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

Smithsonian Open Access MCP.

TGA ARTG — the Australian Register of Therapeutic Goods, the Therapeutic Goods Administration's…

DataToronto MCP — City of Toronto open data (open.toronto.ca, CKAN API).

Greece Open Data (data.gov.gr) CKAN MCP.

Datafiniti MCP — wraps the Datafiniti Data API (datafiniti.co)

RubyGems MCP — wraps the RubyGems.org public API (free, no auth)

Code of Virginia — state statutes by citation.

Travelpayouts MCP — wraps the Aviasales Flights Data API (travelpayouts.com)

UCSC Genome Browser REST API — reference genome assemblies for ~250 species, the annotation tracks…

Texas State Procurement MCP — State cooperative-contract awards & vendor sales (keyless).

Date calculator MCP.

Solscan MCP — Solana block-explorer + network analytics

Massive (formerly Polygon.io) MCP.

NASA Aviation Safety Reporting System (ASRS) — de-identified aviation safety incident narratives.

ODRE Energy Open Data (odre.opendatasoft.com) — OpenDataSoft MCP.

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

Vimeo MCP.

SeatGeek MCP.

TomTom MCP — wraps the TomTom Search & Routing APIs (api.tomtom.com)