Crypto Options Max Pain & Open Interest API
Where the crypto options market is positioned, and the strike toward which an expiry's open interest exerts the most "pain" — computed live from Deribit's public option book, no key, nothing stored. Max pain is the strike at which the total value of all open options is lowest at expiry: the price at which the greatest dollar amount of option open interest expires worthless and option writers keep the most premium. Traders watch it because price often gravitates toward max pain into a large expiry. The maxpain endpoint takes a currency (BTC, ETH, SOL, XRP) and an expiry and returns the max-pain strike, the spot/underlying, how far spot sits from max pain, and the call and put open-interest totals with the put/call OI ratio. The oi endpoint returns the full open-interest-by-strike distribution for an expiry — which strikes hold the most open interest, the magnets and walls (support & resistance) traders watch. The expiries endpoint lists every listed expiry with its aggregate open interest, contract count and call/put split. This is the aggregate options-positioning / max-pain analytics cut for crypto — distinct from the raw per-contract option chain (greeks/IV), from US equity options and from the crypto-volatility APIs in the catalogue. Currency is BTC, ETH, SOL or XRP; expiry is a Deribit code like 26JUN26.
api.oanor.com/maxpain-api
