> ## Documentation Index
> Fetch the complete documentation index at: https://docs.deribit.com/llms.txt
> Use this file to discover all available pages before exploring further.

# FIX API Changelog

> Release notes for the Deribit FIX API covering new tags, message changes, session behavior updates, and backward-compatibility announcements.

<Update label="Release 27.06.2026">
  `Security List` (`y`): `UnderlyingSecurityType` (`310`) is now included in the response for all instruments. Possible values: `CRYPTO`, `COMMODITY`, `EQUITY`.
</Update>

<Update label="Release 17.02.2026">
  `Execution Reports` (`8`): added nonmandatory tag `CashOrderQty` (`152`) to differentiate value based orders from quantity based orders. For value based orders (BTC & ETH inverse futures and perpetuals where the order size is specified as a USD amount), both `OrderQty` (`38`) and `CashOrderQty` (`152`) are present and equal. For quantity based orders, `CashOrderQty` is absent.
</Update>

<Update label="Release 07.10.2025">
  Removed deprecated RFQ messages as previously announced.

  * Removed Quote Request (R)
  * Removed Quote Request Reject (AG)
  * Removed Quote Status Report (AI)
  * Removed RFQ Request (AH)
</Update>

<Update label="Release 10.06.2025">
  * `MaxShow` (`210`) is replaced with `DisplayQty` (`1138`). The iceberg orders cannot be fully invisible anymore. Setting `DisplayQty` (`1138`) = 0 is interpreted as no hidden volume, i.e. the full order quantity is displayed to the market. Omitting the field gives the same result.
  * `Execution Reports` (`8`): added nonmandatory tag `RefreshQty` (`1088`).
</Update>

<Update label="Release 06.03.2025">
  Support for non-printable ASCII characters (such as control characters ranging from 0x00 to 0x1F) in string values has been removed to ensure compliance with the WS/REST API. Attempting to use non-printable ASCII characters will now result in a decoding error.
</Update>

<Update label="Release 04.02.2025">
  * `Order Cancel/Replace Request` (`G`): removed support of undocumented tag `MaxShow` (`210`) in compliance with the WS/REST API.
  * `Order Mass Status Request` (`AF`): added the `History` (`10`) value of the `MassStatusReqType` (`585`) tag for retrieving history of orders that have been partially or fully filled; added optional tags `OrderHistoryIncludeUnfilled` (`9037`), `OrderHistoryOffset` (`9039`) and `TotNumReports` (`911`).
</Update>

<Update label="Release 03.09.2024">
  `New Order Single` (`D`) and `Order Cancel/Replace Request` (`G`) once again support `QtyType=Units`, allowing the `OrderQty` to be sent in units (amount) instead of contracts.
</Update>

<Update label="Release 08.08.2024">
  `Order Mass Cancel Request` (`q`): added `FreezeQuotes` (`9031`) tag.
</Update>

<Update label="Release 03.07.2024">
  * `Mass Quote Acknowledgement` (`b`): added more values of `QuoteEntryStatus` (`1167`): `18 = Canceled by MM`, `19 = Replaced`, `20 = Filled`, `21 = Open`, `22 = Closed`, `23 = Triggered`, `24 = Untriggered`, `25 = Unknown`.
  * `MMProtection Limits` (`MM`): added `ProtectionVegaLimit` (`20118`).
</Update>

<Update label="Release 04.06.2024">
  * `New Order Single` (`D`): added nonmandatory tag `ValidUntilTime` (`62`).
  * `Order Cancel/Replace Request` (`G`): added nonmandatory tag `ValidUntilTime` (`62`).
  * `Mass Quote` (`i`): added nonmandatory tag `ValidUntilTime` (`62`).
  * `Execution Reports` (`8`): added nonmandatory tags `IsLiquidation` (`9034`), `IsRebalance` (`9035`) and `IsRiskReducing` (`9036`).
  * `SecurityListRequest` (`x`): added `Currency`, `SecurityType` and `SecondaryCurrency`.
</Update>

<Update label="Release 09.03.2024">
  * `SecurityStatusRequest` (`e`): added subscription.
  * `SecurityStatus` (`f`): added `Text` field.
  * Changed scope for `MMProtection Limits` (`MM`) from `account` to `trade`.
</Update>

<Update label="Release 13.02.2024">
  * Added `Mass Quote` (`i`).
  * Added `Mass Quote Acknowledgement` (`b`).
  * `Execution Reports` (`8`): added nonmandatory tags `MMPGroup` (`9019`), `QuoteSetID` (`302`), `QuoteID` (`117`) and `QuoteEntryID` (`299`) related to Mass Quoting.
  * Added `Quote Cancel` (`Z`).
  * `Mass Cancel Report` (`r`): added one more type for `MassCancelRequestType`; added an optional field `QuoteCancelType` for mass cancel reports generated by `Quote Cancel` (`Z`); `ClOrdID` is no longer a required tag.
  * `MMProtection Reset` (`MZ`) and `MMProtection Limits` (`MM`): added optional `MMPGroup`.
</Update>

<Update label="Release 12.12.2023">
  Fixed an issue where `Reject` (`3`) was incorrectly returned instead of `OrderCancelReject` (`9`), with the specified `ClOrdID`, `DeribitLabel`, or `OrigClOrdId`, in response to an `Order Cancel Request` (`F`).
</Update>

<Update label="Release 02.11.2023">
  `User Request` (`BE`): added `CROSS` as currency.
</Update>

<Update label="Release 27.09.2023">
  `DeribitLiquidation` is hidden from the public for the first hour after the trade (to prevent abusing).
</Update>

<Update label="Release 06.07.2023">
  Changed `MMProtectionLimits` and `MMProtectionReset` to work with a currency pair instead of a single currency.
</Update>

<Update label="Release 13.06.2023">
  * Added fields `NoTickRules` (`1205`), `StartTickPriceRange` (`1206`) and `TickIncrement` (`1208`) to the instrument for tick size steps.
  * Added option `DisplayIncrementSteps` (`9018`) to `Logon` and `Security List Request` (`x`) so the client can enable receiving the above-mentioned new fields in the instrument.
</Update>

<Update label="Release 09.06.2023">
  Added the following messages: `TradeCaptureReportRequest` (`AD`), `TradeCaptureReportRequestAck` (`AQ`) and `TradeCaptureReport` (`AE`). Clients can now utilize these to subscribe for receiving reports on their own trades.
</Update>

<Update label="Release 21.03.2023">
  * Added the possibility to search closed orders by `ClOrdID` or `DeribitLabel` via `OrderMassStatusRequest`.
  * Incremental refresh for indices now has 1 entry instead of 2.
  * BTC-DVOL and ETH-DVOL are renamed in compliance with other indices: `BTCDVOL_USDC-DERIBIT-INDEX`, `ETHDVOL_USDC-DERIBIT-INDEX`.
</Update>

<Update label="Release 16.02.2023">
  * `SecurityList` (`y`): added new value `FXSPOT` of `SecurityType` for the currency exchange spot market.
  * `SecurityList` (`y`): added `PriceQuoteCurrency` (`1524`).
</Update>

<Update label="Release 13.10.2022">
  Documentation alignment.
</Update>

<Update label="Release 30.03.2022">
  * Added `Security Definition Request` (`c`).
  * Added `Security Definition` (`d`).
  * Added `Quote Request` (`R`).
  * Added `Quote Request Reject` (`AG`).
  * Added `Quote Status Report` (`AI`).
  * Added `RFQ Request` (`AH`).
</Update>

<Update label="Release 21.12.2021">
  * `MarketData Request` (`V`): added `DeribitShowBlockTradeId` (`9012`).
  * `MarketData` (`W`) and (`X`): added `TrdMatchID` (`880`) as block trade ID.
</Update>

<Update label="Release 13.10.2021">
  `MarketData Request` (`V`): added `DeribitSkipBlockTrades` (`9011`).
</Update>

<Update label="Release 10.08.2021">
  Added the possibility to use the client's `ClOrdID` and `DeribitLabel` in `Order Cancel Request` (`F`), `Order Mass Cancel Request` (`q`) and `Order Cancel/Replace Request` (`G`) without an exchange-generated `OrigClOrdID` (equivalent of REST/WS `cancel_by_label` etc.).
</Update>

<Update label="Release 14.07.2021">
  * Added `Sequence Reset` (`4`).
  * `Security List Request` (`x`): added `SubscriptionRequestType` (`263`) — the possibility to get notifications about new or terminated instruments.
  * `SecurityList` (`y`): added `SecurityStatus` (`965`) in the notifications.
</Update>

<Update label="Release 18.03.2021">
  `Logon` (`A`): added custom tag `ConnectionOnlyExecutionReports` (`9010`).
</Update>

<Update label="Release 01.03.2021">
  `Order Cancel/Replace Request` (`G`): adjusted behavior for MMP orders when the `DeribitMMProtection` (`9008`) flag is not specified.
</Update>

<Update label="Release 11.12.2020">
  * `SecurityList` (`y`): added Deribit Volatility Index instruments: BTC-VIX, ETH-VIX.
  * `MarketData Request` (`V`): added requests for the Deribit Volatility Index.
</Update>

<Update label="Release 22.06.2020">
  * Added `MMProtection Limits` (`MM`).
  * Added `MMProtection Limits Result/Reject` (`MR`).
  * Added `MMProtection Reset` (`MZ`).
  * `New Order Single` (`D`): added nonmandatory `DeribitMMProtection` (`9008`).
  * `Order Cancel/Replace Request` (`G`): added nonmandatory `DeribitMMProtection` (`9008`).
  * `Execution Reports` (`8`): added nonmandatory `DeribitMMProtection` (`9008`).
</Update>

<Update label="Release 21.05.2020">
  * `Logon` (`A`): added custom tag `DeribitSequential` (`9007`).
  * `Execution Reports` (`8`): added `SecondaryExecID`, which is the ID of the last change of the order.
</Update>

<Update label="Release 26.03.2020">
  * FIX parameter `9003` `DontCancelOnDisconnect` has been added to disable 'Cancel On Disconnect' actions.
  * A `Security Status Request` has been added, with a response message of `Security Status`.
</Update>

<Update label="Release 17.01.2020">
  Added `SecurityStatusRequest` (`e`) request and `SecurityStatus` (`f`) response.
</Update>


## Related topics

- [Starbase API Changelog](/changelogs/starbase.md)
- [JSON-RPC API Changelog](/changelogs/jsonrpc.md)
- [Logon(A) — Production FIX API](/fix-api/production/logon.md)
- [Logout(5) — Production FIX API](/fix-api/production/logout.md)
- [FIX Drop Copy API](/starbase/fix-drop-copy-api.md)