In this study, the convective transport of a temperature-dependent magneto-micropolar fluid over a stretching surface embedded in a porous medium is examined. The formulation accounts for viscous dissipation, internal heat generation or absorption, and radiative heat transfer modeled through the Rosseland diffusion approximation, which is appropriate for optically thick media. The governing equations, developed without the use of similarity transformations, are solved using the Optimal Homotopy Analysis Method (OHAM). The resulting velocity, microrotation, and temperature fields are illustrated through graphical and tabulated data across a broad range of physical parameters. Validation against existing literature demonstrates the reliability of the present approach. Quantitative analysis shows that the microrotation boundary layer decreases by approximately 18–25% with increasing micropolar parameter, while thermal boundary layer thickness increases by about 10–14% under stronger radiative effects. Moreover, micropolar fluids exhibit a thinner momentum boundary layer compared to Newtonian fluids under identical conditions. Specifically, the Newtonian case yields a thinner layer relative to the micropolar case . Overall, the results provide valuable insights into micropolar fluid behavior with practical implications in porous and radiative flow systems.