> ## Documentation Index
> Fetch the complete documentation index at: https://vastai-80aa3a82-auto-openapi-update-666a1d71.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Schedule Machine Maintenance

> Schedules a maintenance window for a single machine and sends downtime warning emails to affected instance clients and a confirmation to the host.



## OpenAPI

````yaml /api-reference/openapi.yaml put /api/v0/machines/{machine_id}/dnotify
openapi: 3.1.0
info:
  title: Vast.ai API
  description: >-
    Vast.ai REST API for managing GPU cloud instances, machine operations, and
    AI/ML workflows.


    ## AI Agent Quick-Start


    Install the CLI skill for your agent (Claude Code, Cursor, Windsurf, etc.):
      npx skills add vast-ai/vast-cli

    CLI reference:
    https://raw.githubusercontent.com/vast-ai/vast-cli/master/vastai/SKILL.md

    SDK reference:
    https://raw.githubusercontent.com/vast-ai/vast-cli/master/vastai_sdk/SKILL.md


    ## Auth

    All endpoints require `Authorization: Bearer $VAST_API_KEY`.

    Get your key at: https://cloud.vast.ai/manage-keys/


    ## Key Quirks

    - `gpu_ram` in CLI = GB; in REST API = MB (CLI auto-converts)

    - SSH keys must be registered BEFORE creating an instance (VM: no recovery;
    Docker: can add post-create)

    - `onstart` field is limited to 4048 characters -- gzip+base64 for longer
    scripts

    - `POST /api/v0/asks/{id}/` (create instance) returns `new_contract` as the
    instance ID, not `id`

    - Poll trap: if `actual_status` becomes `exited`, `unknown`, or `offline` it
    will never reach `running` -- destroy and retry
  version: 1.0.0
  contact:
    name: Vast.ai Support
    url: https://discord.gg/vast
servers:
  - url: https://console.vast.ai
    description: Production server
security:
  - BearerAuth: []
paths:
  /api/v0/machines/{machine_id}/dnotify:
    put:
      tags:
        - Machines
      summary: Schedule Machine Maintenance
      description: >-
        Schedules a maintenance window for a single machine and sends downtime
        warning emails to affected instance clients and a confirmation to the
        host.
      parameters:
        - name: machine_id
          in: path
          required: true
          schema:
            type: integer
          description: ID of the machine to schedule maintenance for.
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                sdate:
                  type: string
                  format: date-time
                  description: Start date and time of the maintenance window.
                  example: '2023-10-30T14:00:00Z'
                duration:
                  type: integer
                  description: Duration of the maintenance window in hours.
                  example: 2
                maintenance_reason:
                  type: string
                  description: Reason for the maintenance.
                  example: Routine hardware check
                maintenance_category:
                  type: string
                  description: Category of the maintenance.
                  enum:
                    - power
                    - internet
                    - disk
                    - gpu
                    - software
                    - other
                  example: software
              required:
                - sdate
                - duration
      responses:
        '200':
          description: >-
            {success: true, machine_id, notifications_sent, you_sent: "N
            notifications sent"} on success.
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                    description: true on success
                  machine_id:
                    type: integer
                    description: ID of the machine scheduled for maintenance
                  notifications_sent:
                    type: integer
                    description: Number of client notification emails sent
                  you_sent:
                    type: string
                    description: Human-readable summary of notifications sent
              example:
                success: true
                machine_id: 1001
                notifications_sent: 3
                you_sent: 3 notifications sent
        '400':
          description: >-
            "maintenance_category can only be one of (power, internet, disk,
            gpu, software, other)" for invalid category, "Missing machine_id"
            when machine_id is unparseable, or "duration must be a positive
            number" when duration is invalid.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: >-
            "No such machine id" when the machine does not exist or is not owned
            by the caller.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '422':
          description: '"Missing sdate" when the sdate parameter is not provided.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - BearerAuth: []
components:
  schemas:
    Error:
      type: object
      properties:
        error:
          type: string
        msg:
          type: string
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: API key must be provided in the Authorization header

````