CompleteDNS DNS History API

openapi: 3.1.0
info:
  title: CompleteDNS API v1 DNS History API
  description: The CompleteDNS API v1 returns the historical nameserver record for a domain (legacy version). The service tracks nameserver changes and domain drops and returns chronologically ordered events for a queried domain. Authentication is via an API key passed as a query string parameter. CompleteDNS recommends using the v2 API for new integrations.
  version: v1
  contact:
    name: CompleteDNS
    url: https://completedns.com/contact
  termsOfService: https://completedns.com/terms
servers:
- url: https://api.completedns.com/v1
  description: CompleteDNS v1 production API
security:
- apiKey: []
tags:
- name: DNS History
  description: Nameserver and drop history for a domain
paths:
  /dns-history/{domain}:
    get:
      operationId: getDnsHistory
      summary: Get DNS history for a domain
      description: Returns the full history of nameserver changes and drop events for the requested domain, including the count of changes, count of drops, years tracked, and a chronologically ordered list of events.
      tags:
      - DNS History
      parameters:
      - name: domain
        in: path
        required: true
        description: The fully qualified domain to look up.
        schema:
          type: string
          example: youtube.com
      - name: key
        in: query
        required: true
        description: API key issued in the CompleteDNS account API section.
        schema:
          type: string
      responses:
        '200':
          description: DNS history record for the domain.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DnsHistoryResponse'
        '400':
          description: Invalid domain or unsupported TLD.
        '401':
          description: Missing or invalid API key.
        '403':
          description: IP restriction or quota exhausted.
        '404':
          description: Domain not tracked.
components:
  schemas:
    NameserverChange:
      type: object
      properties:
        action:
          type: string
          enum:
          - added
          - removed
        nameserver:
          type: string
    DnsEvent:
      type: object
      properties:
        date:
          type: string
          description: Exact date or date range when the event occurred.
        type:
          type: string
          enum:
          - start_tracking
          - dropped
          - created
          - change
        nameservers:
          type: array
          items:
            type: string
          description: Active nameservers at the time of the event.
        changes:
          type: array
          items:
            $ref: '#/components/schemas/NameserverChange'
    DnsHistoryResponse:
      type: object
      properties:
        domain:
          type: string
          description: The queried domain name.
        drops:
          type: integer
          description: Total nameserver removal events recorded.
        changes:
          type: integer
          description: Total nameserver change events recorded.
        years:
          type: number
          description: Years of history tracked for the domain.
        was_parked:
          type: boolean
          description: Whether the domain was parked at any point in the history.
        events:
          type: array
          items:
            $ref: '#/components/schemas/DnsEvent'
  securitySchemes:
    apiKey:
      type: apiKey
      in: query
      name: key
externalDocs:
  description: CompleteDNS API v1 Documentation
  url: https://completedns.com/api/documentation/v1