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/api/sd/options/expiries
GETDegradedSTALE

Options by expiry

One row per expiry date: open interest, volume, put/call ratio, max pain, ATM IV and skew, for all venues or a single venue.

GET/api/sd/options/expiries
Degraded. The endpoint reports data quality STALE

Request

Query parameters

NameTypeRequiredDefaultAllowed valuesDescription
coinstringRequired——Coin symbol, case-insensitive (for example `BTC`). Missing or malformed values return 400. Example: BTC
exchangestringOptionalallall, deribit, binance, bybit, okx, gate, coincallOne venue, or `all` for the cross-venue aggregate.

Example request

curl -s "https://www.coinboss.com/api/sd/options/expiries?coin=BTC"

Response fields

The field table is generated from real responses, so it lists exactly what the endpoint returns. Paths use a[] for array items and {*} for objects keyed by a dynamic name such as a coin or an exchange.

FieldTypeUnitDescription
successboolean—true when the request succeeded. On failure the body is `{ success: false, code, error, request_id }`.
schemastring—Schema id of this response. It changes only when an existing field changes meaning or type.
nownumbermsServer time when the response was built.
coinstring—Coin symbol (upper case).
exchangestring—Exchange id (lower case).
n_expiriesnumber—Number of expiry dates included.
n_contractsnumber—Number of option contracts included.
oi_usdnumberUSDOpen interest as USD notional: coin quantity × spot index price. One-sided.
call_oi_usdnumberUSDCall open interest, USD notional.
put_oi_usdnumberUSDPut open interest, USD notional.
oi_coinnumbercoinOpen interest in units of the underlying coin.
call_oi_coinnumbercoinCall open interest in units of the underlying coin.
put_oi_coinnumbercoinPut open interest in units of the underlying coin.
vol_usd_24hnumberUSD24h notional volume: traded coin quantity × current spot index price. Not premium turnover.
call_vol_usd_24hnumberUSD24h notional volume of calls.
put_vol_usd_24hnumberUSD24h notional volume of puts.
vol_coin_24hnumbercoin24h traded quantity in units of the underlying coin.
call_vol_coin_24hnumbercoin24h traded quantity of calls, in coin.
put_vol_coin_24hnumbercoin24h traded quantity of puts, in coin.
vol_premium_usd_24hnumberUSD24h premium turnover (option price × quantity) where the venue publishes it; `null` elsewhere. Never added to notional volume.
pcr_oinumberratioPut open interest ÷ call open interest, in coin units; `null` when the call side is 0.
pcr_volnumberratioPut 24h volume ÷ call 24h volume, in coin units; `null` when the call side is 0.
atm_iv_30dnumber%ATM IV interpolated linearly to a constant 30-day maturity; `null` when 30 days is not bracketed by two expiries.
expiriesarray—One row per expiry date.
expiries[]object—One row per expiry date.
expiries[].expirystring—Expiry date (UTC), `YYYY-MM-DD`, or `all`.
expiries[].expiry_tsnumbermsExpiry time.
expiries[].days_leftnumberdaysDays until expiry.
expiries[].exchangesarray—Venues included in this row.
expiries[].exchanges[]string—Venues included in this row.
expiries[].n_contractsnumber—Number of option contracts included.
expiries[].oi_usdnumberUSDOpen interest as USD notional: coin quantity × spot index price. One-sided.
expiries[].call_oi_usdnumberUSDCall open interest, USD notional.
expiries[].put_oi_usdnumberUSDPut open interest, USD notional.
expiries[].oi_coinnumbercoinOpen interest in units of the underlying coin.
expiries[].call_oi_coinnumbercoinCall open interest in units of the underlying coin.
expiries[].put_oi_coinnumbercoinPut open interest in units of the underlying coin.
expiries[].vol_usd_24hnumberUSD24h notional volume: traded coin quantity × current spot index price. Not premium turnover.
expiries[].call_vol_usd_24hnumberUSD24h notional volume of calls.
expiries[].put_vol_usd_24hnumberUSD24h notional volume of puts.
expiries[].vol_coin_24hnumbercoin24h traded quantity in units of the underlying coin.
expiries[].call_vol_coin_24hnumbercoin24h traded quantity of calls, in coin.
expiries[].put_vol_coin_24hnumbercoin24h traded quantity of puts, in coin.
expiries[].vol_premium_usd_24hnumber|nullUSD24h premium turnover (option price × quantity) where the venue publishes it; `null` elsewhere. Never added to notional volume.
expiries[].pcr_oinumberratioPut open interest ÷ call open interest, in coin units; `null` when the call side is 0.
expiries[].pcr_volnumberratioPut 24h volume ÷ call 24h volume, in coin units; `null` when the call side is 0.
expiries[].oi_share_pctnumber%Share of the total open interest (USD notional) of the selection.
expiries[].max_painnumberUSDStrike at which the total payout to option holders at expiry is smallest.
expiries[].max_pain_usdnumberUSDTotal payout to option holders if the expiry settled at the max-pain strike.
