Tenant, key meta, and policy
API key OR the magic-link session cookie (no Authorization header needed when signed in via the dashboard). Session-cookie callers get key null.
Authentication
AuthorizationBearer
Bearer authentication of the form Bearer <token>, where token is your auth token.
Response
Current tenant and key (no raw key). Includes the tenant’s receipt usage for the month and billing status. Free tier is 10,000 receipts/month; POST /v1/check returns 402 payment_required once it is exhausted or billing is past due. 402 bodies carry portal_endpoint (/v1/billing/portal).
Errors
401
Unauthorized Error