Open Interest

GET openinterest
GET greatestopeninterest
Greatest Open Interest Object

GET openinterest

Description

Get the open interest for the specified instruments and date.

Resource URL

https://api.optionscity.com/openinterest

Authentication	Required
HTTP Methods	GET
Media Types	application/json
Response Object	Market Data
Response Type	Standard

Parameters

Name	Description	Required?	Type
instrument_ids	The instrument IDs for which to fetch open interest.	Yes	NumberArray
date	The local date for which to return open interest. Only day precision is required; additional precision will be ignored. If not provided, the most recent open interest will be returned. (Many open interest values aren't posted until about 6:30 PM CST.)	No	LocalDate*

Example Request

GET https://api.optionscity.com/openinterest?instrument_ids=53330019505fad6e0ff1ab25&date=2014-04-16

Example Response

[ {
  "instrument_id" : 1,
  "quantity" : 38125,
  "side" : "OpenInterest",
  "timestamp" : "2019-02-22T13:30:30.413Z",
  "close_date" : "2019-02-22"
} ]

GET greatestopeninterest

Description

Get every future with the greatest open interest for each product group.

Resource URL

https://api.optionscity.com/greatestopeninterest

Authentication	Required
HTTP Methods	GET
Media Types	application/json
Response Object	Greatest Open Interest
Response Type	Standard

Parameters

Name	Description	Required?	Type
embed_instrument	Whether instrument descriptions should be embedded in the response objects. Default is false.	No	Boolean

Example Request

GET https://api.optionscity.com/greatestopeninterest

Example Response

[ {
  "instrument_id" : 1234,
  "open_interest" : 1174
} ]

Greatest Open Interest Object

Description

The open interest for the future with the greatest open interest for a product group.

Fields

Field	Type	Optional	Description
instrument_id	Number	No	The City API instrument ID for the future.
instrument	Object	Yes	A full embedded instrument description, if requested.
open_interest	Number	No	The open interest for the future.

JSON Sample

{
  "instrument_id" : 1234,
  "open_interest" : 1174
}

* Date and time elements are ISO-8601 string representations