To tokenise cards from Channex you need to perform capture requests from secure.channex.io endpoint (if you want to test with Channex staging account it will be secure-staging.channex.io).
There are two Channex tokenisation profiles that should be used depending on which channex endpoint you use.
Request templatePOST https://pci.channex.io/api/v1/capture?api_key=<API_KEY>&profile=<PROFILE>&method=get&url<SECURE_CHANNEX_ENDPOINT>