Market Open Interest

Onchain open interest for a specific market.

GET /v2/onchain/markets/{condition_id}/oi

Market open interest (onchain)

cURL

curl --request GET \
  --url https://api.polynode.dev/v2/onchain/markets/{condition_id}/oi

Returns the current open interest for a specific market, sourced from onchain data. Enriched with market metadata.

Request

GET /v2/onchain/markets/{condition_id}/oi

Parameter	Type	Location	Description
condition_id	string	path	Market condition ID (0x-prefixed, 64 hex chars)

Response

{
  "condition_id": "0x8180fee481707671aa45de84a9c3740ab607f3f2643b456e0380afb02d12cf7d",
  "source": "onchain",
  "found": true,
  "market": "Bitcoin Up or Down - March 28, 10:55AM-11:00AM ET",
  "slug": "btc-updown-5m-1774709700",
  "image": "https://polymarket-upload.s3.us-east-2.amazonaws.com/BTC+fullsize.png",
  "open_interest_usdc": 393.153937
}

Field	Type	Description
found	boolean	Whether the market was found onchain
market	string	Market question
slug	string	Market slug
image	string	Market image URL
open_interest_usdc	number	Current open interest in USDC

Example

curl "https://api.polynode.dev/v2/onchain/markets/0x8180fee481707671aa45de84a9c3740ab607f3f2643b456e0380afb02d12cf7d/oi" \
  -H "x-api-key: YOUR_KEY"

Path Parameters

condition_id · string · required

Market condition ID

Response

200

Open interest