OpenCitations MCP — citation index (COCI + general Index API).
Free
56,584 MCP servers
opendata.swiss MCP — Switzerland's federal open-data portal (CKAN catalogue).
Free
Opendatasoft (generic portal) MCP.
Free
FDA drug data via openFDA: adverse-event reports and safety-signal tools (FAERS search, event…
Free
Open Food Facts MCP.
Free
OpenLigaDB MCP — community-run, keyless football / soccer match data.
Free
OpenParliament.ca MCP — civic-tech mirror of the Parliament of Canada
Free
OpenSea MCP — NFT marketplace data (v2 API)
Free
OpenStates MCP — bills, legislators, votes in all 50 US states
Free
OpenWeather MCP — wraps the OpenWeatherMap API (openweathermap.org)
Free
OSRM MCP — routing via the public demo server
Free
OpenStreetMap Overpass MCP — programmatic queries against the OSM database
Free
Oyez SCOTUS MCP.
Free
Paraguay DNCP MCP — Paraguay government procurement / public contracts (keyless).
Free
phoenix-number MCP — wraps StupidAPIs (keyless — no credential needed)
Free
Phone number validation MCP.
Free
Photon MCP — OSM geocoder
Free
Pirate Weather MCP.
Free
Pixabay MCP.
Free
Politics Feeds MCP.
Free
Massive (formerly Polygon.io) MCP.
Free