> ## 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 > **Available from 27 August 2026, 07:00 UTC.** 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. 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: >- **Available from 27 August 2026, 07:00 UTC.** 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. 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 greater than 0 and at most 100, with at most 2 decimal places. 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 ````