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

# Settlement Calendar

> Return the settlement calendar entry used to resolve the dated future for a futures-based QFEX product at a given time. This is the source of truth for oracle roll state for symbols such as CL-USD, US100-USD, COPPER-USD, and NATGAS-USD. If `time` is omitted, the currently active contract is returned.



## OpenAPI

````yaml /api-reference/openapi.yaml get /settlement-calendar
openapi: 3.1.0
info:
  contact:
    email: support@qfex.com
    name: QFEX Support
  description: REST API for QFEX
  license:
    name: QFEX License
    url: https://qfex.com/license
  title: QFEX REST API
  version: 0.1.0
servers:
  - description: Production server
    url: https://api.qfex.com
security: []
paths:
  /settlement-calendar:
    get:
      tags:
        - market-data
      summary: Settlement Calendar
      description: >-
        Return the settlement calendar entry used to resolve the dated future
        for a futures-based QFEX product at a given time. This is the source of
        truth for oracle roll state for symbols such as CL-USD, US100-USD,
        COPPER-USD, and NATGAS-USD. If `time` is omitted, the currently active
        contract is returned.
      operationId: read-settlement-calendar
      parameters:
        - explode: false
          in: query
          name: symbol
          required: true
          description: >-
            QFEX symbol to resolve, for example `CL-USD`, `US100-USD`,
            `COPPER-USD`, or `NATGAS-USD`.
          schema:
            example: CL-USD
            type: string
        - explode: false
          in: query
          name: time
          description: >-
            Optional timestamp to resolve against the settlement calendar. If
            omitted, QFEX returns the currently active dated future.
          schema:
            example: '2026-04-14T00:00:00Z'
            format: date-time
            type: string
      responses:
        '200':
          content:
            application/json:
              examples:
                example:
                  summary: Example settlement calendar entry
                  value:
                    $schema: https://api.qfex.com/schemas/SettlementCalendarEntry.json
                    expiration: '2026-04-21T21:30:00Z'
                    active_until: '2026-04-13T21:30:00Z'
                    future_symbol: CLK6
                    qfex_symbol: CL-USD
              schema:
                $ref: '#/components/schemas/SettlementCalendarEntry'
          description: OK
        default:
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorModel'
          description: Error
      security: []
components:
  schemas:
    SettlementCalendarEntry:
      additionalProperties: false
      properties:
        $schema:
          description: A URL to the JSON Schema for this object.
          examples:
            - https://api.qfex.com/schemas/SettlementCalendarEntry.json
          format: uri
          readOnly: true
          type: string
        active_until:
          description: >-
            Last timestamp at which this dated future remains active for oracle
            and settlement purposes for the QFEX symbol.
          examples:
            - '2026-04-13T21:30:00Z'
          format: date-time
          type: string
        expiration:
          description: Expiration timestamp of the underlying dated future contract.
          examples:
            - '2026-04-21T21:30:00Z'
          format: date-time
          type: string
        future_symbol:
          description: >-
            Dated futures contract used for pricing, for example `CLK6` or
            `NQM6`.
          examples:
            - CLK6
          type: string
        qfex_symbol:
          description: QFEX perpetual symbol whose oracle references the dated future.
          examples:
            - CL-USD
          type: string
      required:
        - expiration
        - active_until
        - future_symbol
        - qfex_symbol
      type: object
    ErrorModel:
      additionalProperties: false
      properties:
        $schema:
          description: A URL to the JSON Schema for this object.
          examples:
            - https://api.qfex.com/schemas/ErrorModel.json
          format: uri
          readOnly: true
          type: string
        detail:
          description: >-
            A human-readable explanation specific to this occurrence of the
            problem.
          examples:
            - Property foo is required but is missing.
          type: string
        errors:
          description: Optional list of individual error details
          items:
            $ref: '#/components/schemas/ErrorDetail'
          type:
            - array
            - 'null'
        instance:
          description: >-
            A URI reference that identifies the specific occurrence of the
            problem.
          examples:
            - https://example.com/error-log/abc123
          format: uri
          type: string
        status:
          description: HTTP status code
          examples:
            - 400
          format: int64
          type: integer
        title:
          description: >-
            A short, human-readable summary of the problem type. This value
            should not change between occurrences of the error.
          examples:
            - Bad Request
          type: string
        type:
          default: about:blank
          description: A URI reference to human-readable documentation for the error.
          examples:
            - https://example.com/errors/example
          format: uri
          type: string
      type: object
    ErrorDetail:
      additionalProperties: false
      properties:
        location:
          description: >-
            Where the error occurred, e.g. 'body.items[3].tags' or
            'path.thing-id'
          type: string
        message:
          description: Error message text
          type: string
        value:
          description: The value at the given location
      type: object

````