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GET
/
v1
/
metrics
/
open-interest-total-usd
Open Interest Total Usd
curl --request GET \
  --url https://api.blockworks.com/v1/metrics/open-interest-total-usd \
  --header 'x-api-key: <api-key>'
{
  "projectName": [
    {
      "date": "2025-08-10",
      "value": 123456.789
    },
    {
      "date": "2025-08-11",
      "value": 234567.89
    },
    {
      "date": "2025-08-12",
      "value": 345678.901
    }
  ]
}

​
Overview

  • Denomination: USD
  • Type: USD Value
  • Interval: Daily
  • Source: Blockworks

​
Example Request

curl -H "x-api-key: YOUR_API_KEY" \
  "https://api.blockworks.com/v1/metrics/open-interest-total-usd?project=polymarket"

​
Example Response

{
  "polymarket": [
    {
      "date": "2026-04-15",
      "value": 408415217.7541521
    },
    {
      "date": "2026-04-16",
      "value": 388408543.3229606
    },
    {
      "date": "2026-04-17",
      "value": 402073781.78728473
    },
    {
      "date": "2026-04-18",
      "value": 403728026.87854636
    },
    {
      "date": "2026-04-19",
      "value": 424096285.870069
    }
  ]
}

​
Notes

  • Intervals are daily unless otherwise noted.
  • Data is updated daily and may be revised after late-arriving data.

Authorizations

​
x-api-key
string
header
required

Query Parameters

​
project
enum<string>
required

Project slug (comma-separated for multiple).

Available options:
polymarket
Example:

"polymarket"

​
start_date
string<date>

Start date (YYYY-MM-DD)

​
end_date
string<date>

End date (YYYY-MM-DD)

Response

OK

​
{key}
object[]