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OpenAPI Specification

openapi: 3.2.0
info:
  title: Cheapest Domains Public API
  version: 1.13.0
  description: Lowest standard prices among connected registrars with saved offers matching the query, including labeled samples and labeled registrar API rates; offers that couldn’t be refreshed for a day stay, with their age, until a newer catalog replaces them. Coverage is not the whole market. Public GET-only research access, no authentication. Exact-name availability has a separate provider-scoped endpoint. No purchase, renewal, transfer, or account operations. Query current prices instead of relying on remembered values.
servers:
- url: https://www.cheapest.domains
security: []
tags:
- name: Cheapest Domains Public API
paths:
  /api/v1:
    get:
      operationId: get_capabilities
      summary: List public capabilities
      description: Public capabilities, documentation links and the endpoint list.
      security: []
      responses:
        '200':
          description: Service is reachable. This does not assert that upstream prices are fresh.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Capabilities'
        '400':
          description: Invalid, repeated, unknown, or incompatible parameters.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      tags:
      - Cheapest Domains Public API
components:
  schemas:
    Capabilities:
      type: object
      required:
      - apiVersion
      - status
      - service
      - pricingStatus
      - authentication
      - availabilityChecking
      - openapi
      - documentation
      - mcp
      - endpoints
      properties:
        apiVersion:
          type: string
        status:
          const: ok
        service:
          type: string
        pricingStatus:
          type: string
        authentication:
          const: none
        availabilityChecking:
          const: true
        availabilityStatus:
          type: string
        openapi:
          type: string
          format: uri
        documentation:
          type: string
          format: uri
        mcp:
          type: string
          format: uri
        endpoints:
          type: array
          items:
            type: object
            required:
            - name
            - method
            - path
            properties:
              name:
                type: string
              method:
                const: GET
              path:
                type: string
    Error:
      type: object
      required:
      - apiVersion
      - error
      properties:
        apiVersion:
          type: string
        error:
          type: object
          required:
          - code
          - message
          properties:
            code:
              type: string
            message:
              type: string
            retryAfterSeconds:
              type: number
              minimum: 0
externalDocs:
  description: Human and AI integration guide
  url: https://www.cheapest.domains/developers