In this research, we investigate the characteristics of radiative magnetohydrodynamic (MHD) stagnation point flow over a nonlinear stretching sheet, taking into account the influences of thermophoresis and Brownian motion of nanoparticles. Employing a similarity transformation technique, the governing partial differential equations are transformed into a set of ordinary differential equations (ODEs). Additionally, the Homotopy Analysis Method (HAM) is employed to elucidate the associated mechanisms. Our findings reveal that enhanced magnetic and velocity exponent parameters lead to a dampening effect on the fluid velocity, while the presence of thermophoresis and Brownian motion intensifies specific thermal influences.