  We study the resurgent structure of Walcher's real topological string on
general Calabi--Yau manifolds. We find all-orders trans-series solutions to the
corresponding holomorphic anomaly equations, by extending the operator
formalism of the closed topological string, and we obtain explicit formulae for
multi-instanton amplitudes. We find that the integer invariants counting disks
appear as Stokes constants in the resurgent structure, and we provide
experimental evidence for our results in the case of the real topological
string on local $\mathbb P^2$.
