Returns the single history row identified by the universe +
day + engine triple. Returns 404 if no row matches.
Use this when you already know the exact (day, engine) you
want — cheaper and clearer than calling
/universes/{id}/history?day=...&engine=... and pulling the
first element of data.
Generate a key at /dashboard/settings/api-keys. Pass it as
Authorization: Bearer vso_xxx on every request.
Universe UUID — see GET /universes.
YYYY-MM-DD.
AI engine identifier.
chatgpt, gemini, grok, claude OK
Single row from the history table — one row per
(universe, day, engine) triple. Every column listed here is a
separately documented response field; the *_over_time and
*_index columns are JSONB arrays whose internal shape is
described per-column.