diff --git a/mcp/transport.go b/mcp/transport.go
index 024863de..56959632 100644
--- a/mcp/transport.go
+++ b/mcp/transport.go
@@ -93,6 +93,18 @@ func (*StdioTransport) Connect(context.Context) (Connection, error) {
 	return newIOConn(rwc{os.Stdin, os.Stdout}), nil
 }
 
+// An IOTransport is a [Transport] that communicates over separate
+// io.ReadCloser and io.WriteCloser using newline-delimited JSON.
+type IOTransport struct {
+	Reader io.ReadCloser
+	Writer io.WriteCloser
+}
+
+// Connect implements the [Transport] interface.
+func (t *IOTransport) Connect(context.Context) (Connection, error) {
+	return newIOConn(rwc{t.Reader, t.Writer}), nil
+}
+
 // An InMemoryTransport is a [Transport] that communicates over an in-memory
 // network connection, using newline-delimited JSON.
 type InMemoryTransport struct {