openapi: 3.0.3
info:
  title: QStash Dead Letter Queue Schedules API
  description: QStash is a serverless message queue and task scheduling REST API from Upstash that delivers HTTP messages to endpoints reliably without requiring any long-lived connections or infrastructure management. Built entirely on stateless HTTP requests, it is designed for serverless and edge runtimes where traditional message brokers are impractical. QStash supports automatic retries, CRON-based scheduling up to one year in advance, URL group broadcasting for fan-out delivery, FIFO queuing, dead-letter queues, and message deduplication.
  version: '2.0'
  contact:
    name: Upstash Support
    url: https://upstash.com/docs/qstash/overall/getstarted
  license:
    name: Upstash Terms of Service
    url: https://upstash.com/trust/terms.pdf
servers:
- url: https://qstash.upstash.io/v2
  description: QStash production API
security:
- BearerAuth: []
tags:
- name: Schedules
  description: Create and manage CRON-based scheduled messages
paths:
  /schedules/{destination}:
    post:
      operationId: createSchedule
      summary: Create or update a schedule
      description: Create a CRON-scheduled recurring message delivery. The Upstash-Cron header defines the schedule. Timezone support via CRON_TZ prefix.
      tags:
      - Schedules
      parameters:
      - name: destination
        in: path
        required: true
        description: Destination URL, URL Group name, or queue destination
        schema:
          type: string
      - name: Upstash-Cron
        in: header
        required: true
        description: CRON expression (e.g. "0 0 * * *"). Supports timezone prefix like "CRON_TZ=America/New_York 0 4 * * *"
        schema:
          type: string
      - name: Upstash-Schedule-Id
        in: header
        description: Specify or overwrite a schedule by ID
        schema:
          type: string
      - name: Upstash-Queue-Name
        in: header
        description: Route scheduled message to a named queue
        schema:
          type: string
      - name: Upstash-Retries
        in: header
        description: Number of retry attempts per scheduled delivery
        schema:
          type: integer
      - name: Upstash-Delay
        in: header
        description: Delay each delivery after the scheduled trigger time
        schema:
          type: string
      requestBody:
        description: Message payload to deliver on each scheduled invocation
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
            example:
              hello: world
      responses:
        '200':
          description: Schedule created or updated
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ScheduleResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /schedules:
    get:
      operationId: listSchedules
      summary: List all schedules
      description: Retrieve a list of all schedules configured for this account.
      tags:
      - Schedules
      responses:
        '200':
          description: List of schedules
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Schedule'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /schedules/{scheduleId}:
    get:
      operationId: getSchedule
      summary: Get a schedule
      description: Retrieve details of a specific schedule by ID.
      tags:
      - Schedules
      parameters:
      - name: scheduleId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Schedule details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Schedule'
        '404':
          $ref: '#/components/responses/NotFound'
    delete:
      operationId: deleteSchedule
      summary: Delete a schedule
      description: Permanently delete a schedule by ID.
      tags:
      - Schedules
      parameters:
      - name: scheduleId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Schedule deleted successfully
        '404':
          $ref: '#/components/responses/NotFound'
  /schedules/{scheduleId}/pause:
    post:
      operationId: pauseSchedule
      summary: Pause a schedule
      description: Pause an active schedule; no messages will be delivered while paused.
      tags:
      - Schedules
      parameters:
      - name: scheduleId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Schedule paused
        '404':
          $ref: '#/components/responses/NotFound'
  /schedules/{scheduleId}/resume:
    post:
      operationId: resumeSchedule
      summary: Resume a paused schedule
      description: Resume a previously paused schedule.
      tags:
      - Schedules
      parameters:
      - name: scheduleId
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Schedule resumed
        '404':
          $ref: '#/components/responses/NotFound'
components:
  responses:
    Unauthorized:
      description: Missing or invalid authentication token
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  schemas:
    Schedule:
      type: object
      properties:
        scheduleId:
          type: string
          description: Unique schedule identifier
        cron:
          type: string
          description: CRON expression defining the schedule
        destination:
          type: string
          description: Target URL or URL Group
        createdAt:
          type: integer
          description: Unix timestamp when the schedule was created
        paused:
          type: boolean
          description: Whether the schedule is currently paused
    ScheduleResponse:
      type: object
      properties:
        scheduleId:
          type: string
          description: Unique identifier for the created or updated schedule
          example: scd_2XavMmRcJHJf7HkNtNqjfVf8uQe
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: Human-readable error message
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: Bearer token obtained from the Upstash console at https://console.upstash.com/qstash. Alternatively, pass as query parameter `qstash_token`.
externalDocs:
  description: QStash Documentation
  url: https://upstash.com/docs/qstash/overall/getstarted