expiries[].atm_ivnumber%At-the-money implied volatility: mean mark IV at the strike closest to the forward price.
expiries[].atm_strikenumberUSDStrike closest to the forward price, used for ATM IV.
expiries[].skew_25dnumber|nullpercentage pointsIV of the put with delta closest to −0.25 minus IV of the call with delta closest to +0.25. Venue-published deltas only.
expiries[].skew_exchangesarray—Venues whose deltas were available for the skew.
expiries[].skew_exchanges[]string—Venues whose deltas were available for the skew.
expiries[].index_pricenumberUSDSpot index price used for USD conversion (median of the venues' own index prices in aggregates).
expiries[].underlying_pricenumber|nullUSDForward / underlying price published by the venue for this expiry.
expiries[].by_exchange_ivarray—ATM IV of this expiry per venue.
expiries[].by_exchange_iv[]object—ATM IV of this expiry per venue.
expiries[].by_exchange_iv[].exchangestring—Exchange id (lower case).
expiries[].by_exchange_iv[].atm_ivnumber%At-the-money implied volatility: mean mark IV at the strike closest to the forward price.
expiries[].by_exchange_iv[].atm_strikenumberUSDStrike closest to the forward price, used for ATM IV.
expiries[].by_exchange_iv[].ref_pricenumberUSDForward price the venue's ATM strike was chosen against.
expiries[].by_exchange_iv[].skew_25dnumber|nullpercentage pointsIV of the put with delta closest to −0.25 minus IV of the call with delta closest to +0.25. Venue-published deltas only.
expiries[].by_exchange_iv[].oi_usdnumberUSDOpen interest as USD notional: coin quantity × spot index price. One-sided.
coverageobject—What is and is not included in the numbers. Compare this before comparing totals with another source.
coverage.included_exchangesarray—Sources whose fresh data is included.
coverage.included_exchanges[]string—Sources whose fresh data is included.
coverage.unavailablearray—Sources that could not be included, each with a reason. They are never counted as 0.
coverage.unavailable[]object—Sources that could not be included, each with a reason. They are never counted as 0.
coverage.unavailable[].exchangestring—Exchange id (lower case).
coverage.unavailable[].reasonstring—Machine-readable reason code.
coverage.unavailable[].detailstring—Human-readable explanation of the reason.
coverage.stale_excludedarray—Rows left out because their last update is outside the fresh window. empty in the samples used to generate this table
coverage.field_gapsarray—Columns a venue does not publish; they are `null` for that venue.
coverage.field_gaps[]object—Columns a venue does not publish; they are `null` for that venue.
coverage.field_gaps[].exchangestring—Exchange id (lower case).
coverage.field_gaps[].fieldsarray—Names of the missing columns.
coverage.field_gaps[].fields[]string—Names of the missing columns.
coverage.field_gaps[].kindstring—Contract family: `inverse` (coin-settled) or `linear` (stablecoin-settled).
methodobject—Plain-text statement of the formulas used for this response, one entry per field.
method.oi_usdstring—Formula note for `oi_usd`, plain text.
method.vol_usd_24hstring—Formula note for `vol_usd_24h`, plain text.
method.vol_premium_usd_24hstring—Formula note for `vol_premium_usd_24h`, plain text.
method.pcr_oistring—Formula note for `pcr_oi`, plain text.
method.pcr_volstring—Formula note for `pcr_vol`, plain text.
method.max_painstring—Formula note for `max_pain`, plain text.
method.atm_ivstring—Formula note for `atm_iv`, plain text.
method.atm_iv_30dstring—Formula note for `atm_iv_30d`, plain text.
method.skew_25dstring—Formula note for `skew_25d`, plain text.
method.expirystring—Formula note for `expiry`, plain text.
method.oi_share_pctstring—Formula note for `oi_share_pct`, plain text.
metaobject—Lineage and freshness of this response.
meta.schemastring—Schema id of this response. It changes only when an existing field changes meaning or type.
meta.sourcearray—Upstream public endpoints the data was collected from.
meta.source[]object—Upstream public endpoints the data was collected from.
meta.source[].exchangestring—Exchange id (lower case).
meta.source[].endpointstring—Public endpoint of the source the collector reads (shown for lineage; clients never call it).
meta.observed_atnumbermsTimestamp given by the source for the data.
meta.received_atnumbermsTime the CoinBoss collector received the data.
meta.fetched_atnumbermsTime this response was assembled.
meta.windowstring—Time window the numbers cover.
meta.qualitystring—FRESH, PARTIAL, STALE, BROKEN or UNAVAILABLE, judged from data timestamps and coverage.
meta.is_staleboolean—True when the data is older than its fresh window.
meta.cache_ttl_snumbersCache lifetime of this response.
meta.fallbackstring—What the endpoint returns when the collector or a source fails.

