API & MCP

Everything a person can do on Cartograph Exonyms (what each country is called in 51 languages), a program or AI agent can do with the same inputs and get the identical result.

HTTP API

• POST https://cartographexonyms.usefulweb.site/api/v1/calculate – run Cartograph Exonyms (what each country is called in 51 languages)
• GET https://cartographexonyms.usefulweb.site/api/v1/tool – inputs, output schema, examples
• OpenAPI 3.1: /openapi.json · /openapi.yaml
• Errors: application/problem+json; 422 includes per-field errors.

Cartograph Exonyms (what each country is called in 51 languages)

Shows the name of a country in 51 languages (from Wikidata), writes every name in Latin letters and groups them into spelling families — Deutschland, Duitsland and Tyskland; Allemagne, Alemania and Almanya; Germania and Германия; Niemcy and Německo — and colours a map by the family each country’s main language uses. It is the exonym engine of the Cartograph app.

Example request

What Europe calls Germany

curl -X POST https://cartographexonyms.usefulweb.site/api/v1/calculate -H 'content-type: application/json' -d '{"country":"Germany","region":"europe"}'

Every result contains

inputs (normalised, defaults applied), summary, result (validated against the published schema), units, assumptions, sources, warnings, computedAt and links.

MCP (Model Context Protocol)

• Streamable HTTP endpoint: https://cartographexonyms.usefulweb.site/mcp – protocol revisions 2026-07-28 (stateless) and 2025-11-25 / 2025-06-18 / 2025-03-26 (initialize handshake).
• Tools: cartograph_exonyms
• Local stdio connector: node src/mcp-stdio.ts --tool=cartograph-exonyms

{
  "mcpServers": {
    "cartograph-exonyms": { "type": "http", "url": "https://cartographexonyms.usefulweb.site/mcp" }
  }
}