Per-instrument open interest (margined listings).

GET 
/v1/open_interest

One-sided open interest for every margined listing, in contract units and mark-notional µUSDC, exact at one engine snapshot seq. Served from a ~2s single-flight cache; event-class (fully collateralized) instruments are not included.

Responses

200

Open-interest rows for all margined instruments.

500

Unexpected server error. Includes a correlation_id; report it when filing a bug.

503

A required downstream (matching engine, ClickHouse, custody, instrument service) is unreachable. The request was not processed; retry with backoff.