openapi: 3.1.0
info:
  title: Library of Congress Chronicling America Bills Titles API
  description: The Chronicling America API exposes historic American newspapers digitized through the National Digital Newspaper Program, providing search and metadata access to newspaper pages, issues, and titles.
  version: 1.0.0
  contact:
    name: Library of Congress
    url: https://chroniclingamerica.loc.gov/about/api/
servers:
- url: https://chroniclingamerica.loc.gov
  description: Production
tags:
- name: Titles
paths:
  /search/titles/results/:
    get:
      operationId: searchTitles
      summary: Search Titles
      description: Search newspaper titles by name, place, or other facets.
      tags:
      - Titles
      parameters:
      - name: terms
        in: query
        schema:
          type: string
      - name: state
        in: query
        schema:
          type: string
      - name: format
        in: query
        schema:
          type: string
          default: json
      - name: rows
        in: query
        schema:
          type: integer
          default: 20
      responses:
        '200':
          description: Title search results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TitleResults'
  /lccn/{lccn}.json:
    get:
      operationId: getTitle
      summary: Get Title
      description: Retrieve metadata for a newspaper title by LCCN.
      tags:
      - Titles
      parameters:
      - name: lccn
        in: path
        required: true
        description: Library of Congress Control Number.
        schema:
          type: string
      responses:
        '200':
          description: Title metadata
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Title'
  /newspapers.json:
    get:
      operationId: listNewspapers
      summary: List Newspapers
      description: List all newspaper titles with digitized content.
      tags:
      - Titles
      responses:
        '200':
          description: Newspaper list
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/NewspaperList'
components:
  schemas:
    NewspaperList:
      type: object
      properties:
        newspapers:
          type: array
          items:
            $ref: '#/components/schemas/Title'
    TitleResults:
      type: object
      properties:
        items:
          type: array
          items:
            $ref: '#/components/schemas/Title'
        totalItems:
          type: integer
    Title:
      type: object
      properties:
        lccn:
          type: string
        name:
          type: string
        place_of_publication:
          type: string
        start_year:
          type: string
        end_year:
          type: string
        url:
          type: string
          format: uri