In the context of N=4 super-Yang-Mills theory the integrable structure present in the planar limit is not expected to survive inclusion if 1/N corrections. We argue that, perturbatively, the planar integrable structure gives information about 1/N corrections as well. We describe the necessary computational details and illustrate this technology with the computation of some tree level and 1-loop 3-point functions. The same techniques can be used to compute higher loops anomalous dimensions if integrability is restricted to the 1-loop dilatation operator or if it is not known how to diagonalize the Hamiltonian of the higher loop integrable system.