversation
+}
+
 // Goroutine to handle the protocol connection for a contact.
 // Responsible for making outbound connections and taking over authenticated
 // inbound connections, running protocol handlers on the active connection, and
diff --git a/core/conversation.go b/core/conversation.go
new file mode 100644
index 0000000..8fb14fb
--- /dev/null
+++ b/core/conversation.go
@@ -0,0 +1,113 @@
+package core
+
+import (
+	"github.com/special/notricochet/core/utils"
+	"github.com/special/notricochet/rpc"
+	"log"
+	"sync"
+	"time"
+)
+
+// XXX threading model.. this one isn't great
+
+// XXX Should probably be under core or identity
+var conversationStream *utils.Publisher = utils.CreatePublisher()
+
+type Conversation struct {
+	Core    *Ricochet
+	Contact *Contact
+
+	mutex sync.Mutex
+
+	localEntity  *ricochet.Entity
+	remoteEntity *ricochet.Entity
+	messages     []*ricochet.Message
+}
+
+func NewConversation(core *Ricochet, contact *Contact, remoteEntity *ricochet.Entity) *Conversation {
+	return &Conversation{
+		Core:         core,
+		Contact:      contact,
+		localEntity:  &ricochet.Entity{IsSelf: true},
+		remoteEntity: remoteEntity,
+		messages:     make([]*ricochet.Message, 0),
+	}
+}
+
+func ConversationEventMonitor() utils.Subscribable {
+	return conversationStream
+}
+
+func (c *Conversation) Receive(id uint64, timestamp int64, text string) {
+	message := &ricochet.Message{
+		Sender:     c.remoteEntity,
+		Recipient:  c.localEntity,
+		Timestamp:  timestamp,
+		Identifier: id,
+		Status:     ricochet.Message_RECEIVED,
+		Text:       text,
+	}
+	// XXX container
+	// XXX limit backlog/etc
+	c.mutex.Lock()
+	c.messages = append(c.messages, message)
+	log.Printf("Conversation received message: %v", message)
+	c.mutex.Unlock()
+
+	// XXX Technically these aren't guaranteed to be in order (because
+	// the lock has been released) or to all arrive (because of publisher's
+	// dropping behavior)...
+	event := ricochet.ConversationEvent{
+		Type: ricochet.ConversationEvent_RECEIVE,
+		Msg:  message,
+	}
+	conversationStream.Publish(event)
+}
+
+func (c *Conversation) UpdateSentStatus(id uint64, success bool) {
+	c.mutex.Lock()
+	for _, message := range c.messages {
+		if message.Status != ricochet.Message_SENDING || message.Identifier != id {
+			continue
+		}
+
+		if success {
+			message.Status = ricochet.Message_DELIVERED
+		} else {
+			message.Status = ricochet.Message_ERROR
+		}
+
+		c.mutex.Unlock()
+		event := ricochet.ConversationEvent{
+			Type: ricochet.ConversationEvent_UPDATE,
+			Msg:  message,
+		}
+		conversationStream.Publish(event)
+		return
+	}
+	c.mutex.Unlock()
+}
+
+func (c *Conversation) Send(text string) {
+	// XXX protocol
+	// XXX check that text is ok, get identifier, etc
+	// XXX decide whether sending or queued based on state
+	message := &ricochet.Message{
+		Sender:     c.localEntity,
+		Recipient:  c.remoteEntity,
+		Timestamp:  time.Now().Unix(),
+		Identifier: 0,                        // XXX
+		Status:     ricochet.Message_SENDING, // XXX
+		Text:       text,
+	}
+	c.mutex.Lock()
+	c.messages = append(c.messages, message)
+	log.Printf("Conversation sent message: %v", message)
+	c.mutex.Unlock()
+
+	event := ricochet.ConversationEvent{
+		Type: ricochet.ConversationEvent_SEND,
+		Msg:  message,
+	}
+	conversationStream.Publish(event)
+}
diff --git a/core/protocol.go b/core/protocol.go
index 58ed1cd..4b33787 100644
--- a/core/protocol.go
+++ b/core/protocol.go
@@ -5,6 +5,7 @@ import (
 	protocol "github.com/s-rah/go-ricochet"
 	"log"
 	"net"
+	"time"
 )
 
 type Protocol struct {
@@ -150,22 +151,48 @@ func (handler *protocolHandler) OnContactRequestAck(oc *protocol.OpenConnection,
 
 // Managing Channels
 func (handler *protocolHandler) OnOpenChannelRequest(oc *protocol.OpenConnection, channelID int32, channelType string) {
+	log.Printf("open channel request: %v %v", channelID, channelType)
 	oc.AckOpenChannel(channelID, channelType)
 }
 
 func (handler *protocolHandler) OnOpenChannelRequestSuccess(oc *protocol.OpenConnection, channelID int32) {
+	log.Printf("open channel request success: %v %v", channelID)
 }
 func (handler *protocolHandler) OnChannelClosed(oc *protocol.OpenConnection, channelID int32) {
+	log.Printf("channel closed: %v", channelID)
 }
 
