Erpnext with flutter

hi friends i am a flutter developer and i recently known about erpnext and it was best suit for my development with business management and other e-commerce app management so i need to connect it with flutter projects and ,i am a foss developer so no problem to connect with people and even i am ready to make it benefit for all but i need some help . i try it but after using api end point it get some error on both client and server side so any one know procedure for connect erpnext with flutter app through is good guidance for me .