OpenTopography MCP.
Free
1,834 MCP servers
Works with Grok BuildBy pipeworx-io
OQMD (Open Quantum Materials Database) MCP.
Free
Outlook Mail (Microsoft 365) MCP Pack
Free
PACER Case Locator (PCL) MCP — live US federal court case & party search on the
Free
Google PageSpeed Insights — runs Lighthouse against any public URL and returns the performance…
Free
passive-aggression MCP — wraps StupidAPIs (keyless — no credential needed)
Free
Patents MCP — wraps the USPTO Open Data Portal (ODP) Patent File Wrapper API
Free
Pexels MCP.
Free
PhishTank MCP — wraps PhishTank API (checkurl.phishtank.com)
Free
Phone number validation MCP.
Free
Pixabay MCP.
Free
Earth-observation imagery catalogue from Microsoft's Planetary Computer — search its open…
Free
Slovenia Open Data (podatki.gov.si) CKAN MCP.
Free
Politics Feeds MCP.
Free
Polymarket MCP — prediction-market data via Gamma + CLOB + Data public APIs.
Free
PostHog MCP — wraps PostHog Analytics API (app.posthog.com/api)
Free
POWO (Plants of the World Online, by the Royal Botanic Gardens, Kew) MCP.
Free
Islamic prayer times & calendar MCP (Aladhan API). Keyless.
Free
ProPublica Nonprofit MCP — ProPublica Nonprofit Explorer API (free, no auth)
Free
Prospeo MCP — wraps the Prospeo 'Enrich Person' API (prospeo.io)
Free
ProZorro MCP — Ukraine government procurement (keyless).
Free