REST Countries Capital API

openapi: 3.1.0
info:
  title: REST Countries All Capital API
  description: REST Countries is a free, open-source RESTful API that returns information about world countries. Each country resource exposes ISO 3166-1 codes (cca2, cca3, ccn3, cioc), common and official names, native names, translations, capital cities, regions and subregions, continents, area, population, latitude and longitude, top level domains, calling codes, currencies, languages, timezones, demonyms, flags and coats of arms, postal code patterns, FIFA code, independence and UN membership status, regional bloc affiliations, driving side, Gini index, start of week, and links to map services. The API is read-only and unauthenticated; the canonical hosted version runs at restcountries.com and the source is maintained at github.com/apilayer/restcountries (community-run, MPL-2.0 licensed).
  version: '3.1'
  license:
    name: Mozilla Public License 2.0
    url: https://www.mozilla.org/en-US/MPL/2.0/
  contact:
    name: REST Countries
    url: https://restcountries.com
servers:
- url: https://restcountries.com/v3.1
  description: REST Countries v3.1 production
tags:
- name: Capital
  description: Lookup countries by capital city.
paths:
  /capital/{capital}:
    get:
      operationId: getCountriesByCapital
      summary: Get Countries By Capital
      description: Search countries by their capital city.
      tags:
      - Capital
      parameters:
      - name: capital
        in: path
        required: true
        description: Capital city name.
        schema:
          type: string
        examples:
          tallinn:
            value: tallinn
      - $ref: '#/components/parameters/FieldsQuery'
      responses:
        '200':
          description: A list of countries whose capital matches the query.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Country'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    Car:
      type: object
      description: Vehicular registration data.
      properties:
        signs:
          type: array
          items:
            type: string
          description: Distinguishing (oval) vehicle signs.
        side:
          type: string
          enum:
          - left
          - right
          description: Driving side.
    CapitalInfo:
      type: object
      description: Capital city metadata.
      properties:
        latlng:
          type: array
          items:
            type: number
          minItems: 2
          maxItems: 2
          description: Capital latitude and longitude.
    Country:
      type: object
      description: A country resource as returned by the REST Countries API.
      properties:
        name:
          $ref: '#/components/schemas/Name'
        tld:
          type: array
          items:
            type: string
          description: Internet top-level domains assigned to the country.
        cca2:
          type: string
          minLength: 2
          maxLength: 2
          description: ISO 3166-1 alpha-2 code.
        ccn3:
          type: string
          description: ISO 3166-1 numeric (UN M49) code.
        cca3:
          type: string
          minLength: 3
          maxLength: 3
          description: ISO 3166-1 alpha-3 code.
        cioc:
          type: string
          description: International Olympic Committee code.
        independent:
          type: boolean
          description: ISO 3166-1 independence status.
        status:
          type: string
          description: ISO 3166-1 assignment status (e.g. `officially-assigned`).
        unMember:
          type: boolean
          description: Whether the country is a United Nations member.
        currencies:
          type: object
          description: Currencies keyed by ISO 4217 code.
          additionalProperties:
            $ref: '#/components/schemas/Currency'
        idd:
          $ref: '#/components/schemas/InternationalDirectDialing'
        capital:
          type: array
          items:
            type: string
          description: List of capital cities.
        altSpellings:
          type: array
          items:
            type: string
          description: Alternate spellings of the country name.
        region:
          type: string
          description: UN demographic region.
        subregion:
          type: string
          description: UN demographic subregion.
        languages:
          type: object
          description: Official languages keyed by ISO 639-3 code.
          additionalProperties:
            type: string
        translations:
          type: object
          description: Country name translations keyed by ISO 639-3 code.
          additionalProperties:
            type: object
            properties:
              official:
                type: string
              common:
                type: string
        latlng:
          type: array
          items:
            type: number
          minItems: 2
          maxItems: 2
          description: Country latitude and longitude.
        landlocked:
          type: boolean
          description: Whether the country has no coastline.
        borders:
          type: array
          items:
            type: string
          description: ISO 3166-1 alpha-3 codes of bordering countries.
        area:
          type: number
          description: Geographic area in square kilometres.
        demonyms:
          $ref: '#/components/schemas/Demonyms'
        flag:
          type: string
          description: Unicode flag emoji.
        maps:
          $ref: '#/components/schemas/Maps'
        population:
          type: integer
          description: Estimated population.
        gini:
          type: object
          description: World Bank Gini index keyed by year.
          additionalProperties:
            type: number
        fifa:
          type: string
          description: FIFA country code.
        car:
          $ref: '#/components/schemas/Car'
        timezones:
          type: array
          items:
            type: string
          description: Country timezones in `UTC±HH:MM` form.
        continents:
          type: array
          items:
            type: string
          description: Continents that contain the country.
        flags:
          $ref: '#/components/schemas/Flags'
        coatOfArms:
          $ref: '#/components/schemas/CoatOfArms'
        startOfWeek:
          type: string
          enum:
          - monday
          - sunday
          - saturday
          description: First day of the week in the country.
        capitalInfo:
          $ref: '#/components/schemas/CapitalInfo'
        postalCode:
          $ref: '#/components/schemas/PostalCode'
    Maps:
      type: object
      description: Links to external mapping services.
      properties:
        googleMaps:
          type: string
          format: uri
        openStreetMaps:
          type: string
          format: uri
    InternationalDirectDialing:
      type: object
      description: International calling code descriptor.
      properties:
        root:
          type: string
          description: IDD root (e.g. `+1`).
        suffixes:
          type: array
          items:
            type: string
          description: Country code suffixes appended to the root.
    Currency:
      type: object
      description: Currency descriptor keyed by ISO 4217 code.
      properties:
        name:
          type: string
        symbol:
          type: string
    Demonyms:
      type: object
      description: Demonyms keyed by language code with gendered variants.
      additionalProperties:
        type: object
        properties:
          f:
            type: string
          m:
            type: string
    Flags:
      type: object
      description: Flag image references.
      properties:
        png:
          type: string
          format: uri
        svg:
          type: string
          format: uri
        alt:
          type: string
          description: Textual description of the flag for accessibility.
    PostalCode:
      type: object
      description: Postal code format descriptor.
      properties:
        format:
          type: string
          description: Human-readable postal code format mask.
        regex:
          type: string
          description: Regular expression validating postal codes.
    CoatOfArms:
      type: object
      description: Coat of arms image references.
      properties:
        png:
          type: string
          format: uri
        svg:
          type: string
          format: uri
    Name:
      type: object
      description: Country name, including official and common forms plus per-language native names.
      properties:
        common:
          type: string
          description: Common country name in English.
        official:
          type: string
          description: Official country name in English.
        nativeName:
          type: object
          description: Native names keyed by ISO 639-3 language code.
          additionalProperties:
            type: object
            properties:
              official:
                type: string
              common:
                type: string
    Error:
      type: object
      properties:
        status:
          type: integer
          description: HTTP status code.
        message:
          type: string
          description: Human readable error message.
      required:
      - status
      - message
  parameters:
    FieldsQuery:
      name: fields
      in: query
      required: false
      description: Comma-separated list of fields to return on each country. Up to 10 fields may be requested. Required on `/all`.
      schema:
        type: string
      examples:
        basic:
          value: name,capital,region,flags
  responses:
    NotFound:
      description: No country matched the query.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
externalDocs:
  description: REST Countries Documentation
  url: https://restcountries.com