Register a domain
Register a domain that will present the Apple Pay button.
On self_managed instances the domain is marked verified immediately: you attest domain ownership to Apple yourself by registering the domain in the Apple Developer portal, where Apple fetches the domain-association file you serve at /.well-known/apple-developer-merchantid-domain-association.txt.
On sf_operated instances Guardian instead schedules a background verification that registers the domain with Apple’s Web Merchant Registration API using the platform integrator identity, and the domain starts as pending. If the verification attempt cannot be scheduled, the request returns 503 with the classifier ENQUEUE_FAILED; retry the request.
Authorizations
Body
Fully-qualified domain name.
"pay.example.com"