> ## Documentation Index > Fetch the complete documentation index at: https://docs.kraken.com/llms.txt > Use this file to discover all available pages before exploring further. # Set the off-book max leverage cap > Sets the account-level off-book maximum leverage cap for the authenticated master account and returns the stored value. The cap limits the effective leverage (gross open-position notional / margin equity) the account is willing to reach through off-book fills — liquidation assignments and RFQ offer fills. Book (maker/taker) orders are never affected. Setting the cap to `0` leaves no leverage budget, so the account takes no exposure-increasing off-book fill at all: it is the single switch to opt out of assignments and RFQ fills without withdrawing each assignment preference individually. Fills that reduce the account's gross open-position notional still go through, so opting out never traps the account in its existing exposure. Only master accounts may call this endpoint. Calling it can result in the following error codes: invalidArgument: `maxLeverage` is missing or not a number rfqAssignmentMaxLeverageOutOfBounds: `maxLeverage` is outside `[0, 100]`, or has more than 2 decimal places rfqAssignmentMaxLeverageDisabled: the off-book max leverage feature is not enabled ## OpenAPI ````yaml /openapi/futures-rest.yaml put /rfq-assignment/max-leverage openapi: 3.1.0 info: title: Kraken Futures Trading API version: v3 description: Market data and order management endpoints. servers: - url: https://futures.kraken.com/derivatives/api/v3 description: Kraken Futures x-kfOnly: true security: [] tags: - name: Multi-Collateral description: Endpoints pertaining to the multi-collateral (MC) futures markets. - name: Instrument Details description: >- - The `/instruments/status` endpoint provides a list of statuses for all instruments. - The `/instruments/{symbol}/status` endpoint provides the status of a single instrument. - name: Account Information - name: Assignment Program - name: Fee Schedules description: >- **DEPRECATED** — Effective 2026-06-22, the fee values returned by these endpoints no longer reflect the fees actually charged on Futures trades. Futures fee calculation has been migrated to a centralised Kraken fee service. To determine the fee rate applied to your trades, use the Spot [`GetTradeVolume`](https://docs.kraken.com/api/docs/rest-api/get-trade-volume) endpoint authenticated with a Spot API key. - name: General - name: Historical Data - name: Historical Funding Rates - name: Market Data - name: Order Management - name: Trading Settings - name: Subaccounts - name: Transfers - name: RFQs paths: /rfq-assignment/max-leverage: put: tags: - Trading Settings summary: Set the off-book max leverage cap description: >- Sets the account-level off-book maximum leverage cap for the authenticated master account and returns the stored value. The cap limits the effective leverage (gross open-position notional / margin equity) the account is willing to reach through off-book fills — liquidation assignments and RFQ offer fills. Book (maker/taker) orders are never affected. Setting the cap to `0` leaves no leverage budget, so the account takes no exposure-increasing off-book fill at all: it is the single switch to opt out of assignments and RFQ fills without withdrawing each assignment preference individually. Fills that reduce the account's gross open-position notional still go through, so opting out never traps the account in its existing exposure. Only master accounts may call this endpoint. Calling it can result in the following error codes: invalidArgument: `maxLeverage` is missing or not a number rfqAssignmentMaxLeverageOutOfBounds: `maxLeverage` is outside `[0, 100]`, or has more than 2 decimal places rfqAssignmentMaxLeverageDisabled: the off-book max leverage feature is not enabled operationId: updateRfqAssignmentMaxLeverage parameters: - description: >- The off-book max leverage cap to set. Must be at least 0 and at most 100, with at most 2 decimal places. `0` blocks all exposure-increasing off-book fills. name: maxLeverage in: query required: true schema: type: number responses: '200': description: OK content: application/json: schema: oneOf: - title: Success Response allOf: - type: object properties: maxLeverage: type: - number - 'null' description: The stored off-book max leverage cap. required: - maxLeverage - $ref: '#/components/schemas/SuccessResponse' - $ref: '#/components/schemas/ErrorResponse' examples: success: $ref: '#/components/examples/GetRfqAssignmentMaxLeverageExample' security: - general-api-key: [] authent: [] components: schemas: SuccessResponse: allOf: - $ref: '#/components/schemas/ResultSuccess' - $ref: '#/components/schemas/ServerTime' ErrorResponse: allOf: - title: Errors type: object properties: errors: type: array items: $ref: '#/components/schemas/Error' error: $ref: '#/components/schemas/Error' required: - error - $ref: '#/components/schemas/ResultError' - $ref: '#/components/schemas/ServerTime' ResultSuccess: type: object properties: result: type: string enum: - success example: success required: - result ServerTime: type: object properties: serverTime: description: Server time in Coordinated Universal Time (UTC) type: string format: date-time example: '2020-08-27T17:03:33.196Z' required: - serverTime Error: type: string description: |- Error description. - `accountInactive`: The Futures account the request refers to is inactive - `apiLimitExceeded`: The API limit for the calling IP address has been exceeded - `authenticationError`: The request could not be authenticated - `insufficientFunds`: The amount requested for transfer is below the amount of funds available - `invalidAccount`: The Futures account the transfer request refers to is invalid - `invalidAmount`: The amount the transfer request refers to is invalid - `invalidArgument`: One or more arguments provided are invalid - `invalidUnit`: The unit the transfer request refers to is invalid - `Json Parse Error`: The request failed to pass valid JSON as an argument - `marketUnavailable`: The market is currently unavailable - `nonceBelowThreshold`: The provided nonce is below the threshold - `nonceDuplicate`: The provided nonce is a duplicate as it has been used in a previous request - `notFound`: The requested information could not be found - `requiredArgumentMissing`: One or more required arguments are missing - `Server Error`: There was an error processing the request - `Unavailable`: The endpoint being called is unavailable - `unknownError`: An unknown error has occurred enum: - accountInactive - apiLimitExceeded - authenticationError - insufficientFunds - invalidAccount - invalidAmount - invalidArgument - invalidUnit - Json Parse Error - marketUnavailable - nonceBelowThreshold - nonceDuplicate - notFound - requiredArgumentMissing - Server Error - Unavailable - unknownError ResultError: type: object properties: result: type: string enum: - error example: error required: - result examples: GetRfqAssignmentMaxLeverageExample: x-kfOnly: true value: result: success serverTime: '2022-06-28T15:01:12.762Z' maxLeverage: 10 securitySchemes: general-api-key: type: apiKey description: General API key with **full** access in: header name: APIKey x-inlineDescription: true authent: type: apiKey description: Authentication string in: header name: Authent x-inlineDescription: true ````