 // Chat Messages
+// XXX messageID should be (at least) uint32
 func (handler *protocolHandler) OnChatMessage(oc *protocol.OpenConnection, channelID int32, messageID int32, message string) {
+	// XXX no time delta?
+	// XXX sanity checks, message contents, etc
+	log.Printf("chat message: %d %d %s", channelID, messageID, message)
+
+	// XXX ugllly
+	contact := handler.p.core.Identity.ContactList().ContactByAddress("ricochet:" + oc.OtherHostname)
+	if contact != nil {
+		conversation := contact.Conversation()
+		conversation.Receive(uint64(messageID), time.Now().Unix(), message)
+	}
+
+	oc.AckChatMessage(channelID, messageID)
 }
 func (handler *protocolHandler) OnChatMessageAck(oc *protocol.OpenConnection, channelID int32, messageID int32) {
+	// XXX no success
+	log.Printf("chat ack: %d %d", channelID, messageID)
+
+	// XXX Also ugly
+	contact := handler.p.core.Identity.ContactList().ContactByAddress("ricochet:" + oc.OtherHostname)
+	if contact != nil {
+		conversation := contact.Conversation()
+		conversation.UpdateSentStatus(uint64(messageID), true)
+	}
 }
 
 // Handle Errors
 func (handler *protocolHandler) OnFailedChannelOpen(oc *protocol.OpenConnection, channelID int32, errorType string) {
+	log.Printf("failed channel open: %d %s", channelID, errorType)
 	oc.UnsetChannel(channelID)
 }
 func (handler *protocolHandler) OnGenericError(oc *protocol.OpenConnection, channelID int32) {
diff --git a/rpc/config.pb.go b/rpc/config.pb.go
index 8bfda76..bdfcd13 100644
--- a/rpc/config.pb.go
+++ b/rpc/config.pb.go
@@ -25,6 +25,7 @@ It has these top-level messages:
 	DeleteContactReply
 	RejectInboundRequestReply
 	ConversationEvent
+	MonitorConversationsRequest
 	Entity
 	Message
 	ServerStatusRequest
diff --git a/rpc/conversation.pb.go b/rpc/conversation.pb.go
index 2131c0e..19181e8 100644
--- a/rpc/conversation.pb.go
+++ b/rpc/conversation.pb.go
@@ -74,7 +74,7 @@ var Message_Status_value = map[string]int32{
 func (x Message_Status) String() string {
 	return proto.EnumName(Message_Status_name, int32(x))
 }
-func (Message_Status) EnumDescriptor() ([]byte, []int) { return fileDescriptor2, []int{2, 0} }
+func (Message_Status) EnumDescriptor() ([]byte, []int) { return fileDescriptor2, []int{3, 0} }
 
 type ConversationEvent struct {
 	Type ConversationEvent_Type `protobuf:"varint,1,opt,name=type,enum=ricochet.ConversationEvent_Type" json:"type,omitempty"`
@@ -93,24 +93,34 @@ func (m *ConversationEvent) GetMsg() *Message {
 	return nil
 }
 
+type MonitorConversationsRequest struct {
+}
+
+func (m *MonitorConversationsRequest) Reset()                    { *m = MonitorConversationsRequest{} }
+func (m *MonitorConversationsRequest) String() string            { return proto.CompactTextString(m) }
+func (*MonitorConversationsRequest) ProtoMessage()               {}
+func (*MonitorConversationsRequest) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{1} }
+
 type Entity struct {
-	// null is self
+	// contactId and address MAY be unspecified for self
 	ContactId int32  `protobuf:"varint,1,opt,name=contactId" json:"contactId,omitempty"`
 	Address   string `protobuf:"bytes,2,opt,name=address" json:"address,omitempty"`
+	IsSelf    bool   `protobuf:"varint,3,opt,name=isSelf" json:"isSelf,omitempty"`
 }
 
 func (m *Entity) Reset()                    { *m = Entity{} }
 func (m *Entity) String() string            { return proto.CompactTextString(m) }
 func (*Entity) ProtoMessage()               {}
-func (*Entity) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{1} }
+func (*Entity) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{2} }
 
 type Message struct {
 	Sender    *Entity `protobuf:"bytes,1,opt,name=sender" json:"sender,omitempty"`
 	Recipient *Entity `protobuf:"bytes,2,opt,name=recipient" json:"recipient,omitempty"`
 	Timestamp int64   `protobuf:"varint,3,opt,name=timestamp" json:"timestamp,omitempty"`
-	// Identifiers are unique _only_ to a sender/recipient pair in a session
-	// XXX This is a silly thing to perpetuate; should we UUID?
-	Identifier uint32         `protobuf:"varint,4,opt,name=identifier" json:"identifier,omitempty"`
+	// Identifiers are unique for the tuple of (sender, recipient, direction)
+	// within a single session, and should be randomized between sessions to
+	// reduce the chance of collision.
+	Identifier uint64         `protobuf:"varint,4,opt,name=identifier" json:"identifier,omitempty"`
 	Status     Message_Status `protobuf:"varint,5,opt,name=status,enum=ricochet.Message_Status" json:"status,omitempty"`
 	Text       string         `protobuf:"bytes,6,opt,name=text" json:"text,omitempty"`
 }
@@ -118,7 +128,7 @@ type Message struct {
 func (m *Message) Reset()                    { *m = Message{} }
 func (m *Message) String() string            { return proto.CompactTextString(m) }
 func (*Message) ProtoMessage()               {}
-func (*Message) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{2} }
+func (*Message) Descriptor() ([]byte, []int) { return fileDescriptor2, []int{3} }
 
