Data & Search

Unpaywall MCP — open-access lookup for scholarly papers (free, no key)

DoStuff network MCP.

Marginalia MCP — independent web search over a non-commercial, non-SEO index.

Sunrise-Sunset MCP — wraps the sunrisesunset.io API (free, no auth)

Montana State GIS — Montana open geospatial data (ArcGIS).

WAQI MCP — World Air Quality Index (free key)

World Bank Projects & Operations MCP.

CMS NPI Registry MCP

Wikimedia REST API v1 MCP.

Octopus Energy public API MCP — UK energy tariffs & products.

Maven Central MCP — Java/JVM artifact registry

National Bureau of Statistics of Moldova (Statbank) PxWeb MCP.

PermID MCP — Refinitiv / LSEG Permanent Identifier (free, requires API key)

DayPlay MCP — verified SF Bay Area places, events & walkable itineraries for AI agents. Free.

Browse the web and run Google search through real Singapore mobile carrier IPs.

OpenWeather MCP — wraps the OpenWeatherMap API (openweathermap.org)

EBI PRIDE Archive MCP — proteomics (mass-spectrometry) data repository.

Macau Statistics MCP — DSEC (Direcção dos Serviços de Estatística e Censos

Wiktionary MCP — multilingual dictionary via Wikimedia REST + MediaWiki Action API

Statistics Iceland (Hagstofa Íslands) PxWeb MCP. Keyless.