Identity & Access

Math.js MCP — wraps the mathjs.org API (free, no auth)

GBIF MCP — wraps the Global Biodiversity Information Facility API v1 (free, no auth)

Weather MCP — wraps Open-Meteo API (free, no auth)

Gamedeals MCP — wraps CheapShark API (game deal aggregator, no auth required)

PyPI MCP — wraps the Python Package Index (PyPI) JSON API (free, no auth).

Radio MCP — wraps Radio Browser API (free, no auth)

QR Code MCP — wraps api.qrserver.com (free, no auth)

Timezone MCP — wraps timeapi.io (free, no auth)

CATAAS MCP — Cat as a Service (free, no auth)

Nobel MCP — wraps the Nobel Prize API v2 (free, no auth)

NWS MCP — US National Weather Service (no auth)

IP Lookup MCP — ip-api.com (free, no auth for basic usage)

Wikipedia MCP — wraps Wikipedia REST API (free, no auth)

StackExchange MCP — wraps the StackExchange API v2.3 (free, no auth required for read)

Fruityvice MCP — wraps Fruityvice API (free, no auth)

Videogames MCP — wraps Free-to-Play Games API (freetogame.com, free, no auth)

NSF Awards MCP — National Science Foundation award database (free, no auth)

XKCD MCP — wraps xkcd.com JSON API (free, no auth)

On This Day MCP — wraps byabbe.se/on-this-day (free, no auth)

Blockchain RPC for 125+ chains: endpoints, method support, probing and RPC calls with your key.