diff --git a/plugin/ocgrpc/context_test.go b/plugin/ocgrpc/context_test.go
new file mode 100644
index 000000000..f1227ba0f
--- /dev/null
+++ b/plugin/ocgrpc/context_test.go
@@ -0,0 +1,238 @@
+package ocgrpc
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net"
+	"testing"
+
+	"go.opencensus.io/plugin/ocgrpc/helloworld"
+	"go.opencensus.io/trace"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/test/bufconn"
+)
+
+type Recorder struct {
+	spans []*trace.SpanData
+}
+
+func (r *Recorder) ExportSpan(s *trace.SpanData) {
+	r.spans = append(r.spans, s)
+}
+
+func (r *Recorder) Flush() []*trace.SpanData {
+	spans := r.spans
+	r.spans = nil
+	return spans
+}
+
+func initTracer() func() []*trace.SpanData {
+	recorder := &Recorder{}
+	trace.RegisterExporter(recorder)
+	trace.ApplyConfig(trace.Config{DefaultSampler: trace.AlwaysSample()})
+	return recorder.Flush
+}
+
+var _ helloworld.GreeterServer = server{}
+
+type server struct {
+	*helloworld.UnimplementedGreeterServer
+}
+
+func (s server) SayHello(ctx context.Context, _ *helloworld.HelloRequest) (*helloworld.HelloReply, error) {
+	return &helloworld.HelloReply{Message: "Hallo"}, nil
+}
+
+// createDialer creates a connection to be used as context dialer in GRPC
+// communication.
+func createDialer(s *grpc.Server) func(context.Context, string) (net.Conn, error) {
+	const bufSize = 1024 * 1024
+
+	listener := bufconn.Listen(bufSize)
+	conn := func(context.Context, string) (net.Conn, error) {
+		return listener.Dial()
+	}
+
+	go func() {
+		if err := s.Serve(listener); err != nil {
+			log.Fatalf("Server exited with error: %v", err)
+		}
+	}()
+
+	return conn
+}
+
+func TestOutterSpanIsPassedToInterceptor(t *testing.T) {
+	flusher := initTracer()
+
+	s := grpc.NewServer()
+	defer s.Stop()
+
+	helloworld.RegisterGreeterServer(s, &server{})
+
+	dialer := createDialer(s)
+	ctx, outterSpan := trace.StartSpan(context.Background(), "outter_span", trace.WithSpanKind(1))
+	fmt.Printf("outter span: %s\n", outterSpan.SpanContext().SpanID.String())
+
+	conn, err := grpc.Dial(
+		"bufnet",
+		grpc.WithContextDialer(dialer),
+		grpc.WithInsecure(),
+		grpc.WithBlock(),
+		grpc.WithStatsHandler(&ClientHandler{
+			StartOptions: trace.StartOptions{
+				Sampler: trace.AlwaysSample(),
+			},
+		}),
+		grpc.WithUnaryInterceptor(func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+			outterSpanID := outterSpan.SpanContext().SpanID
+			ctxSpanID := trace.FromContext(ctx).SpanContext().SpanID
+			fmt.Printf("interceptor context span: %s\n", ctxSpanID.String())
+			if outterSpanID.String() == ctxSpanID.String() {
+				t.Error("span from context is the same as outter span")
+			}
+			return invoker(ctx, method, req, reply, cc, opts...)
+		}),
+	)
+	if err != nil {
+		t.Fatalf("failed to dial bufnet: %v", err)
+	}
+	defer conn.Close()
+
+	client := helloworld.NewGreeterClient(conn)
+
+	_, err = client.SayHello(
+		ctx,
+		&helloworld.HelloRequest{
+			Name: "Pupo",
+		},
+	)
+	if err != nil {
+		t.Fatalf("call to Register failed: %v", err)
+	}
+	outterSpan.End()
+
+	reportedSpans := flusher()
+
+	if want, have := 2, len(reportedSpans); want != have {
+		t.Errorf("unexpected number of spans")
+	}
+
+	if want, have := "helloworld.Greeter.SayHello", reportedSpans[0].Name; want != have {
+		t.Fatalf("unexpected first span reported")
+	}
+
+	fmt.Printf("client handler span: %s\n", reportedSpans[0].SpanID.String())
+}
+
+func TestClientInterceptorCannotAccessClientHandler(t *testing.T) {
+	flusher := initTracer()
+
+	s := grpc.NewServer()
+	defer s.Stop()
+
+	helloworld.RegisterGreeterServer(s, &server{})
+
+	dialer := createDialer(s)
+
+	ctx := context.Background()
+
+	conn, err := grpc.DialContext(
+		ctx,
+		"bufnet",
+		grpc.WithContextDialer(dialer),
+		grpc.WithInsecure(),
+		grpc.WithBlock(),
+		grpc.WithStatsHandler(&ClientHandler{
+			StartOptions: trace.StartOptions{
+				Sampler: trace.AlwaysSample(),
+			},
+		}),
+		grpc.WithUnaryInterceptor(func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
+			s := trace.FromContext(ctx)
+			if s == nil {
+				t.Fatalf("interceptor span is nil")
+			}
+			return invoker(ctx, method, req, reply, cc, opts...)
