Public read of merchant identity + theme.
Returns 404 if X-Site-ID is missing or doesn’t match an active
merchant. No rate limiting (the SPA hits this once per page load
on a fixed Stella subdomain — abuse risk is low).
Documentation Index
Fetch the complete documentation index at: https://docs.stella-commerce.com/llms.txt
Use this file to discover all available pages before exploring further.
Successful Response
Per-merchant identity + branding payload.
extra carries any non-canonical keys merchants stored in
merchants.checkout_theme so future fields (custom CSS variables,
font URLs, etc.) round-trip without schema changes.