  A classically scale-invariant scalar singlet can be a MeV-scale dark matter,
with a feeble Higgs portal coupling at $\mathcal{O}(10^{-10})$. Besides, an
$\mathcal{O}(0.1)$ self-interaction coupling could further serve to alleviate
the small-scale problems in the Universe. We show that, such a dark matter
candidate can naturally arise in the warped extra dimension, with the huge span
of parameter space predicted well within $\mathcal{O}(1)$ fundamental
parameters.
