Get current API usage and quota status

Returns the current period's API guide usage (guides created through the API or MCP), quota limit, remaining count and the renewal date. Aligned on the Stripe subscription billing cycle, or on the calendar month (UTC) for a Conqueror account without a subscription. Does not consume credits. enforced tells whether the quota is enforced on the current window: when true, a guide creation through the API or MCP that would exceed the limit is refused with HTTP 402 (see POST /api/v1/guides). When false (any plan other than Conqueror, a billing cycle that started before the refusal went live, or a Conqueror subscription in payment recovery, counted over the last 30 days with no reset date), the figures are informational only and nothing is refused on quota grounds. upgrade_url is the absolute link to the "Priority and API volume" add-on (the same as details.upgrade_url of the 402), absent when the add-on cannot raise the quota (already at its highest volume, or account without a subscription to add it to).