diff --git a/c_src/quicer_ctx.c b/c_src/quicer_ctx.c
index 43f85280..45e7adf6 100644
--- a/c_src/quicer_ctx.c
+++ b/c_src/quicer_ctx.c
@@ -437,3 +437,18 @@ cleanup_owner_signals(QuicerStreamCTX *s_ctx)
   OwnerSignalQueueDestroy(s_ctx->sig_queue);
   s_ctx->sig_queue = NULL;
 }
+
+ERL_NIF_TERM
+copy_stream_handle(ErlNifEnv *env,
+                   __unused_parm__ int argc,
+                   const ERL_NIF_TERM argv[])
+{
+  QuicerStreamCTX *ctx = NULL;
+  if (!enif_get_resource(env, argv[0], ctx_stream_t, (void **)&ctx))
+    {
+      return enif_make_badarg(env);
+    }
+  assert(ctx != NULL);
+  enif_make_copy(ctx->env, ctx->eHandle);
+  return ATOM_OK;
+}
diff --git a/c_src/quicer_ctx.h b/c_src/quicer_ctx.h
index 9482ed93..9068566d 100644
--- a/c_src/quicer_ctx.h
+++ b/c_src/quicer_ctx.h
@@ -202,4 +202,7 @@ void cache_stream_id(QuicerStreamCTX *s_ctx);
 
 void cleanup_owner_signals(QuicerStreamCTX *s_ctx);
 
+ERL_NIF_TERM
+copy_stream_handle(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[]);
+
 #endif // __QUICER_CTX_H_
diff --git a/c_src/quicer_nif.c b/c_src/quicer_nif.c
index 4cbd8b93..5dca270d 100644
--- a/c_src/quicer_nif.c
+++ b/c_src/quicer_nif.c
@@ -1741,6 +1741,7 @@ static ErlNifFunc nif_funcs[] = {
   { "get_conn_owner", 1, get_conn_owner1, 0},
   { "get_stream_owner", 1, get_stream_owner1, 0},
   { "get_listener_owner", 1, get_listener_owner1, 0},
+  { "copy_stream_handle", 1, copy_stream_handle, 0},
   /* for testing */
   { "mock_buffer_sig", 3, mock_buffer_sig, 0},
   #ifdef QUICER_USE_SNK
diff --git a/src/quicer_nif.erl b/src/quicer_nif.erl
index 16fa7934..6d35e00a 100644
--- a/src/quicer_nif.erl
+++ b/src/quicer_nif.erl
@@ -65,6 +65,7 @@
     get_conn_owner/1,
     get_stream_owner/1,
     get_listener_owner/1,
+    copy_stream_handle/1,
     mock_buffer_sig/3,
     set_snab_kc_pid/1,
     get_snab_kc_pid/0
@@ -385,6 +386,10 @@ get_connections() ->
 get_connections(_RegHandle) ->
     erlang:nif_error(nif_library_not_loaded).
 
+-spec copy_stream_handle(stream_handle()) -> {ok, stream_handle()} | {error, badarg}.
+copy_stream_handle(_H) ->
+    erlang:nif_error(nif_library_not_loaded).
+
 %% @doc enable signal buffering, used in stream handoff.
 %% * not exposed API.
 -spec enable_sig_buffer(stream_handle()) -> ok.