 func (m *Message) GetSender() *Entity {
 	if m != nil {
@@ -136,6 +146,7 @@ func (m *Message) GetRecipient() *Entity {
 
 func init() {
 	proto.RegisterType((*ConversationEvent)(nil), "ricochet.ConversationEvent")
+	proto.RegisterType((*MonitorConversationsRequest)(nil), "ricochet.MonitorConversationsRequest")
 	proto.RegisterType((*Entity)(nil), "ricochet.Entity")
 	proto.RegisterType((*Message)(nil), "ricochet.Message")
 	proto.RegisterEnum("ricochet.ConversationEvent_Type", ConversationEvent_Type_name, ConversationEvent_Type_value)
@@ -145,29 +156,31 @@ func init() {
 func init() { proto.RegisterFile("conversation.proto", fileDescriptor2) }
 
 var fileDescriptor2 = []byte{
-	// 378 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x64, 0x92, 0x4d, 0xef, 0xd2, 0x40,
-	0x10, 0xc6, 0xed, 0x2b, 0x74, 0x10, 0x53, 0xe6, 0xd4, 0x83, 0x31, 0xa4, 0x5e, 0x38, 0x35, 0x06,
-	0xfd, 0x00, 0x12, 0xba, 0x31, 0x24, 0x15, 0x70, 0xa1, 0xde, 0x6b, 0xbb, 0xe2, 0x1e, 0x68, 0x9b,
-	0x76, 0x25, 0xf2, 0xb1, 0xbc, 0xfb, 0xe1, 0x9c, 0x2e, 0x25, 0xe5, 0x1f, 0x6e, 0xdb, 0x79, 0x7e,
-	0xd3, 0x79, 0xe6, 0xd9, 0x05, 0xcc, 0xab, 0xf2, 0x22, 0x9a, 0x36, 0x53, 0xb2, 0x2a, 0xa3, 0xba,
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-	0xc0, 0x2e, 0xa2, 0x54, 0xf8, 0x09, 0x6c, 0x75, 0xad, 0x45, 0x60, 0xcc, 0x8d, 0xc5, 0x9b, 0xe5,
-	0x3c, 0xba, 0xe3, 0xd1, 0x13, 0x1a, 0x1d, 0x89, 0xe3, 0x9a, 0xc6, 0xf7, 0x60, 0x9d, 0xdb, 0x53,
-	0x60, 0x52, 0xd3, 0x64, 0x39, 0x1b, 0x9a, 0xbe, 0x8a, 0xb6, 0xcd, 0x4e, 0x82, 0x77, 0x6a, 0xb8,
-	0x02, 0xbb, 0x6b, 0xc1, 0x31, 0xd8, 0xdb, 0x34, 0x49, 0xfc, 0x57, 0xf8, 0x1a, 0xc6, 0xfb, 0xdd,
-	0x3e, 0x4d, 0x56, 0x47, 0xe6, 0x1b, 0x38, 0x81, 0x11, 0x67, 0x6b, 0xb6, 0xf9, 0xce, 0x7c, 0xb3,
-	0x83, 0x0e, 0x6c, 0x1b, 0xfb, 0x16, 0x02, 0xb8, 0xe9, 0x3e, 0xee, 0x10, 0x3b, 0xfc, 0x0c, 0x2e,
-	0x2b, 0x95, 0x54, 0x57, 0x7c, 0x0b, 0x1e, 0x6d, 0xa7, 0xb2, 0x5c, 0x6d, 0x0a, 0x6d, 0xd6, 0xe1,
-	0x43, 0x01, 0x03, 0x18, 0x65, 0x45, 0xd1, 0xd0, 0x74, 0xed, 0xc9, 0xe3, 0xf7, 0xcf, 0xf0, 0x9f,
-	0x09, 0xa3, 0xde, 0x15, 0x2e, 0xc0, 0x6d, 0x45, 0x59, 0x88, 0x46, 0xff, 0x60, 0xb2, 0xf4, 0x07,
-	0xe3, 0xb7, 0x29, 0xbc, 0xd7, 0x31, 0x02, 0xaf, 0x11, 0xb9, 0xac, 0x25, 0xed, 0xdd, 0x6f, 0xf9,
-	0x0c, 0x0f, 0x48, 0xe7, 0x4e, 0xc9, 0xb3, 0x68, 0x55, 0x76, 0xae, 0x03, 0x8b, 0x78, 0x8b, 0x0f,
-	0x05, 0x7c, 0x07, 0x20, 0x0b, 0xc2, 0xe4, 0x4f, 0x49, 0xb3, 0x6d, 0x92, 0xa7, 0xfc, 0xa1, 0x82,
-	0x1f, 0xc8, 0x97, 0xca, 0xd4, 0xef, 0x36, 0x70, 0xf4, 0x2d, 0x04, 0x4f, 0x81, 0x46, 0x07, 0xad,
-	0xf3, 0x9e, 0x43, 0xa4, 0x5b, 0x13, 0x7f, 0x54, 0xe0, 0xea, 0x65, 0xf5, 0x39, 0x3c, 0x80, 0x7b,
