GPI-anchored cell membrane protein involved in Nodal signaling. Cell-associated CRIPTO acts as a Nodal coreceptor in cis. Shedding of CRIPTO by TMEM8A modulates Nodal signaling by allowing soluble CRIPTO to act as a Nodal coreceptor on other cells (PubMed:27881714). Could play a role in the determination of the epiblastic cells that subsequently give rise to the mesoderm (PubMed:11909953). {ECO:0000269|PubMed:11909953, ECO:0000269|PubMed:27881714}. This is the function of CRIPTO (cripto, EGF-CFC family member, ENSG00000241186).