Generated 2026-11-11 23:00 UTC from 3 real responses.

Example response

/api/sd/options/expiries?coin=BTC · Real response captured 2026-11-13 01:37:53 UTC. Long arrays and maps are shortened for display: expiries had 12 items; meta.source had 6 items; coverage.field_gaps had 4 items; coverage.unavailable had 12 items; coverage.stale_included had 6 items; expiries[].by_exchange_iv had 6 items.

  • {
    • "success": true,
    • "schema": "coinboss.sd.options/1",
    • "now": 1794533873619,
    • "coin": "BTC",
    • "exchange": "all",
    • "n_expiries": 12,
    • "n_contracts": 5792,
    • "oi_usd": 32670143083.84,
    • "call_oi_usd": 18276964561.96,
    • "put_oi_usd": 14393178521.88,
    • "oi_coin": 457419.65,
    • "call_oi_coin": 255899.54,
    • "put_oi_coin": 201520.11,
    • "vol_usd_24h": 4295495191.7,
    • "call_vol_usd_24h": 2031780368.24,
    • "put_vol_usd_24h": 2263714823.46,
    • "vol_coin_24h": 60122.56,
    • "call_vol_coin_24h": 28436.77,
    • "put_vol_coin_24h": 31685.79,
    • "vol_premium_usd_24h": 34033631.12,
    • "pcr_oi": 0.7875,
    • "pcr_vol": 1.1143,
    • "atm_iv_30d": 37.2,
    • "expiries": [
      • { … 30 },
      • { … 30 }
      ],
    • "coverage": {
      • "included_exchanges": [ … 6 ],
      • "unavailable": [ … 2 ],
      • "stale_excluded": [],
      • "field_gaps": [ … 2 ],
      • "stale_included": [ … 2 ]
      },
    • "method": {
      • "oi_usd": "sum over contracts of oi_coin x that exchange's spot index price (USDT/USDC treated 1:1 as USD); oi_coin is open interest in units of the underlying coin after …",
      • "vol_usd_24h": "NOTIONAL 24h volume = sum of vol_coin (24h traded quantity in underlying coin) x the exchange's CURRENT spot index price; not premium turnover. Binance statisti…",
      • "vol_premium_usd_24h": "PREMIUM turnover (option price x quantity) as reported by the exchange: Deribit volume_usd, Binance amount, Gate sum(|size| x multiplier x price) from the 24h t…",
      • "pcr_oi": "put open interest / call open interest, both in underlying-coin units; null when call side is 0 or missing",
      • "pcr_vol": "put 24h volume / call 24h volume, both in underlying-coin units; null when call side is 0 or missing",
      • "max_pain": "per expiry: settlement price S among strikes with OI>0 minimizing pain_usd(S) = sum_calls oi_coin x max(S-K,0) + sum_puts oi_coin x max(K-S,0); ties take the lo…",
      • "atm_iv": "per exchange and expiry: reference price F = median of the exchange-published forward/underlying price of that expiry (the exchange index price where no forward…",
      • "atm_iv_30d": "30-day constant-maturity ATM IV: linear interpolation in days between the two expiries bracketing 30 days; null when 30 days is not bracketed",
      • "skew_25d": "IV(put with delta closest to -0.25, within +-0.10) - IV(call with delta closest to +0.25, within +-0.10), in percentage points, using exchange-published deltas …",
      • "expiry": "UTC date of the expiry timestamp (all integrated exchanges expire at 08:00 UTC); contracts from different exchanges with the same UTC expiry date are merged",
      • "oi_share_pct": "expiry oi_usd / total oi_usd of this response x 100"
      },
    • "meta": {
      • "schema": "coinboss.sd.options/1",
      • "source": [ … 2 ],
      • "observed_at": 1794522472654,
      • "received_at": 1794522473814,
      • "fetched_at": 1794533873619,
      • "window": "latest",
      • "quality": "STALE",
      • "is_stale": true,
      • "cache_ttl_s": 60,
      • "fallback": "on collector failure the last stored rows are served: an exchange whose newest batch is older than 25 min (collector cycle is 10 min) is excluded from totals (l…"
      }
    }

Verified samples

Besides the example above, the probe calls this endpoint with these parameters and checks the schema each time.