+		}),
+	)
+	if err != nil {
+		t.Fatalf("failed to dial bufnet: %v", err)
+	}
+	defer conn.Close()
+
+	client := helloworld.NewGreeterClient(conn)
+
+	_, err = client.SayHello(
+		context.Background(),
+		&helloworld.HelloRequest{
+			Name: "Pupo",
+		},
+	)
+	if err != nil {
+		t.Fatalf("call to Register failed: %v", err)
+	}
+
+	reportedSpans := flusher()
+
+	if want, have := 1, len(reportedSpans); want != have {
+		t.Errorf("unexpected number of spans")
+	}
+
+	if want, have := "helloworld.Greeter.SayHello", reportedSpans[0].Name; want != have {
+		t.Fatalf("unexpected first span reported")
+	}
+}
+
+func TestServerRegisterPersonSuccess(t *testing.T) {
+	flusher := initTracer()
+
+	s := grpc.NewServer(
+		grpc.StatsHandler(&ServerHandler{}),
+		grpc.UnaryInterceptor(func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
+			ctxSpan := trace.FromContext(ctx)
+			if ctxSpan == nil {
+				t.Fatalf("could not access to context span")
+			}
+			t.Logf("interceptor context span: %s\n", ctxSpan.SpanContext().SpanID.String())
+			return handler(ctx, req)
+		}),
+	)
+	defer s.Stop()
+
+	helloworld.RegisterGreeterServer(s, &server{})
+
+	dialer := createDialer(s)
+
+	ctx := context.Background()
+	conn, err := grpc.DialContext(
+		ctx,
+		"bufnet",
+		grpc.WithContextDialer(dialer),
+		grpc.WithInsecure(),
+	)
+	if err != nil {
+		t.Fatalf("failed to dial bufnet: %v", err)
+	}
+	defer conn.Close()
+
+	client := helloworld.NewGreeterClient(conn)
+
+	_, err = client.SayHello(ctx, &helloworld.HelloRequest{
+		Name: "Pupo",
+	})
+	if err != nil {
+		t.Fatalf("call to Register failed: %v", err)
+	}
+
+	reportedSpans := flusher()
+
+	if want, have := 1, len(reportedSpans); want != have {
+		t.Errorf("unexpected number of spans")
+	}
+
+	if want, have := "helloworld.Greeter.SayHello", reportedSpans[0].Name; want != have {
+		t.Fatalf("unexpected first span reported")
+	}
+}
diff --git a/plugin/ocgrpc/helloworld/helloworld.pb.go b/plugin/ocgrpc/helloworld/helloworld.pb.go
new file mode 100644
index 000000000..de31bda56
--- /dev/null
+++ b/plugin/ocgrpc/helloworld/helloworld.pb.go
@@ -0,0 +1,221 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.25.0
+// 	protoc        v3.13.0
+// source: helloworld.proto
+
+package helloworld
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+// The request message containing the user's name.
+type HelloRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+}
+
+func (x *HelloRequest) Reset() {
+	*x = HelloRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_helloworld_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *HelloRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*HelloRequest) ProtoMessage() {}
+
+func (x *HelloRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_helloworld_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use HelloRequest.ProtoReflect.Descriptor instead.
+func (*HelloRequest) Descriptor() ([]byte, []int) {
+	return file_helloworld_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *HelloRequest) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+// The response message containing the greetings
+type HelloReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Message string `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+}
+
+func (x *HelloReply) Reset() {
+	*x = HelloReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_helloworld_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *HelloReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*HelloReply) ProtoMessage() {}
+
+func (x *HelloReply) ProtoReflect() protoreflect.Message {
+	mi := &file_helloworld_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use HelloReply.ProtoReflect.Descriptor instead.