-	0xa3, 0x5e, 0x06, 0xde, 0x47, 0x1c, 0x53, 0xe0, 0x94, 0xec, 0xb7, 0x94, 0xa5, 0x74, 0x36, 0xbb,
-	0xf0, 0xbb, 0xbc, 0x37, 0xdb, 0x2f, 0x14, 0xf9, 0x14, 0xbc, 0x98, 0x25, 0x44, 0x71, 0xd2, 0x6c,
-	0xf4, 0xc0, 0x61, 0x9c, 0xef, 0xb8, 0xef, 0xfc, 0x70, 0xf5, 0x2b, 0xfa, 0xf8, 0x3f, 0x00, 0x00,
-	0xff, 0xff, 0xe1, 0x5b, 0xde, 0x0a, 0x5b, 0x02, 0x00, 0x00,
+	// 413 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x64, 0x92, 0xcf, 0x6e, 0xd3, 0x40,
+	0x10, 0xc6, 0xf1, 0xdf, 0xd8, 0x13, 0x40, 0xee, 0x1c, 0x90, 0x25, 0xfe, 0xa8, 0x32, 0x97, 0x9e,
+	0x2c, 0x14, 0x78, 0x81, 0xaa, 0x5e, 0xa1, 0x48, 0x6e, 0x1a, 0xd6, 0x35, 0xe2, 0x6a, 0xec, 0x6d,
+	0x59, 0x89, 0xd8, 0xc6, 0xbb, 0xad, 0xe8, 0x63, 0x71, 0xe7, 0xe1, 0x18, 0x6f, 0x1c, 0x39, 0x28,
+	0xb7, 0xdd, 0xf9, 0x7e, 0xe3, 0xfd, 0x66, 0x3e, 0x03, 0xd6, 0x5d, 0xfb, 0x28, 0x06, 0x55, 0x69,
+	0xd9, 0xb5, 0x69, 0x3f, 0x74, 0xba, 0xc3, 0x60, 0x90, 0x75, 0x57, 0xff, 0x10, 0x3a, 0xf9, 0x63,
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+	0xb6, 0xfe, 0xca, 0x22, 0x7b, 0x84, 0x0a, 0xb6, 0xc9, 0x22, 0x07, 0x01, 0xfc, 0x72, 0x9b, 0x8d,
+	0x88, 0x9b, 0xbc, 0x85, 0xd7, 0xd7, 0x5d, 0x2b, 0x75, 0x37, 0x1c, 0xdb, 0x51, 0x5c, 0xfc, 0x7a,
+	0x10, 0x4a, 0x27, 0xdf, 0xc0, 0x67, 0xad, 0x96, 0xfa, 0x09, 0xdf, 0x40, 0x48, 0xc3, 0xeb, 0xaa,
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+	0x1c, 0xf2, 0xc3, 0x15, 0x5f, 0x81, 0x2f, 0x55, 0x21, 0x7e, 0xde, 0xc5, 0x0e, 0x09, 0x01, 0x9f,
+	0x6e, 0xc9, 0x5f, 0x1b, 0x16, 0xd3, 0x30, 0x78, 0x01, 0xbe, 0x12, 0x6d, 0x23, 0x06, 0xf3, 0xe1,
+	0xe5, 0x2a, 0x9a, 0xe7, 0xdd, 0xbf, 0xce, 0x27, 0x1d, 0x53, 0x08, 0x07, 0x51, 0xcb, 0x5e, 0xd2,
+	0xba, 0xa6, 0xe5, 0x9c, 0xc2, 0x33, 0x32, 0xba, 0xd6, 0x72, 0x47, 0x93, 0x54, 0xbb, 0xde, 0x18,
+	0x70, 0xf8, 0x5c, 0xc0, 0x77, 0x00, 0xb2, 0x21, 0x4c, 0xde, 0x49, 0x7a, 0xdb, 0x25, 0xd9, 0xe5,
+	0x47, 0x15, 0xfc, 0x40, 0xbe, 0x74, 0xa5, 0x1f, 0x54, 0xec, 0x99, 0xf0, 0xe2, 0x93, 0x1c, 0xd2,
+	0xc2, 0xe8, 0x7c, 0xe2, 0x10, 0x29, 0x6c, 0xf1, 0x5b, 0xc7, 0xbe, 0x59, 0x82, 0x39, 0x27, 0x05,
+	0xf8, 0x7b, 0xea, 0xff, 0x9c, 0xa6, 0x64, 0x32, 0xca, 0x89, 0x02, 0xf9, 0x52, 0xb2, 0x92, 0xce,
+	0xf6, 0x98, 0xd9, 0x18, 0xd3, 0x7a, 0xf3, 0x99, 0x92, 0x7a, 0x01, 0x61, 0xc6, 0x72, 0xa2, 0x38,
+	0x69, 0x2e, 0x86, 0xe0, 0x31, 0xce, 0x6f, 0x78, 0xe4, 0x7d, 0xf7, 0xcd, 0xcf, 0xf7, 0xf1, 0x5f,
+	0x00, 0x00, 0x00, 0xff, 0xff, 0x58, 0x7a, 0x99, 0xbe, 0x92, 0x02, 0x00, 0x00,
 }
diff --git a/rpc/conversation.proto b/rpc/conversation.proto
index a256c9f..a26cff6 100644
--- a/rpc/conversation.proto
+++ b/rpc/conversation.proto
@@ -14,19 +14,24 @@ message ConversationEvent {
     Message msg = 2;
 }
 
