openapi: 3.1.0
info:
  title: Country State City Cities API
  description: The Country State City API exposes a global geographical reference dataset of 247+ countries, 5,000+ states / provinces, and 150,000+ cities with ISO codes, phone codes, currencies, native names, regions, sub-regions, coordinates, time zones, and flag emoji. Endpoints are read-only JSON REST resources authenticated with the X-CSCAPI-KEY header.
  version: '1.0'
  contact:
    name: Country State City API
    url: https://docs.countrystatecity.in/
servers:
- url: https://api.countrystatecity.in/v1
  description: Country State City API production
security:
- ApiKeyAuth: []
tags:
- name: Cities
  description: City reference data with coordinates and time zones, scoped by country and state.
paths:
  /countries/{ciso}/states/{siso}/cities:
    get:
      operationId: listCitiesByCountryAndState
      summary: List cities in a country and state
      tags:
      - Cities
      parameters:
      - name: ciso
        in: path
        required: true
        schema:
          type: string
      - name: siso
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: A list of city resources scoped to the country and state.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/City'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /countries/{ciso}/cities:
    get:
      operationId: listCitiesByCountry
      summary: List cities for a country
      tags:
      - Cities
      parameters:
      - name: ciso
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: A list of city resources scoped to the country.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/City'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /states/{sid}/cities:
    get:
      operationId: listCitiesByState
      summary: List cities for a state by numeric state id
      tags:
      - Cities
      parameters:
      - name: sid
        in: path
        required: true
        description: Numeric state identifier.
        schema:
          type: integer
      responses:
        '200':
          description: A list of city resources scoped to the state.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/City'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /cities:
    get:
      operationId: listCities
      summary: List all cities
      tags:
      - Cities
      responses:
        '200':
          description: A list of city resources.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/City'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    City:
      type: object
      properties:
        id:
          type: integer
        name:
          type: string
        latitude:
          type: string
        longitude:
          type: string
  responses:
    Unauthorized:
      description: Missing or invalid X-CSCAPI-KEY.
    NotFound:
      description: Resource not found.
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-CSCAPI-KEY
externalDocs:
  description: Country State City API Documentation
  url: https://docs.countrystatecity.in/api/introduction