+func (*HelloReply) Descriptor() ([]byte, []int) {
+	return file_helloworld_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *HelloReply) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+var File_helloworld_proto protoreflect.FileDescriptor
+
+var file_helloworld_proto_rawDesc = []byte{
+	0x0a, 0x10, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x2e, 0x70, 0x72, 0x6f,
+	0x74, 0x6f, 0x12, 0x0a, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x22, 0x22,
+	0x0a, 0x0c, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x12,
+	0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61,
+	0x6d, 0x65, 0x22, 0x26, 0x0a, 0x0a, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x52, 0x65, 0x70, 0x6c, 0x79,
+	0x12, 0x18, 0x0a, 0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28,
+	0x09, 0x52, 0x07, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x32, 0x49, 0x0a, 0x07, 0x47, 0x72,
+	0x65, 0x65, 0x74, 0x65, 0x72, 0x12, 0x3e, 0x0a, 0x08, 0x53, 0x61, 0x79, 0x48, 0x65, 0x6c, 0x6c,
+	0x6f, 0x12, 0x18, 0x2e, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x2e, 0x48,
+	0x65, 0x6c, 0x6c, 0x6f, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x16, 0x2e, 0x68, 0x65,
+	0x6c, 0x6c, 0x6f, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x2e, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x52, 0x65,
+	0x70, 0x6c, 0x79, 0x22, 0x00, 0x42, 0x37, 0x5a, 0x35, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e,
+	0x67, 0x6f, 0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x6f, 0x72, 0x67, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x2f,
+	0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x73, 0x2f, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x77, 0x6f,
+	0x72, 0x6c, 0x64, 0x2f, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_helloworld_proto_rawDescOnce sync.Once
+	file_helloworld_proto_rawDescData = file_helloworld_proto_rawDesc
+)
+
+func file_helloworld_proto_rawDescGZIP() []byte {
+	file_helloworld_proto_rawDescOnce.Do(func() {
+		file_helloworld_proto_rawDescData = protoimpl.X.CompressGZIP(file_helloworld_proto_rawDescData)
+	})
+	return file_helloworld_proto_rawDescData
+}
+
+var file_helloworld_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_helloworld_proto_goTypes = []interface{}{
+	(*HelloRequest)(nil), // 0: helloworld.HelloRequest
+	(*HelloReply)(nil),   // 1: helloworld.HelloReply
+}
+var file_helloworld_proto_depIdxs = []int32{
+	0, // 0: helloworld.Greeter.SayHello:input_type -> helloworld.HelloRequest
+	1, // 1: helloworld.Greeter.SayHello:output_type -> helloworld.HelloReply
+	1, // [1:2] is the sub-list for method output_type
+	0, // [0:1] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_helloworld_proto_init() }
+func file_helloworld_proto_init() {
+	if File_helloworld_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_helloworld_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*HelloRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_helloworld_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*HelloReply); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_helloworld_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_helloworld_proto_goTypes,
+		DependencyIndexes: file_helloworld_proto_depIdxs,
+		MessageInfos:      file_helloworld_proto_msgTypes,
+	}.Build()
+	File_helloworld_proto = out.File
+	file_helloworld_proto_rawDesc = nil
+	file_helloworld_proto_goTypes = nil
+	file_helloworld_proto_depIdxs = nil
+}
diff --git a/plugin/ocgrpc/helloworld/helloworld.proto b/plugin/ocgrpc/helloworld/helloworld.proto
new file mode 100644
index 000000000..1a92a0621
--- /dev/null
+++ b/plugin/ocgrpc/helloworld/helloworld.proto
@@ -0,0 +1,17 @@
+syntax = "proto3";
+
+option go_package = "google.golang.org/grpc/examples/helloworld/helloworld";
+
+package helloworld;
+
+// The greeting service definition.
+service Greeter {
+  // Sends a greeting
+  rpc SayHello(HelloRequest) returns (HelloReply) {}
+}
+
+// The request message containing the user's name.
+message HelloRequest { string name = 1; }
+
+// The response message containing the greetings
+message HelloReply { string message = 1; }
\ No newline at end of file
diff --git a/plugin/ocgrpc/helloworld/helloworld_grpc.pb.go b/plugin/ocgrpc/helloworld/helloworld_grpc.pb.go
new file mode 100644
index 000000000..e47eab210
--- /dev/null
+++ b/plugin/ocgrpc/helloworld/helloworld_grpc.pb.go
@@ -0,0 +1,92 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package helloworld
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// GreeterClient is the client API for Greeter service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type GreeterClient interface {
+	// Sends a greeting
+	SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error)
+}
+
+type greeterClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewGreeterClient(cc grpc.ClientConnInterface) GreeterClient {
+	return &greeterClient{cc}
+}
+
+func (c *greeterClient) SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error) {
+	out := new(HelloReply)
+	err := c.cc.Invoke(ctx, "/helloworld.Greeter/SayHello", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// GreeterServer is the server API for Greeter service.
+// All implementations must embed UnimplementedGreeterServer
+// for forward compatibility
+type GreeterServer interface {
+	// Sends a greeting
+	SayHello(context.Context, *HelloRequest) (*HelloReply, error)
+	mustEmbedUnimplementedGreeterServer()
+}
+
+// UnimplementedGreeterServer must be embedded to have forward compatible implementations.
+type UnimplementedGreeterServer struct {
+}
+
+func (*UnimplementedGreeterServer) SayHello(context.Context, *HelloRequest) (*HelloReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SayHello not implemented")
+}
+func (*UnimplementedGreeterServer) mustEmbedUnimplementedGreeterServer() {}
+
+func RegisterGreeterServer(s *grpc.Server, srv GreeterServer) {
+	s.RegisterService(&_Greeter_serviceDesc, srv)
+}
+
+func _Greeter_SayHello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(HelloRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(GreeterServer).SayHello(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/helloworld.Greeter/SayHello",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(GreeterServer).SayHello(ctx, req.(*HelloRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Greeter_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "helloworld.Greeter",
+	HandlerType: (*GreeterServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "SayHello",
+			Handler:    _Greeter_SayHello_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "helloworld.proto",
+}