+message MonitorConversationsRequest {
+}
+
 message Entity {
-    // null is self
+    // contactId and address MAY be unspecified for self
     int32 contactId = 1;
     string address = 2;
+    bool isSelf = 3;
 }
 
 message Message {
     Entity sender = 1;
     Entity recipient = 2;
     int64 timestamp = 3;
-    // Identifiers are unique _only_ to a sender/recipient pair in a session
-    // XXX This is a silly thing to perpetuate; should we UUID?
-    uint32 identifier = 4;
+    // Identifiers are unique for the tuple of (sender, recipient, direction)
+    // within a single session, and should be randomized between sessions to
+    // reduce the chance of collision.
+    uint64 identifier = 4;
 
     enum Status {
         NULL = 0;
diff --git a/rpc/core.pb.go b/rpc/core.pb.go
index e4687de..46e9bee 100644
--- a/rpc/core.pb.go
+++ b/rpc/core.pb.go
@@ -82,7 +82,9 @@ type RicochetCoreClient interface {
 	DeleteContact(ctx context.Context, in *DeleteContactRequest, opts ...grpc.CallOption) (*DeleteContactReply, error)
 	AcceptInboundRequest(ctx context.Context, in *ContactRequest, opts ...grpc.CallOption) (*Contact, error)
 	RejectInboundRequest(ctx context.Context, in *ContactRequest, opts ...grpc.CallOption) (*RejectInboundRequestReply, error)
-	StreamConversations(ctx context.Context, opts ...grpc.CallOption) (RicochetCore_StreamConversationsClient, error)
+	// Open a stream to monitor messages in conversations with contacts.
+	MonitorConversations(ctx context.Context, in *MonitorConversationsRequest, opts ...grpc.CallOption) (RicochetCore_MonitorConversationsClient, error)
+	SendMessage(ctx context.Context, in *Message, opts ...grpc.CallOption) (*Message, error)
 }
 
 type ricochetCoreClient struct {
@@ -238,30 +240,31 @@ func (c *ricochetCoreClient) RejectInboundRequest(ctx context.Context, in *Conta
 	return out, nil
 }
 
-func (c *ricochetCoreClient) StreamConversations(ctx context.Context, opts ...grpc.CallOption) (RicochetCore_StreamConversationsClient, error) {
-	stream, err := grpc.NewClientStream(ctx, &_RicochetCore_serviceDesc.Streams[2], c.cc, "/ricochet.RicochetCore/StreamConversations", opts...)
+func (c *ricochetCoreClient) MonitorConversations(ctx context.Context, in *MonitorConversationsRequest, opts ...grpc.CallOption) (RicochetCore_MonitorConversationsClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_RicochetCore_serviceDesc.Streams[2], c.cc, "/ricochet.RicochetCore/MonitorConversations", opts...)
 	if err != nil {
 		return nil, err
 	}
-	x := &ricochetCoreStreamConversationsClient{stream}
+	x := &ricochetCoreMonitorConversationsClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
 	return x, nil
 }
 
-type RicochetCore_StreamConversationsClient interface {
-	Send(*ConversationEvent) error
+type RicochetCore_MonitorConversationsClient interface {
 	Recv() (*ConversationEvent, error)
 	grpc.ClientStream
 }
 
-type ricochetCoreStreamConversationsClient struct {
+type ricochetCoreMonitorConversationsClient struct {
 	grpc.ClientStream
 }
 
-func (x *ricochetCoreStreamConversationsClient) Send(m *ConversationEvent) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *ricochetCoreStreamConversationsClient) Recv() (*ConversationEvent, error) {
+func (x *ricochetCoreMonitorConversationsClient) Recv() (*ConversationEvent, error) {
 	m := new(ConversationEvent)
 	if err := x.ClientStream.RecvMsg(m); err != nil {
 		return nil, err
@@ -269,6 +272,15 @@ func (x *ricochetCoreStreamConversationsClient) Recv() (*ConversationEvent, erro
 	return m, nil
 }
 
+func (c *ricochetCoreClient) SendMessage(ctx context.Context, in *Message, opts ...grpc.CallOption) (*Message, error) {
+	out := new(Message)
+	err := grpc.Invoke(ctx, "/ricochet.RicochetCore/SendMessage", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // Server API for RicochetCore service
 
 type RicochetCoreServer interface {
@@ -301,7 +313,9 @@ type RicochetCoreServer interface {
 	DeleteContact(context.Context, *DeleteContactRequest) (*DeleteContactReply, error)
 	AcceptInboundRequest(context.Context, *ContactRequest) (*Contact, error)
 	RejectInboundRequest(context.Context, *ContactRequest) (*RejectInboundRequestReply, error)
-	StreamConversations(RicochetCore_StreamConversationsServer) error
+	// Open a stream to monitor messages in conversations with contacts.
+	MonitorConversations(*MonitorConversationsRequest, RicochetCore_MonitorConversationsServer) error
+	SendMessage(context.Context, *Message) (*Message, error)
 }
 
 func RegisterRicochetCoreServer(s *grpc.Server, srv RicochetCoreServer) {
@@ -512,30 +526,43 @@ func _RicochetCore_RejectInboundRequest_Handler(srv interface{}, ctx context.Con
 	return interceptor(ctx, in, info, handler)
 }
 
