Thanks for your request. The team reviews applications for access to the Ads API on a case-by-case basis every week, but sometimes delays can occur due to inbound interest levels or team resources. We appreciate your patience if this takes a little longer than usual.
There is no way to access the Ads API using “temporary” tokens - the access is provided for individual whitelisted application IDs.
Also note that the initial access level will provide up to 5 OAuth tokens, so you should ensure that you apply for access for a test environment application initially, to avoid having existing user logins restricted for larger multi-user apps already in production.
