Contact
Talk to a person who knows the API
Sales questions, integration help, a volume quote or a bug you cannot pin down — same inbox, same people who build it.
Response times
Within one business day on every plan. Growth gets a four-hour target, Scale gets a shared Slack channel with a one-hour target.
Reporting a bug?
Include the endpoint, the full query string, the marketplace and what you expected. That is almost always enough to reproduce it on the first try.