"National Rail" matching MCP connectors:

Global population estimates from WorldPop, 2000-2030, at country and sub-national levels.

Medicare coverage policy from CMS: national and local coverage determinations, plus open analyses

GovData.de MCP — Germany's national open-data portal (CKAN API).

NREL MCP — wraps the US National Renewable Energy Laboratory developer API

INEGI MCP — Mexico's national statistics office (INEGI) Indicators API.

UK Carbon Intensity MCP (National Grid ESO).

NOAA Weather MCP — National Weather Service forecasts and alerts

Czech National Bank (Česká národní banka, ČNB) public API MCP. Keyless.

dados.gov.pt MCP — Portugal's national open data portal.

National Bank of Romania (Banca Naţională a României, BNR) FX reference rates MCP. Keyless.

Argentina 'Series de Tiempo' MCP — national time-series API (apis.datos.gob.ar).

STATEC (Institut national de la statistique et des études économiques du

Narodowy Bank Polski (National Bank of Poland) Web API MCP. Keyless.

USGS Water MCP — wraps USGS National Water Information System (NWIS) REST services (free, no auth)

data.overheid.nl MCP — the Netherlands national open-data portal (CKAN API).

datos.gov.co — Colombia's national open-data portal (Socrata platform).

UK Office for National Statistics dataset catalogue + Beta JSON API

ISTAT (Istituto Nazionale di Statistica) MCP — Italy's national statistics

NASS MCP — USDA National Agricultural Statistics Service (Quick Stats)

dati.gov.it MCP — Italy's national open-data portal (CKAN API).