-func _RicochetCore_StreamConversations_Handler(srv interface{}, stream grpc.ServerStream) error {
-	return srv.(RicochetCoreServer).StreamConversations(&ricochetCoreStreamConversationsServer{stream})
+func _RicochetCore_MonitorConversations_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(MonitorConversationsRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(RicochetCoreServer).MonitorConversations(m, &ricochetCoreMonitorConversationsServer{stream})
 }
 
-type RicochetCore_StreamConversationsServer interface {
+type RicochetCore_MonitorConversationsServer interface {
 	Send(*ConversationEvent) error
-	Recv() (*ConversationEvent, error)
 	grpc.ServerStream
 }
 
-type ricochetCoreStreamConversationsServer struct {
+type ricochetCoreMonitorConversationsServer struct {
 	grpc.ServerStream
 }
 
-func (x *ricochetCoreStreamConversationsServer) Send(m *ConversationEvent) error {
+func (x *ricochetCoreMonitorConversationsServer) Send(m *ConversationEvent) error {
 	return x.ServerStream.SendMsg(m)
 }
 
-func (x *ricochetCoreStreamConversationsServer) Recv() (*ConversationEvent, error) {
-	m := new(ConversationEvent)
-	if err := x.ServerStream.RecvMsg(m); err != nil {
+func _RicochetCore_SendMessage_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(Message)
+	if err := dec(in); err != nil {
 		return nil, err
 	}
-	return m, nil
+	if interceptor == nil {
+		return srv.(RicochetCoreServer).SendMessage(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/ricochet.RicochetCore/SendMessage",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(RicochetCoreServer).SendMessage(ctx, req.(*Message))
+	}
+	return interceptor(ctx, in, info, handler)
 }
 
 var _RicochetCore_serviceDesc = grpc.ServiceDesc{
@@ -578,6 +605,10 @@ var _RicochetCore_serviceDesc = grpc.ServiceDesc{
 			MethodName: "RejectInboundRequest",
 			Handler:    _RicochetCore_RejectInboundRequest_Handler,
 		},
+		{
+			MethodName: "SendMessage",
+			Handler:    _RicochetCore_SendMessage_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{
@@ -591,10 +622,9 @@ var _RicochetCore_serviceDesc = grpc.ServiceDesc{
 			ServerStreams: true,
 		},
 		{
-			StreamName:    "StreamConversations",
-			Handler:       _RicochetCore_StreamConversations_Handler,
+			StreamName:    "MonitorConversations",
+			Handler:       _RicochetCore_MonitorConversations_Handler,
 			ServerStreams: true,
-			ClientStreams: true,
 		},
 	},
 	Metadata: fileDescriptor3,
@@ -603,31 +633,32 @@ var _RicochetCore_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("core.proto", fileDescriptor3) }
 