ParametersHTTPLatencyResult
coin=ETH&exchange=deribit20040 msPass STALE
coin=SOL20021 msPass STALE
coin=BTC&exchange=nope4001 msPass returns the expected error

Checked 2026-11-13 01:28:16 UTC

Details

Authentication
None. Public endpoint.
Rate limit
1200 requests per minute per IP
Server cache
60s
Edge micro-cache
10s
Update frequency
Collector round every 10 minutes; a venue is fresh for 25 minutes after its last successful round.
Window
Latest snapshot per expiry; volume fields cover the trailing 24 hours.
Data sources
Public REST option endpoints of Deribit, Binance, Bybit, OKX, Gate and Coincall, collected and stored by CoinBoss (sd_opt_latest, sd_opt_summary_hourly). No third-party aggregator is involved.
Exchange coverage
Six option venues. A coin that has no listed options on the selected venues returns HTTP 200 with null fields, `meta.quality = "UNAVAILABLE"` and the reason under `coverage.unavailable`. Venues without a public option feed are listed there as well.
Sorting
Expiry date ascending.
Units
USD notional = contracts × contract size × spot index price of the venue. `*_coin` fields are in units of the underlying coin. Implied volatility is in percent (55 = 55 %). `vol_premium_usd_24h` is premium turnover, reported separately and never added to notional volume.
Method
Contracts of different venues are grouped by UTC expiry date. Max pain and ATM IV are computed per expiry; `oi_share_pct` is the share of that expiry in the total open interest of the selection.
Timestamps
Unix epoch milliseconds (UTC) unless the field description says otherwise
Response format
json
Stability
Stable
Available since
2026-11-11

Live status

DegradedChecked 2026-11-13 01:37:53 UTCHTTP 20052 msSchema matchesNewest data point 3.2h old

The endpoint reports data quality STALE

Availability, last 30 days

100% of 379 checks passed

Schema drift detected by the last probe
  • Returned but not documented: coverage.stale_included, coverage.stale_included[], coverage.stale_included[].exchange, coverage.stale_included[].age_s

Errors

Failed calls share one shape on every endpoint. The full list is on the errors page. Errors and rate limits →

CodeHTTPMeaningWhat to do
INVALID_PARAM400A required parameter is missing or a value is not accepted. `param` names the parameter when it is known.Do not retry unchanged; fix the request.
UNAUTHORIZED401The `CB-API-KEY` header was sent but the key is unknown or revoked. Public data needs no key — drop the header or use a valid key.Do not retry unchanged.
FORBIDDEN403The route is not part of the public API (internal or account-only).Do not retry.
NOT_FOUND404Unknown route, or the requested coin / exchange / fund does not exist.Do not retry; check the path and identifiers against the catalog.
RATE_LIMITED429More requests than the per-minute limit. `Retry-After` gives the seconds to wait.Wait for `Retry-After`, then retry with backoff.
INTERNAL500Unexpected server error. The message is generic by design; quote `request_id` when reporting it.Retry once after a few seconds; report it with the request id if it persists.
UPSTREAM_FAILED503The data source behind this endpoint did not answer in time. No stale or substitute numbers are returned in its place.Retry with backoff; check the status page.
UNAVAILABLE501 / 503The dataset is temporarily not ready (cache warming) or the endpoint has no lawful public source yet.Retry later; the catalog marks endpoints that are unavailable by design.
REQUEST_FAILED200Some older endpoints answer HTTP 200 with `success: false`. Always check `success`, not only the HTTP status.Depends on the message; treat as a failed request.

Try it

GET/api/sd/options/expiriesDegraded
Parameters

string — Coin symbol, case-insensitive (for example `BTC`). Missing or malformed values return 400.

string · default all — One venue, or `all` for the cross-venue aggregate.

Request URLhttps://www.coinboss.com/api/sd/options/expiries?coin=BTC
Choose an endpoint and press “Send request”. The response, headers and timing will appear here.