Country.io

Country.io Capitals API

Capital cities by ISO2 code.

Documentation GitHub OpenAPI

Operations 1

GET /capital.json Get capital cities keyed by ISO2 code #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/country-io-capitals-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Country.io Data Capitals API
  description: Country.io publishes a small set of static JSON files that map ISO 3166-1 alpha-2 country codes to common reference data (country names, capital cities, continent codes, ISO 3166-1 alpha-3 codes, telephone dialing codes, and currency codes). Each endpoint returns a flat JSON object keyed by the two-letter country code.
  version: '1.0'
  contact:
    name: Country.io
    url: https://country.io/contact/
  license:
    name: Country.io Data
    url: https://country.io/
servers:
- url: https://country.io
  description: Country.io static JSON host
tags:
- name: Capitals
  description: Capital cities by ISO2 code.
paths:
  /capital.json:
    get:
      operationId: getCapitals
      summary: Get capital cities keyed by ISO2 code
      tags:
      - Capitals
      responses:
        '200':
          description: A JSON object mapping ISO2 country codes to capital city names.
          content:
            application/json:
              schema:
                type: object
                additionalProperties:
                  type: string
                example:
                  US: Washington
                  GB: London
                  FR: Paris
externalDocs:
  description: Country.io Data Index
  url: https://country.io/data/