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Vilas County GIS — Vilas County, Wisconsin open geospatial data (ArcGIS).

dane.gov.pl — Poland's national open data portal (Otwarte Dane).

CNPJ Brazil MCP — Brazilian company-registry (Receita Federal) lookup via minhareceita.org, an…

Bank of Japan (BOJ) / Japan monetary MCP. Keyless.

District of Columbia DMV MCP — DMV service centers, the record-level vehicle-inspection file, and…

Comtrade MCP — UN Comtrade API for international bilateral trade data

BookBrainz MCP — open book metadata (MetaBrainz / sister of MusicBrainz)

Dad Jokes MCP — wraps icanhazdadjoke.com (free, no auth)

St. Louis County GIS — St. Louis County, Missouri open geospatial data (ArcGIS).

CATNAP (Compile, Analyze, and Tally Neutralizing Antibody Panels) + the LANL HIV Molecular…

FCC Open Data (opendata.fcc.gov) Socrata MCP.

US Code — the text of federal statutes, by citation.

Codex GSFA — the FAO/WHO General Standard for Food Additives (CXS 192-1995).

US Census Bureau Geocoder MCP

City of Tucson GIS — Tucson, Arizona open geospatial data (ArcGIS).

EBI BioStudies MCP.

Aix-Marseille-Provence Open Data (data.ampmetropole.fr) — OpenDataSoft MCP.

City of Tigard GIS — Tigard, Oregon open geospatial data (ArcGIS).

Dictionary MCP — wraps Free Dictionary API (free, no auth)

Citybikes MCP — wraps CityBik.es API (free, no auth required)