One yes/no question about each company's own offering, as a seller would ask it (10–300 characters), e.g. "Do they let their users book appointments inside their product?". Answered only from the company's own website.

Spend ceiling for this call, in credits. If the most the call can cost is above it, the call is refused before anything is reserved or charged. No company you sent is dropped to fit. It is a ceiling only: it never lets the call use a dearer source. Where spend ceilings aren't available to this key yet, a request that sets it is refused with the reason.

Return this call's plan instead of running it, as of evaluated_at: the most it can cost, how many sources could answer, what budget_credits changes, and every limit the real call would trip. Nothing is looked up, reserved or charged, and a later call may differ. Where previews aren't available to this key yet, a request that sets it is refused with the reason.