 var fileDescriptor3 = []byte{
-	// 414 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x9c, 0x54, 0x41, 0xaf, 0xd2, 0x40,
-	0x10, 0x4e, 0x4d, 0x24, 0x3a, 0x50, 0x0c, 0x2b, 0x51, 0x2c, 0x88, 0x04, 0x3d, 0x70, 0x22, 0x44,
-	0xc3, 0xcd, 0x83, 0xa4, 0xa8, 0x21, 0x11, 0x0f, 0x6d, 0x30, 0xf1, 0x58, 0xb6, 0x93, 0x58, 0xc5,
-	0x6e, 0xdd, 0x0e, 0x18, 0x7e, 0xfd, 0x7b, 0x0b, 0xdd, 0xa5, 0x6d, 0x0a, 0x8f, 0x97, 0x77, 0x63,
-	0xbf, 0xef, 0x9b, 0x6f, 0x67, 0x3e, 0x66, 0x0b, 0xc0, 0x85, 0xc4, 0x71, 0x22, 0x05, 0x09, 0xf6,
-	0x44, 0x46, 0x5c, 0xf0, 0x5f, 0x48, 0x8e, 0x1d, 0x23, 0xfd, 0x17, 0xf2, 0x4f, 0x46, 0x38, 0xcd,
-	0x28, 0xc4, 0x98, 0x22, 0xda, 0xeb, 0xb3, 0xcd, 0x45, 0x4c, 0x01, 0x27, 0x7d, 0x64, 0xea, 0xb8,
-	0x43, 0x99, 0x06, 0x14, 0x89, 0x38, 0xc3, 0x86, 0x53, 0x78, 0xee, 0xa3, 0x54, 0xa8, 0x4f, 0x01,
-	0x6d, 0x53, 0x0f, 0xff, 0x6d, 0x31, 0x25, 0xd6, 0x07, 0x90, 0x09, 0xff, 0xa1, 0xc4, 0x4a, 0xda,
-	0xb1, 0x06, 0xd6, 0xe8, 0xb1, 0x57, 0x40, 0x86, 0x3f, 0xa1, 0x55, 0x2e, 0x4b, 0x36, 0xfb, 0x6b,
-	0x45, 0xec, 0x1d, 0xd8, 0xe9, 0xb1, 0xc8, 0x48, 0x1e, 0x29, 0xc9, 0x53, 0xaf, 0x0c, 0xbe, 0xbf,
-	0xa9, 0x41, 0xc3, 0xd3, 0x03, 0xba, 0x6a, 0x68, 0xb6, 0x84, 0x67, 0x5f, 0x91, 0x8a, 0xd7, 0xb1,
-	0xd7, 0x63, 0x13, 0xc1, 0xf8, 0x4c, 0xf7, 0x4e, 0xf7, 0x12, 0x7d, 0xe8, 0xf2, 0x1b, 0x34, 0x97,
-	0x22, 0x8e, 0x48, 0xc8, 0xef, 0x59, 0x78, 0xec, 0x4d, 0x2e, 0x2f, 0x33, 0xc6, 0xef, 0x65, 0x2e,
-	0xd0, 0x4c, 0x66, 0x38, 0xb1, 0xd8, 0x17, 0x68, 0xa8, 0xdf, 0x92, 0x8c, 0x57, 0xb1, 0xb3, 0x02,
-	0x7e, 0xcd, 0x89, 0xcd, 0xa1, 0xee, 0x93, 0x48, 0x8c, 0x4d, 0xaf, 0x68, 0x73, 0x82, 0xaf, 0xba,
-	0x7c, 0x84, 0xba, 0x8a, 0x6a, 0xa1, 0xb7, 0x80, 0xbd, 0xca, 0x75, 0x06, 0x33, 0x16, 0xac, 0x4a,
-	0x1d, 0x82, 0xd6, 0xf3, 0xbb, 0xd9, 0xde, 0xa4, 0x6c, 0x50, 0x89, 0xc6, 0x50, 0xc6, 0xe8, 0x45,
-	0xae, 0xd0, 0xd4, 0xe7, 0x9d, 0xf2, 0x53, 0xd1, 0x7c, 0x82, 0xd6, 0x2c, 0x0c, 0x35, 0x68, 0x16,
-	0xab, 0x53, 0x91, 0x1b, 0xa3, 0x56, 0x85, 0x61, 0x53, 0xb0, 0x57, 0x49, 0x18, 0x10, 0x1a, 0xa0,
-	0xaa, 0x39, 0x57, 0xb6, 0x04, 0x7b, 0x8e, 0x1b, 0xcc, 0xcb, 0xfa, 0xb9, 0xa6, 0x44, 0x98, 0xab,
-	0x7b, 0x17, 0xf9, 0xc3, 0xc2, 0xb8, 0xd0, 0x9e, 0x71, 0x8e, 0x09, 0x2d, 0xe2, 0xb5, 0xd8, 0xc6,
-	0xe1, 0x83, 0x46, 0x59, 0x41, 0xdb, 0xc3, 0xdf, 0xc8, 0xef, 0x6f, 0xf2, 0x36, 0x67, 0xce, 0x55,
-	0x66, 0xbd, 0xf9, 0xea, 0xf9, 0x92, 0xc4, 0xe0, 0xaf, 0x5b, 0x78, 0xda, 0x29, 0xeb, 0x96, 0x5c,
-	0x4f, 0xc4, 0xf1, 0x9f, 0x71, 0xee, 0x22, 0x47, 0xd6, 0xc4, 0x5a, 0xd7, 0x8e, 0x9f, 0x86, 0x0f,
-	0xb7, 0x01, 0x00, 0x00, 0xff, 0xff, 0x7f, 0x06, 0xe1, 0xc6, 0x74, 0x04, 0x00, 0x00,
+	// 429 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x9c, 0x54, 0x5d, 0xaf, 0xd2, 0x40,
+	0x10, 0x0d, 0x26, 0x7e, 0xcd, 0xbd, 0xbd, 0x86, 0x95, 0xe8, 0xb5, 0x22, 0x12, 0xd4, 0xc4, 0x27,
+	0x62, 0x24, 0xbc, 0xf9, 0x20, 0x01, 0x35, 0x24, 0xd6, 0x87, 0x12, 0x4c, 0x4c, 0x7c, 0x29, 0xdb,
+	0x89, 0x56, 0xc9, 0x6e, 0xdd, 0x1d, 0x30, 0xfc, 0x38, 0xff, 0x9b, 0x0b, 0xdd, 0x65, 0xdb, 0xb4,
