openapi: 3.0.0
info:
  title: ISBNdb API v2 Author Feed API
  description: "Definition of ISBNdb.com API v2.\n\n***Note: A 404 Not Found response for an ISBN lookup typically\nindicates that the book information is not yet available in our database.\nHowever, due to frequent updates, there is a high probability that the data will be \nadded shortly, often within a minute or up to 24 hours. We recommend trying your request \nagain after a while, as the information may soon become accessible***\n"
  version: 2.7.0
servers:
- url: https://api2.isbndb.com
  description: API Endpoint
tags:
- name: Feed
  description: Feed endpoints for incremental sync
paths:
  /feeds/books/updates:
    get:
      tags:
      - Feed
      summary: Get recently updated book ISBNs
      description: 'Retrieves a list of book ISBNs that have been added or modified. This endpoint is designed for frequent incremental synchronization.


        **Important Notes:**

        * **Plan limits:** Available exclusively for **Premium** plans and higher.

        * **History limit:** The update history is strictly limited to the last **7 days**.

        * **Quota:** Calling this endpoint does not count towards your daily API limits.

        * **Pagination:** The response does not include a total field. To fetch all updates, continue requesting subsequent pages (incrementing the page parameter) until the data array in the response is empty.'
      operationId: get_app_api_feed_updatedbooks__invoke
      parameters:
      - name: page
        in: query
        required: false
        schema:
          type: integer
          nullable: true
          default: 1
          minimum: 1
      - name: pageSize
        in: query
        required: false
        schema:
          type: integer
          nullable: true
          default: 100
          maximum: 1000
          minimum: 1
      - name: lastUpdated
        in: query
        description: 'Filter by last updated date (Format: YYYY-MM-DD)'
        required: false
        schema:
          type: string
          nullable: true
          default: null
      responses:
        '200':
          description: Returns a list of recently updated book ISBNs
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UpdatedBooksResponse'
      security:
      - ApiKeyAuth: []
components:
  schemas:
    UpdatedBook:
      required:
      - isbn13
      - updated_at
      properties:
        isbn13:
          description: ISBN-13
          type: string
        updated_at:
          description: Timestamp when the book was last updated
          type: string
          format: date-time
      type: object
    UpdatedBooksResponse:
      required:
      - data
      - page
      - page_size
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/UpdatedBook'
        page:
          type: integer
        page_size:
          type: integer
      type: object
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      name: Authorization
      in: header