Crypto Open Interest — Futures Market Overview | Surf

Compare futures market funding, volume and open interest

How to use this Tool

Use the deployed input fields below. Required fields must be supplied; optional filters narrow the result.

queryParams.order (Optional): Sort order. Example: desc. Defaults to "desc".

queryParams.sort_by (Optional): Field to sort results by. Example: volume_24h. Defaults to "volume_24h".

What this Tool returns

Returns the available futures-market list with funding rates, volume, open interest and long/short context.

Response fields and how to read them

The table follows the official response contract, including nested fields and useful response metadata. [] denotes an array item. Required means required within its parent object, not that a conditional parent always exists. A nullable type permits null; an optional field can be absent. Use the documented conditions below to distinguish missing, empty and zero values. Units and reporting windows apply only where explicitly documented.

Coverage, units and freshness

The deployed input does not expose symbol or row-limit filters. Keep source timestamps and units rather than describing the list as a universal live derivatives feed.

Inspect any returned observation time, cache status, watermark, pagination and errors using their documented meanings. A successful request alone does not establish complete coverage. Where no freshness or completeness guarantee is documented, treat it as unknown. Saved Examples are historical and viewing them does not refresh data or execute a new call.

Data source and references

Surf supplies this endpoint through its Data API. Response contract and deployed Tool inputs reviewed on 2026-10-03 against official OpenAPI v0.2.102. This is a contract review date, not a data observation time. Coverage depends on the selected endpoint and request.

Surf Data API documentation

Official Surf OpenAPI contract

Use one Toolmu account and a shared prepaid balance across available Tools. Pay per use; no separate supplier subscription is required. The current execution ceiling for this Tool is 0.0144 Toolmu credits per call. This is a maximum, not the settled charge. Before execution, get the current Tool contract and check availability, the latest maximumCredits, your balance and budget. Supplier response credits_used, when present, describes supplier API credits and is not the Toolmu customer charge.