---
title: "Open Interest Historic"
method: GET
path: "/open-interest/{symbol}"
tags: ["market-data"]
---

# Open Interest Historic

`GET /open-interest/{symbol}`

Return historic open interest for a symbol over a time range with forward filling.

## Path parameters

- `symbol` string, required

## Query parameters

- `intervalMinutes` integer, required
- `fromISO` string, required
- `toISO` string, required

## Response `200`

OK

- OpenInterestHistoricResponseBody
  - `$schema` string, uri — A URL to the JSON Schema for this object.
  - `count` integer, required
  - `data` OpenInterestPoint[], nullable, required
    - `intervalMinutes` integer, required
    - `openInterest` number, double, nullable, required
    - `symbol` string, required
    - `windowStart` string, required

## Other responses

- `default` — Error

---

[API](https://skmtc.dev/qfex/apis/qfex-rest-api.md) · [All operations](https://skmtc.dev/qfex/apis/qfex-rest-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/qfex/qfex-rest-api/revisions/19b17e5a1f6b/schema)