+	0x04, 0xe3, 0x1b, 0x7b, 0xce, 0x99, 0xd3, 0x99, 0xb3, 0xb3, 0x00, 0x70, 0xa9, 0x70, 0x98, 0x2b,
+	0x49, 0x92, 0xdd, 0x51, 0x19, 0x97, 0xfc, 0x3b, 0x52, 0x18, 0x08, 0xa4, 0xdf, 0x52, 0xfd, 0x2c,
+	0x88, 0xf0, 0x2a, 0x4b, 0x51, 0x50, 0x46, 0x3b, 0x7b, 0x0e, 0xb8, 0x14, 0x94, 0x70, 0xb2, 0x47,
+	0x66, 0x8e, 0x5b, 0x54, 0x3a, 0xa1, 0x4c, 0x8a, 0x02, 0x1b, 0x8c, 0xe1, 0xfe, 0x02, 0x95, 0x41,
+	0x17, 0x94, 0xd0, 0x46, 0xc7, 0xf8, 0x6b, 0x83, 0x9a, 0x58, 0x0f, 0x40, 0xe5, 0xfc, 0xb3, 0x11,
+	0x1b, 0xe9, 0x75, 0xab, 0xdf, 0x7a, 0x79, 0x33, 0x2e, 0x21, 0x83, 0x2f, 0xd0, 0xae, 0x96, 0xe5,
+	0xeb, 0xdd, 0xb9, 0x22, 0xf6, 0x1c, 0x02, 0x7d, 0x28, 0x72, 0x92, 0x1b, 0x46, 0x72, 0x37, 0xae,
+	0x82, 0xaf, 0xff, 0xdc, 0x86, 0xcb, 0xd8, 0x0e, 0x38, 0x35, 0x43, 0xb3, 0x08, 0xee, 0x7d, 0x40,
+	0x2a, 0x7f, 0x8e, 0x3d, 0x19, 0xba, 0x08, 0x86, 0x0d, 0xdd, 0x87, 0x8f, 0x4f, 0xd1, 0xfb, 0x2e,
+	0x3f, 0xc2, 0x55, 0x24, 0x45, 0x46, 0x52, 0x7d, 0x2a, 0xc2, 0x63, 0x4f, 0xbd, 0xbc, 0xca, 0x38,
+	0xbf, 0x87, 0x5e, 0x60, 0x99, 0xc2, 0xf0, 0x55, 0x8b, 0xbd, 0x87, 0x4b, 0xf3, 0x5b, 0x91, 0xf3,
+	0x2a, 0x77, 0x56, 0xc2, 0xcf, 0x39, 0xb1, 0x19, 0x5c, 0x2c, 0x48, 0xe6, 0xce, 0xa6, 0x5b, 0xb6,
+	0x39, 0xc2, 0x67, 0x5d, 0xde, 0xc0, 0x85, 0x89, 0x6a, 0x6e, 0xb7, 0x80, 0x3d, 0xf2, 0x3a, 0x87,
+	0x39, 0x0b, 0x56, 0xa7, 0xf6, 0x41, 0xdb, 0xf9, 0xa7, 0xc5, 0xde, 0x68, 0xd6, 0xaf, 0x45, 0xe3,
+	0x28, 0x67, 0xf4, 0xc0, 0x2b, 0x2c, 0xf5, 0x6e, 0x6b, 0xfc, 0x4c, 0x34, 0x6f, 0xa1, 0x3d, 0x49,
+	0x53, 0x0b, 0xba, 0xc5, 0xba, 0xae, 0xc9, 0x9d, 0x51, 0xbb, 0xc6, 0xb0, 0x31, 0x04, 0xcb, 0x3c,
+	0x4d, 0x08, 0x1d, 0x50, 0xd7, 0x34, 0x95, 0x45, 0x10, 0xcc, 0x70, 0x8d, 0xbe, 0xac, 0xe7, 0x35,
+	0x15, 0xc2, 0x7d, 0xba, 0x7b, 0x92, 0xdf, 0x2f, 0xcc, 0x14, 0x3a, 0x13, 0xce, 0x31, 0xa7, 0xb9,
+	0x58, 0xc9, 0x8d, 0x48, 0xff, 0x6b, 0x94, 0x25, 0x74, 0x62, 0xfc, 0x81, 0xfc, 0xdf, 0x4d, 0x9e,
+	0x79, 0xa6, 0xa9, 0xb2, 0xe8, 0xed, 0x2b, 0x74, 0xfc, 0xbd, 0x1c, 0xdf, 0xb6, 0x66, 0x2f, 0x9a,
+	0xee, 0xcd, 0xf3, 0x0d, 0x0f, 0xa5, 0xcc, 0xbb, 0x1b, 0x1c, 0x99, 0xa5, 0x44, 0x91, 0x46, 0xa8,
+	0x75, 0xf2, 0x0d, 0xcb, 0xe9, 0x5b, 0x28, 0xac, 0x43, 0xab, 0x5b, 0x87, 0x3f, 0x96, 0xd1, 0xdf,
+	0x00, 0x00, 0x00, 0xff, 0xff, 0xa3, 0x96, 0xd5, 0x66, 0xb2, 0x04, 0x00, 0x00,
 }
diff --git a/rpc/core.proto b/rpc/core.proto
index 628f41c..d8f510e 100644
--- a/rpc/core.proto
+++ b/rpc/core.proto
@@ -42,7 +42,9 @@ service RicochetCore {
     rpc AcceptInboundRequest (ContactRequest) returns (Contact);
     rpc RejectInboundRequest (ContactRequest) returns (RejectInboundRequestReply);
 
-    rpc StreamConversations (stream ConversationEvent) returns (stream ConversationEvent);
+    // Open a stream to monitor messages in conversations with contacts.
+    rpc MonitorConversations (MonitorConversationsRequest) returns (stream ConversationEvent);
+    rpc SendMessage (Message) returns (Message);
 }
 
 message ServerStatusRequest {