mpo apiThe MPO API is a Remote Procedure Call (RPC) API that accepts JSON. Unless otherwise indicated, all requests use the HTTP POST operation, and the desired operation is specified inTo predict the CNS MPO Score with cxcalc, use the mpo function: cxcalc -N ih mpo aspirine 5.75 Chemical Terms. To predict the MPO Score with Chemical Terms, use the mpo() function: