> ## Documentation Index > Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt > Use this file to discover all available pages before exploring further. # Calculate discount factors for curve maturity offsets. > Use this operation when a supplied discount curve must be evaluated between one start maturity and one or more end maturities. The calculation uses the curve embedded in the request and does not retrieve or modify persisted market data. Returned factors preserve the order of the requested end maturities. ## OpenAPI ````yaml /risk-and-pricing/atoti-risk-services/apis-endpoints/openapi/openapi.mintlify.json post /api/MarketData/GetDiscountFactors openapi: 3.0.4 info: title: Derivitec Api 1.0 version: '1.0' servers: - url: https://api.riskportal.activeviam.com security: - oauth2: [] - apikey: [] tags: - name: AdminUser - name: AtotiReport - name: AtotiSession - name: BloombergOAuth - name: Bond - name: BondYieldCurvePage - name: BookAccess - name: Books - name: Commodity - name: Counterparties - name: Currencies - name: Equity - name: EquityDividend - name: EquityPage - name: FeatureFlag - name: Fx - name: FxPage - name: GroupAccess - name: Home - name: LegacyPosition - name: MarketData - name: MarketDataProvider - name: MarketDataProviderAccess - name: Meta - name: Notification - name: Organisation - name: PnLReport - name: PortfolioAccess - name: Portfolios - name: Position - name: PositionFilter - name: PricingEnvironment - name: PricingEnvironmentAccess - name: RateAsset - name: RateAssetPage - name: Report - name: ReportDefinition - name: ReportHistoryLauncherQuery - name: ReportLauncher - name: ReportQuery - name: ReportQueryViewUser - name: ReportRestriction - name: ReportView - name: RiskReport - name: Tradable - name: TradeBooking - name: User - name: VarReport - name: VarReportQuery - name: YieldCurvePage paths: /api/MarketData/GetDiscountFactors: post: tags: - MarketData summary: Calculate discount factors for curve maturity offsets. description: >- Use this operation when a supplied discount curve must be evaluated between one start maturity and one or more end maturities. The calculation uses the curve embedded in the request and does not retrieve or modify persisted market data. Returned factors preserve the order of the requested end maturities. operationId: GetDiscountFactors requestBody: description: >- The calculation payload. `Curve` and the `EndMats` collection are required; `StartMat` and each end maturity are integer day offsets on the curve's maturity axis. content: application/json-patch+json: schema: $ref: '#/components/schemas/ApiGetDiscountFactorsRequest' application/json: schema: $ref: '#/components/schemas/ApiGetDiscountFactorsRequest' text/json: schema: $ref: '#/components/schemas/ApiGetDiscountFactorsRequest' application/*+json: schema: $ref: '#/components/schemas/ApiGetDiscountFactorsRequest' responses: '200': description: >- Returns one calculated discount factor for each requested end maturity. content: application/json: schema: $ref: '#/components/schemas/ApiGetDiscountFactorsResponse' '400': description: BadRequest '401': description: Unauthorized '403': description: Forbidden security: - oauth2: [] - apikey: [] components: schemas: ApiGetDiscountFactorsRequest: required: - $type type: object properties: curve: $ref: '#/components/schemas/DiscountCurve' start_mat: type: integer description: Start maturity as a day offset shared by the requested intervals. format: int32 end_mats: type: array items: type: integer format: int32 description: >- End maturities as day offsets for the requested factors, in result order. nullable: true $type: type: string enum: - >- Derivitec.Web.Core.MarketData.ApiGetDiscountFactorsRequest, Derivitec.Web.Core additionalProperties: false description: >- Requests discount factors from a supplied curve across maturity intervals. ApiGetDiscountFactorsResponse: required: - $type type: object properties: is_success: type: boolean description: >- Whether the operation completed successfully. The default is `true`; error outcomes set it to `false`. example: true error_messages: type: array items: type: string description: >- Messages explaining operation-level failures. The collection is empty by default. nullable: true factors: type: array items: type: number format: double description: >- One discount factor for each requested end maturity, in request order. nullable: true $type: type: string enum: - >- Derivitec.Web.Core.MarketData.ApiGetDiscountFactorsResponse, Derivitec.Web.Core additionalProperties: false description: Returns discount factors evaluated for the requested intervals. DiscountCurve: required: - $type type: object properties: provider_id: type: string description: >- Market-data provider code recorded as the source of the contribution. Defaults to Derivitec. nullable: true derivitec_created: type: string description: Timestamp at which the market-data record was created. derivitec_modified: type: string description: Optional timestamp of the record's latest modification. nullable: true uploaded_date_time: type: string description: >- Optional timestamp at which the contribution was uploaded. UploadRateAssets ignores the supplied value on each rate asset and stores the current UTC time. nullable: true derivitec_modified_by: type: string description: >- Principal recorded as the latest modifier. UploadRateAssets ignores the supplied value on each rate asset and stores the authenticated user identifier. nullable: true uploaded_by: type: string description: >- Principal recorded as the uploader. UploadRateAssets ignores the supplied value on each rate asset and stores the authenticated user identifier. nullable: true rolled: type: boolean description: Whether the contribution has been rolled. example: false currency: type: string description: Currency represented by the discount curve. nullable: true curve_name: type: string description: Name distinguishing the curve within its currency. nullable: true discount_factors: type: array items: type: number format: double description: Dimensionless discount factors paired by index with Maturities. nullable: true extrapolate: type: boolean description: >- Whether the curve may be evaluated beyond its supplied maturities; initialized to true. maturities: type: array items: type: integer format: int32 description: >- Maturities expressed as day offsets and paired by index with DiscountFactors. nullable: true value_date: type: string description: Curve value date. format: date-time $type: type: string enum: - Derivitec.Web.Core.MarketData.DiscountCurve, Derivitec.Web.Core additionalProperties: false description: >- Named currency discount curve represented by day-offset maturities and dimensionless discount factors. securitySchemes: oauth2: type: oauth2 description: >- OAuth2 access-token requested from AWS Cognito and provided as a Auth Bearer header flows: implicit: authorizationUrl: https://auth.riskportal.derivitec.com/oauth2/authorize scopes: {} apikey: type: apiKey description: API-Key requested via the site and provided as a header name: x-api-key in: header ````