openapi: 3.2.0
info:
  title: Ahrefs Subscription Information API
  description: Ahrefs API v3 gives programmatic access to Ahrefs' SEO, marketing, and AI-search data — backlinks, organic and paid traffic, keywords, SERPs, rank tracking, site audits, brand/AI-search visibility, web and social analytics, and account management. This is the full spec for every tool; each tool also has its own spec under /reference/.
  termsOfService: https://ahrefs.com/terms
  contact:
    name: Ahrefs
    url: https://ahrefs.com/
    email: support@ahrefs.com
  version: 3.0.0
servers:
- url: https://api.ahrefs.com/v3
  description: Ahrefs API v3
security:
- http:
  - read
tags:
- name: Subscription Information
  description: Subscription information.
paths:
  /subscription-info/limits-and-usage:
    get:
      tags:
      - Subscription Information
      summary: Limits and usage
      description: '>Requests to this endpoint are free and do not consume any API units.'
      operationId: subscription-info.limits-and-usage
      parameters:
      - $ref: '#/components/parameters/subscription-info.output'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/subscription-info.limits-and-usage'
            application/xml:
              schema:
                $ref: '#/components/schemas/subscription-info.limits-and-usage'
        '400':
          $ref: '#/components/responses/subscription-info.error_400'
        '401':
          $ref: '#/components/responses/subscription-info.error_401'
        '403':
          $ref: '#/components/responses/subscription-info.error_403'
        '429':
          $ref: '#/components/responses/subscription-info.error_429'
        '500':
          $ref: '#/components/responses/subscription-info.error_500'
components:
  schemas:
    subscription-info.limits-and-usage:
      properties:
        limits_and_usage:
          properties:
            api_key_expiration_date:
              type: string
              format: date-time
              title: api_key_expiration_date
              description: Date on which this API key will expire and stop working.
            subscription:
              type: string
              title: subscription
              description: Ahrefs subscription plan.
            units_limit_api_key:
              type:
              - integer
              - 'null'
              title: units_limit_api_key
              description: Limit for the number of API units that can be consumed via this API key per billing month (null = unlimited).
            units_limit_workspace:
              type:
              - integer
              - 'null'
              title: units_limit_workspace
              description: Total number of API units available to the workspace.
            units_usage_api_key:
              type: integer
              title: units_usage_api_key
              description: Number of API units consumed by this API key in the current billing month.
            units_usage_workspace:
              type:
              - integer
              - 'null'
              title: units_usage_workspace
              description: Number of API units consumed by the workspace in the current billing month.
            usage_reset_date:
              type: string
              format: date
              title: usage_reset_date
              description: Start date of the next billing period when the API units usage will be reset.
          type: object
      type: object
      xml:
        name: AhrefsApiResponse
    subscription-info.Error_response:
      properties:
        error:
          type: string
      type: object
      xml:
        name: AhrefsApiResponse
  responses:
    subscription-info.error_500:
      description: Internal Error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
    subscription-info.error_401:
      description: Unauthorized
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
    subscription-info.error_429:
      description: Too Many Requests
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
    subscription-info.error_400:
      description: Bad Request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
    subscription-info.error_403:
      description: Forbidden
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
        application/xml:
          schema:
            $ref: '#/components/schemas/subscription-info.Error_response'
  parameters:
    subscription-info.output:
      description: The output format.
      required: false
      explode: false
      schema:
        type: string
        enum:
        - json
        - csv
        - xml
        - php
      name: output
      in: query
  securitySchemes:
    http:
      type: http
      scheme: bearer