diff --git a/fs/rc/internal.go b/fs/rc/internal.go
index 448cd2f95..6d8a296fd 100644
--- a/fs/rc/internal.go
+++ b/fs/rc/internal.go
@@ -7,6 +7,7 @@ import (
 	"runtime"
 
 	"github.com/ncw/rclone/fs"
+	"github.com/ncw/rclone/fs/config/obscure"
 	"github.com/ncw/rclone/fs/version"
 	"github.com/pkg/errors"
 )
@@ -191,3 +192,34 @@ func rcVersion(in Params) (out Params, err error) {
 	}
 	return out, nil
 }
+
+func init() {
+	Add(Call{
+		Path:  "core/obscure",
+		Fn:    rcObscure,
+		Title: "Obscures a string passed in.",
+		Help: `
+Pass a clear string and rclone will obscure it for the config file:
+- clear - string
+
+Returns
+- obscured - string
+`,
+	})
+}
+
+// Return obscured string
+func rcObscure(in Params) (out Params, err error) {
+	clear, err := in.GetString("clear")
+	if err != nil {
+		return nil, err
+	}
+	obscured, err := obscure.Obscure(clear)
+	if err != nil {
+		return nil, err
+	}
+	out = Params{
+		"obscured": obscured,
+	}
+	return out, nil
+}
diff --git a/fs/rc/internal_test.go b/fs/rc/internal_test.go
index 4cd133ffc..39789bdfd 100644
--- a/fs/rc/internal_test.go
+++ b/fs/rc/internal_test.go
@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/ncw/rclone/fs"
+	"github.com/ncw/rclone/fs/config/obscure"
 	"github.com/ncw/rclone/fs/version"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -93,3 +94,15 @@ func TestCoreVersion(t *testing.T) {
 	v := out["decomposed"].(version.Version)
 	assert.True(t, len(v) >= 2)
 }
+
+func TestCoreObscure(t *testing.T) {
+	call := Calls.Get("core/obscure")
+	assert.NotNil(t, call)
+	in := Params{
+		"clear": "potato",
+	}
+	out, err := call.Fn(in)
+	require.NoError(t, err)
+	require.NotNil(t, out)
+	assert.Equal(t, in["clear"], obscure.MustReveal(out["obscured"].(string)))
+}