Simulate a collection

The same, for your collection account rather than a customer’s. Test keys only.

Test keys only. An sk_live_ key is refused with 403 not_test_mode. See test mode.

The same thing for a merchant's collection account, for anyone not using per-customer accounts. Optional account_number picks a specific account of theirs; omitted, it uses their collection account.

{ "outcome": "underpaid", "amount": 5000, "account_number": "9913607261" }

An account number belonging to someone else answers 404 not_found, not 403. Telling the two apart would turn this into a way to ask whether a given account number belongs to us.