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Free, keyless real-time air quality (US AQI plus PM2.5, PM10, ozone, NO2, SO2, CO) for any city.
Free, keyless postal/ZIP code lookup: place name(s), state/region, and coordinates.
Free, keyless domain registration lookup via RDAP: registered, available, registrar, expiration.
Free, keyless public holidays lookup for any country and year, plus single-date holiday checks.
US tariff & trade truth: duty actually paid by origin/HS 2017+, HTS rulebook, CBP rulings. No key.
Australian economic data from the ABS, RBA, and APRA: CPI, GDP, cash rate, labour, and more.
12 Google News endpoints. Pay per call in USDC via x402.
Digitraffic AIS MCP — live vessel positions in Finnish and Baltic Sea waters.
Resolve scholarly identifiers (DOI, PMID, ISBN, arXiv, ISSN, ADS, WHO IRIS) into citations (10,000+ CSL styles) and exports (BibTeX, RIS, EndNote...), plus retraction, open-access, and citation-fabrication checks. Six tools, anonymous-friendly Streamable HTTP.
Population, income, poverty, education, housing, and commuting from the US Census ACS
ArXiv preprints + Google Scholar papers, with citation counts in one query.
News MCP: real-time headlines & custom news search across 7 regions. Free, just sign in with Google.
Google Trends search interest over time with growth metrics. Free key at trendsapi.ai
Trend data from Google, TikTok, Amazon, Reddit, YouTube, Steam, npm and more as JSON
Trend data from Google Trends, YouTube, TikTok, Reddit, Amazon, Wikipedia, npm, Steam and more
Search and download academic papers from arXiv, PubMed, bioRxiv, medRxiv, Google Scholar, Semantic…
Aircraft registry search, flight history, and analytics powered by ADS-B Exchange data.
30+ academic research tools from Semantic Scholar, Google Scholar, arXiv, PubMed, and clinical trial databases. Search papers, find citations, and explore scholarly data. $0.01/call
Romanian classified ads and business directory. Search 30K+ businesses, ads, exchange rates.