UK Carbon Intensity MCP (National Grid ESO).
Free
200 servers across marketing, seo & social, lifestyle & local, research, finance & commerce, security & testing, sales & crm, other, ai & agents, developer tools & repos, gaming & entertainment, web, search & scraping, search, design & media, e-commerce, email, browser automation, learning & documentation, analytics & monitoring, content management and files & storage. The largest is 42matters.
Marketing, SEO & Social · Lifestyle & Local · Research · Finance & Commerce · Security & Testing · Sales & CRM · Other · AI & Agents · Developer Tools & Repos · Gaming & Entertainment · Web, Search & Scraping · Search · Design & Media · E-commerce · Email · Browser Automation · Learning & Documentation · Analytics & Monitoring · Content Management · Files & Storage
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1825 MCP servers. 1825 of 1825 are free to start.
CareerOneStop MCP — wraps the CareerOneStop Web API (U.S. Dept. of Labor)
Free
Carbon MCP — UK Carbon Intensity API (free, no auth)
Free
Cat Facts MCP — wraps Cat Facts API (free, no auth)
Free
CATNAP (Compile, Analyze, and Tally Neutralizing Antibody Panels) + the
Free
cBioPortal MCP — cancer genomics portal.
Free
Israel Central Bureau of Statistics (CBS) MCP.
Free
CDC MCP — wraps CDC open data via Socrata API (data.cdc.gov)
Free
US Census Bureau Geocoder MCP
Free
US Census TIGERweb MCP — the Census Bureau's ArcGIS REST geography service
Free
Censys MCP — internet-scan search over the Censys Platform API (censys.com)
Free
China Air Quality MCP — nationwide hourly AQI from CNEMC (China National Environmental Monitoring Centre).
Free
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0 of 1825 use OAuth
The rest either hold an API key issued by the publisher or ask for nothing.
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